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000-256 - Application Development with IBM Rational Application Developer For Web Sphere Software V6.0 - Dump Information

Vendor : IBM
Exam Code : 000-256
Exam Name : Application Development with IBM Rational Application Developer For Web Sphere Software V6.0
Questions and Answers : 107 Q & A
Updated On : June 22, 2017
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000-256 Questions and Answers

000-256



  1. The Application Deployment Descriptor can contain taglib directives that maps each JSP to the actual TLD file.

  2. The Application Deployment Descriptor can contain a <web-app> element containing a <taglib-location> that maps the URI to the actual TLD file.

  3. The Web Deployment Descriptor can contain a <taglib-uri> with a <taglib- location>that maps the URI to the actual TLD file.

  4. The <taglib-uri>serves as an alias for the TLD file that will be published as WEB- INF/taglib.tld.


Answer: C, D


QUESTION: 94

A developer notices errors in the Problems view indicating that references to classes and interfaces cannot be resolved. What is the MOST likely cause of the errors?


  1. A necessary JAR dependency is not available.

  2. The main class reference is not available.

  3. Unnecessary JAR files are referenced.

  4. The client project is no longer associated with an Enterprise Application.


Answer: A


QUESTION: 95

A developer is using a Web Diagram to design a Struts application. Which TWO of

the following Struts parts are available on the palette?


  1. Action Class

  2. Action Mapping

  3. ActionForm

  4. Struts Module


Answer: B, D


QUESTION: 96

A developer created a static Web project and imported all the resources. Afterwards, the developer realizes that, in addition to static resources, there are dynamic resources such as JSP pages. What is the BEST way to correct the situation?


  1. Use the "Convert to a Dynamic Web project" option to convert the static project to a dynamic project.

  2. Create a dynamic Web project and move all the resources to the new project.


  3. Create a dynamic Web project and move only the dynamic resources to the new project.

  4. Create a Java project and a dynamic Web project; then move the utility jars to the Java project and the dynamic resources to the dynamic web project.


Answer: A


QUESTION: 97

To add server side Java and client side JavaScript to handle user events in a

JavaServer Faces (JSF) page, the developer should:


  1. Use the Quick edit view to select the event and add code.

  2. Use the generated class to add both Java and JavaScript event code.

  3. Add a JavaBean to both the Page Data and Client Data views.

  4. Create Java Action classes for server side events and JavaScript files for client side events and include them in the JSF page.


Answer: A


QUESTION: 98

A developer customizes the Web perspective by rearranging the views. To make sure this customization is available after Rational Application Developer closes, the BEST action for the developer to take is to:


  1. Load the perspective from local history.

  2. Reset the perspective and rearrange the views on every startup.

  3. Save the current perspective with a unique name.

  4. Save the current perspective as a fast view.


Answer: C


QUESTION: 99

An EJB project has been exported to destination "File system". The resources must be added to a new workspace. Which of the following solutions will add the resources to the workspace with no errors, assuming there are no dependent resources?


  1. Create a new EJB project. Select "Import -> File system", browse to the location of the exported project, select it and choose "Create only selected directories".

  2. Create a new EJB project. Select "Import -> File system", browse to the location of the exported project, select it and choose "Filter Types..." to choose the folder structure.

  3. Select "Import -> File system", browse to the location of the exported project, select it and check "Create new EJB folder". The project will be created in the

    workspace.

  4. Select "Import -> File system", browse to the location of the exported project, and select it. An options dialog will appear, allowing a choice of folder structures in the workspace.


Answer: A


QUESTION: 100

A developer wants to completely remove a perspective from a given workspace. The perspective was saved previously but is no longer used. Which of the following is the BEST way for the developer to accomplish this?


  1. Open a new workspace.

  2. Use the Preferences dialog to remove the perspective.

  3. Use the Customize Perspective dialog to remove the perspective.

  4. Close the perspective.


Answer: B


QUESTION: 101

A developer has made multiple changes to a class using multiple saves, but now wants to undo all of them. What is the BEST way to revert to the original version?


  1. Use the "Compare With -> Latest from Head" feature to identify the changes between the current state of the class and the original state and then make those changes.

  2. Use the "Replace With -> Previous from Local history" feature to replace the current version with that of the original version.

  3. Use the "Replace With -> Local history" feature to replace the current version with that of the original version.

  4. Review each line of code in the class and undo the changes that were made.


Answer: C


QUESTION: 102

Developers can specify the workspace they want to use by doing which TWO of the

following?


  1. Select a specific workspace directory while launching the application.

  2. Open a command prompt, navigate to the workspace directory, and launch the application.

  3. Change the default workspace directory in the preferences.

  4. Use the -data argument when launching the application.


Answer: A, D



IBM 000-256 Exam (Application Development with IBM Rational Application Developer For Web Sphere Software V6.0) Detailed Information

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    Micro-computed tomography and nuclear magnetic resonance imaging for noninvasive, are living-mouse cholangiography

    Laboratory Investigation (2013) ninety three, 733–743; doi:10.1038/labinvest.2013.fifty two; posted on-line 15 April 2013

    James H Tabibian1,2, Slobodan I Macura3, Steven P O'Hara1,2, Jeff L Fidler4, James F Glockner4, Naoki Takahashi4, Val J Lowe5, Bradley J Kemp5, Prasanna okay Mishra3, Pamela S Tietz1,2, Patrick L Splinter1,2, Christy E Trussoni1,2 and Nicholas F LaRusso1,2

    The cholangiopathies are an etiopathogenically distinctive neighborhood of problems affecting the epithelial cells that line the three dimensional (3D) tubular network of bile ducts.1, 2, 3, 4, 5 because of their occurrence, development to liver cirrhosis and melanoma, and generally obscure pathogenesis, cholangiopathies account for a considerable share of the morbidity and mortality of all liver diseases.1, 6, 7 seriously important to unraveling the primary underpinnings of these complicated disorders is the construction of animal models and novel equipment to more desirable study 000-256 and symbolize them.eight, 9

    fundamental sclerosing cholangitis (PSC) is an instance of a persistent, idiopathic cholangiopathy, which lacks valuable medical remedy, and in which animal fashions have begun to display mechanistic insights.5, 10, eleven in the united states on my own, the incidence of PSC is estimated at 25 000 teenagers and adults, and estimated median survival from time of prognosis to demise or liver transplantation is 12 years.6, 7 PSC is characterised microscopically with the aid of biliary inflammation and fibrosis, and cholangiographically by biliary strictures alternating with dilatations and, hence, an irregular, ‘ragged’-performing biliary tree.10, 12, 13, 14 presently, probably the most favourite model of PSC is the mdr2 (abcb4) knockout (mdr2KO) mouse.eight, 9 Biliary disease during this model is as a result of increased hydrophobicity of bile (because of lowered phospholipid content), and includes ldl cholesterol gallstones, multifocal biliary strictures and dilations, cholestasis, and biliary fibrosis.8, 12, 15 aside from serum biochemical records, assessment of biliary sickness within the mdr2KO mouse, as well as choice murine models of PSC and different cholangiopathies, relies heavily on liver histology; this, besides the fact that children, requires killing the animal and limits longitudinal monitoring and is useful resource ingesting.

    Noninvasive imaging continues to benefit value and use in both clinical administration and animal fashions of the cholangiopathies and different diseases. on account that its preliminary description over twenty years ago,sixteen noninvasive hepatobiliary imaging with magnetic resonance (MR) cholangiopancreatography (MRCP) has evolved into a vital modality for the diagnosis and longitudinal surveillance of PSC and different cholangiopathies.13, 17, 18 MRCP offers effective, global anatomic records involving hepatobiliary sickness. however, it has some inherent barriers; eg, motion artifacts can lead to suboptimal picture first-class and cause false-advantageous interpretations or poor visualization of the bile ducts. moreover, the spatial resolution of MR can also not allow visualization of small intrahepatic bile ducts. as a result of these obstacles, some investigators have evaluated computed tomography (CT) cholangiography. CT cholangiography offers a considerable number of theoretical merits that may permit more advantageous visualization of smaller ducts however requires the administration of a contrast agent that's excreted into the biliary device.19, 20, 21 These contrast brokers, despite the fact, raise the risks linked to the exam and may not be excreted smartly in livers with impaired characteristic, consequently resulting in poor visualization of the bile ducts. In mouse fashions of cholangiopathy, a noninvasive hepatobiliary imaging components is required however is at the moment lacking.

    There are a few predominant challenges associated with live-mouse stomach imaging, in particular cholangiography. These include the simultaneous need for prime resolution (because of the diminutive dimension of murine bile ducts), high speed (to eliminate movement artifact from the lungs, coronary heart, bowel, and biliary easy muscle), high distinction (to differentiate bile ducts from surrounding liver tissue and adjacent blood vessels), and brief period of scans (to not cause undue morbidity). thus, the purpose of this examine became to investigate the methodological feasibility of micro-computed tomography (microCT) and MR imaging for noninvasive, live-mouse cholangiography and evaluate their advantage utility in assessing mouse models of cholangiopathy in vivo.

    top of web page materials and strategies Experimental Animals

    All animal processes have been reviewed and permitted by, and performed in accordance with, the Mayo health center Institutional Animal Care and Use Committee. a total of 15 mdr2KO (9 feminine, 6 male) mice, 7 wild-category (WT) mice (4 female, 3 male), and two bile duct-ligated (BDL) mice (1 feminine, 1 male) were protected in this examine. WT mice had been used as poor controls. BDL mice were used as tremendous controls to determine the ability of imaging to differentiate between acute biliary obstruction and sclerosing cholangitis (ie, mdr2KO mice); one BDL mouse underwent usual bile duct (CBD) ligation, while the different underwent selective appropriate hepatic duct ligation. All mice have been between 4 and eight months of age and weighed a median of twenty-two g (range 19–29).

    Mdr2KO mice had been killed and dissected instantly after imaging to correlate imaging effects with intraoperative findings. For mdr2KO mice that didn't have grossly distinguishable (ie, uniquely characteristic) biliary tract facets, livers had been perfused with 10% neutral buffered formalin, and liver histopathology turned into assessed with Masson’s Trichrome-stained paraffin-embedded serial sections as previously described22 to corroborate imaging findings. in a similar way, one BDL mouse become killed and dissected immediately after imaging and turned into examined grossly and histopathologically.

    Mice have been bred and maintained at the animal facility at Mayo hospital, with a 12 h light/dark cycle and free access to average mouse chow and water.

    Mouse instruction and Imaging

    Mice had been fasted for up to six h earlier than imaging. Anesthesia turned into precipitated in an animal chamber with a gasoline blend of oxygen (1 l/min) and 2% isoflurane (Abbott Laboratories, North Chicago, IL, united states). Following anesthesia, mice were transferred to a small rodent cradle or mouse coil for microCT and MR imaging, respectively. Anesthesia became maintained with 1.5–2.5% inhalational isoflurane.

    Micro-computed tomography  

    MicroCT turned into performed the usage of a Siemens Inveon PET/CT scanner (Siemens clinical solutions, Knoxville, TN, country). Parameters have been as follows: 360° rotation, 360 projections, 500 ms exposure time, eighty kV voltage, 500 μA present, and positive pixel dimension 28.09 μm. Acquisitions were reconstructed with a filtered backprojection algorithm, matrix dimension 512 × 512 × 256, the usage of manufacturer-provided application.

    To permit visualization of the biliary tree, three mice were injected intraperitoneally (IP) and two mice were injected intravenously (IV) with iodipamide meglumine (Cholografin) biliary contrast (Bracco Diagnostics, Princeton, NJ, u . s . a .). Escalating doses from 0.9 to 3 ml/kg had been used in response to physique floor enviornment normalization and results of preliminary scans.23 IP injection became carried out in the left decrease quadrant of the stomach put up-induction of anesthesia. IV injection changed into performed within the tail vein with mice in a custom cylindrical restrainer and under a heat lamp pre-induction of anesthesia. Mice have been scanned at distinctive time points after distinction injection.

    each mouse become scanned for up to a total of 2 h per day to evaluate diverse scans (eg, with and without contrast at distinctive time features post-distinction administration). Scans lasted ~11 min. After scanning, mice were observed for 1 h to ensure sufficient reheating and anesthetic recovery.

    Magnetic resonance  

    MR imaging turned into carried out the use of a Bruker Avance seven-hundred MHz, 16.four T vertical bore MR spectrometer equipped with mini-imaging accessories (Bruker BioSpin, Billerica, MA, country). A 16.four T spectrometer turned into used to maximize sensitivity (ie, sign-to-noise ratio, SNR). on account of shortening of the T2 (and T2*) and lengthening of the T1 tissue water relaxation instances at such excessive container strengths, repetition time (TR) must be longer and echo time (TE) shorter at sixteen.4 T than at 7 T as a way to keep the same detectable magnetization. the most remarkable effect of the T2 shortening is that the infrequent element should be lessen. thus, despite the fact imaging at sixteen.four T consequences in SNR advancements, these are in part offset by way of the alterations in leisure time alternate, the end outcomes of which is improved photos at larger fields, albeit less so than expected.

    besides the aforementioned challenges linked to mouse cholangiography, there are a couple of others which might be often not a controversy in clinical MRCP; eg, the mouse heart is discovered an awful lot closer to the liver, beats practically an order of magnitude sooner, and causes oscillatory action it's on the magnitude of mouse bile duct size. for this reason, we evaluated a number of diverse measuring (ie, imaging) methods, each and every with a various latitude of acquisition parameters, to check which would give the most effective visualization of the biliary tree, chiefly the intrahepatic bile ducts (table 1). The three methods that we ultimately pursued in line with promising preliminary outcomes have been faster quick Acquisition with rest Enhancement (TurboRARE), Half-Fourier Acquisition Single-shot faster Spin Echo (HASTE), and IntraGate quickly Low angle Shot (IntraGateFLASH). As described under, every of these three strategies has certain homes (or is appropriate with extra manipulations) that mitigate motional artifacts or present other benefits.

    TurboRARE, a spin echo method, changed into the simple 3D method investigated. TurboRARE imaging was performed together with respiratory triggering or gating to dispose of respiratory motion artifact; this is critical as pictures are acquired by way of Fourier transformation of the proper 3D raw information from ok-area, and action anywhere within the field of view (FOV) throughout a scan produces artifact along section and slice domains. To in the reduction of the fraction of blanking time with respiratory gating, the respiratory cost turned into invariably monitored (SA instruments, big apple, the big apple, united states of america) and managed via adjusting the heating air temperature (34–37 °C) and isoflurane attention (1.5–2.5%). normally, in 3D methods the FOV have to cover the complete visible object to keep away from aliasing. As regular intrahepatic bile ducts have a diameter on the order of one hundred μm, in-plane resolution of about the equal measurement is required. With FOV 51.2 mm × 25.6 mm × 25.6 mm, a matrix of 512 × 256 × 256 is imperative, which means that sixty five 000 (2562) k-space vectors should be received for a 3D records set with 100 μm/voxel isotropic decision. therefore, for prime-decision photographs (where 10 000–65 000 ok-area vectors should be accrued), 3D methods are intrinsically time-intensive, and much more so when combined with respiratory triggering (and to a lesser extent gating) techniques. Contributing to this long scanning time is the aforementioned precept of tissue water T2 (and T2*) rest time fitting shorter and T1 becoming longer at greater fields, on account of which rare element is restricted to ≤16 and TR to >1000 ms. hence, despite the strengths of TurboRARE methodology, there's an linked time penalty.

    IntraGateFLASH, a gradient echo method, eliminates periodic motional artifacts with the aid of recording the scout scan earlier than each and every ok-area vector and by way of reconstructing images from the k-space vectors with similar scout scans (a sort of retrospective gating). thus, acquisition need to be repeated repeatedly (10–100) to create a vector library gigantic sufficient to have a few k-area vectors with the equal scout phase to generate pretty much artifact-free pictures. Performing more repetitions helps dispose of respiratory and cardiac artifact, but additionally leads to longer scan time. The number of repetitions necessary is basically based on and raises with the volume of movement (eg, respiratory) and may range from 10–15 repetitions (yielding an approximate scan time of 5–10 min) to 50–one hundred repetitions (yielding an approximate scan time of 20–30 min). Of note, although clinically used FLASH (ie, for MRCP) is T1 weighted, we lengthened the echo time to consist of T2* weighting.

    HASTE, an ultrafast spin echo technique, eliminates motional artifacts by means of unexpectedly accumulating records from a single slice. youngsters respiratory movement artifact is not tricky to eliminate, cardiac action artifact is difficult. counting on the body temperature and degree of anesthesia, the mouse heart cost ranges between 250–500 beats/min, with a motional length between 150–240 ms. therefore, acquisition instances should still ideally be shorter than 100 ms. With an estimated echo time of four ms (in line with anticipated resolution and spectral width), this one hundred ms threshold is reached with rare ingredient 20–30. To maintain resolution on the order of 200 μm/pixel, a single slice is generated in two to four segments; with repetition instances on the order of seconds, this will also be bought within a couple of seconds. The biliary tree can then be reconstructed from multislice data; accordingly, 20 to 200 skinny slices are gathered, leading to a total acquisition time of 3–20 min. moreover acquisition being faster than the heartbeat, the leading abilities of HASTE in comparison with TurboRARE is that it's inherently a 2nd system; for that reason, motional artifacts (if any) don't propagate between the slices. therefore, in spite of the fact that some slices are corrupted, a valuable photo of the biliary tree can nonetheless be received.

    besides the above suggestions, we additionally evaluated the utility of IP gadoxetate disodium (Eovist, Bayer, Berkeley, CA, us of a), a gadolinium-containing paramagnetic distinction agent it is excreted during the biliary system, for making improvements to duct visualization. The dose used become in accordance with the body surface enviornment normalization formulation.23 We additionally assessed the utility of using IP glucagon (Sigma-Aldrich, St Louis, MO, country) at a dose of 0.15 mg/kg to assist decrease intestine motion artifact.24 each gadoxetate disodium and glucagon had been injected in the left reduce quadrant of the abdomen immediately earlier than scanning.

    MR scan instances ranged from ~2–70 min, reckoning on the system and parameters used. Mice have been imaged for as much as a total of four h per day and accompanied for 1 h later on to ensure anesthetic restoration.

    graphic Processing and analysis

    PMOD Biomedical picture Quantification and Kinetic Modeling application version 2.eighty five (PMOD applied sciences, Zurich, Switzerland) and Paravision 5.0/5.1 application (Bruker BioSpin) were used to manner and check out microCT and MR images, respectively. MR images have been additionally post-processed through the use of a highest-intensity projection (MIP) algorithm to create a projection cholangiogram that may be turned around and viewed from consumer-described angles.

    Visualization of here biliary constructions in mdr2KO mice, BDL mice, and handle mice become assessed by means of as a minimum three coinvestigators experienced in hepatobiliary imaging: gallbladder, extrahepatic (including hilar) bile ducts, and intrahepatic bile ducts. furthermore, detection of (1) cholelithiasis, ductal dilation, strictures, and irregularity changed into assessed in mdr2KO mice, and (2) gallbladder and ductal dilation changed into assessed in BDL mice.

    Ductal dilation changed into described as any duct with a diameter >300 μm or any intrahepatic duct with a diameter >a hundred and fifty μm or beyond third order (ie, branching).25 Ductal stricture became defined as a focal (circumferential) luminal narrowing or tapering with upstream dilation.26 Ductal irregularity turned into described as either strictures alternating with typical or dilated-acting ducts or as ‘ragged’-appearing intrahepatic ducts, as seen in PSC.13, 27, 28

    correct of web page consequences Micro-computed Tomography

    MicroCT scans have been performed in three mdr2KO mice (two feminine, one male). Preliminary scans without biliary contrast injection resulted in nonvisualization of biliary buildings because of insufficient hepatic smooth tissue distinction. hence, mice have been rescanned after IP injection of iodipamide meglumine biliary contrast. This amendment yielded visualization of the gallbladder, extrahepatic ducts, and intrahepatic ducts in three, two, and none of the three mdr2KO mice, respectively (figure 1a). It become referred to that hyperdense intragastric chow perceived to imprecise photos by causing streaking artifact, and for that reason fasting periods of 4 h had been made standard. This change resulted in decreased artifact, but once again, intrahepatic ducts couldn't be recognized.

    figure 1.

    distinction-more advantageous micro-computed tomography (microCT) photograph of mdr2 knockout (mdr2KO) mouse. (a) Intraperitoneal distinction-more suitable axial graphic demonstrating a normal-appearing gallbladder and common bile duct; intrahepatic ducts are not visualized. Hyperdense gastric contents are present and trigger streak artifact. (b) Intravenous contrast-improved coronal photo demonstrating normal-performing gallbladder and dilated hilar ducts; intrahepatic ducts are again no longer visualized regardless of addition of 6 h fasting.

    Full determine and legend (112K)

    hence, subsequent microCT imaging turned into performed with IV biliary distinction administration moreover 6 h fasting. This yielded marginally stronger visualization of hilar ducts, but intrahepatic ducts (or any aspects of sclerosing cholangitis) once more could not be definitively identified (determine 1b), in spite of the time interval between contrast administration and imaging. Of word, height biliary excretion following intravenous distinction passed off after ~15 min. regardless of better concentrations of IV distinction, the most effective appreciable alternate became the stronger amount of contrast within the proximal small bowel (unintentionally yielding enterographic photographs). moreover, one mouse that obtained a dose of three ml/kg of IV distinction in a single session died within a day. The other two mdr2KO mice survived IP and IV contrast injection, microCT scanning, and anesthesia.

    on account of the want for invasive contrast injection, the mortality associated with larger doses of contrast, and the nonvisualization of intrahepatic ducts despite these maneuvers, additional investigation with microCT was not pursued. These consequences, and those from MR imaging, are summarized in desk 2.

    Magnetic Resonance mdr2KO mice  

    Preliminary MR imaging turned into performed with the identical three mdr2KO mice used for microCT. the use of a lot of mainly T2-weighted strategies, there turned into respectable contrast between the biliary tree and surrounding liver tissue; this was carried out without administration of contrast and facilitated by the lengthy T2 rest time of bile. The gallbladder and extrahepatic ducts have been with no trouble visualized in all three mdr2KO mice, and intrahepatic ducts have been visualized in two of the three mice. Cholelithiasis became stated in these equal two mice as round, hypointense filling defects (determine 2a). One of these mice also had a markedly dilated CBD (1 mm in diameter) with choledocholithiasis, which was proven by anatomic dissection automatically after imaging (figure 2b).

    determine 2.

    Cholelithiasis and dilated commonplace bile duct in mdr2 knockout (mdr2KO) mouse seen with magnetic resonance (MR) imaging and confirmed by way of anatomic dissection. (a) Gallstones are seen as 0.35 mm, circular hypointensities. standard bile duct is dilated to over 1 mm, whereas the cystic duct appears to be of average or a little bit enlarged caliber (IntraGateFLASH (IntraGate fast Low perspective Shot), echo time three ms, repetition time eighty two ms, 30 repetitions, picture matrix 256 × 256 pixels, acquisition matrix dimension 128 × 128 pixels, decision one hundred twenty five × one hundred twenty five μm, slice thickness 250 μm, acquisition time 5.3 min). (b) Dissection of the equal mouse immediately after imaging demonstrates extensive cholelithiasis and a severely dilated typical bile duct with choledocholithiasis, according to MR findings.

    Full determine and legend (352K)

    certainly, it became apparent that scans longer than 20–25 min frequently resulted in compromised image nice. This time penalty was seemingly related to spontaneous biliary clean muscle contraction, various respiratory and heart quotes, periodic respiratory ‘sighs’ (ie, excessive-amplitude breaths), and intestinal motion. youngsters nonrespiratory-gated, rapid imaging might alter for some of these elements with photo oversampling and retrospective gating (ie, IntraGateFLASH formulation), it became not appropriate with 3D imaging (but became useful for high decision (eg, 100 μm) in-airplane photographs). Glucagon administration to reduce intestinal action had no apparent impact on graphic exceptional (statistics now not proven).

    five further mdr2KO mice had been scanned in an try to adjust methodology and enrich visualization of intrahepatic ducts. the usage of 3D respiratory-triggered TurboRARE, intrahepatic ducts had been extra evidently visualized, and MIP post-processing algorithms yielded visualization of the intrahepatic biliary tree in its totality, revealing irregular, strictured, dilated intrahepatic ducts per sclerosing cholangitis (figure 3a). further morphological particulars could be seen via rotating the 3D MIP video info, together with ‘beading’ of the intrahepatic ducts in some mice, a function attribute of PSC (figure 3b and Supplementary Video S1). Liver histology in these mice validated sclerosing cholangitis (determine 3c), as a result accounting for and corroborating the cholangiographic appearance. mainly, ductal abnormalities on MR imaging regarded more renowned in feminine mice; this discrepancy is according to the prior observation that hepatic biochemical parameters are more deranged in female as compared with male mdr2KO mice.29 All mdr2KO mice survived anesthesia and MR imaging.

    figure three.

    Magnetic resonance (MR) imaging with optimum depth projection (MIP) submit-processing demonstrates intrahepatic changes according to sclerosing cholangitis in mdr2 knockout (mdr2KO) mouse, as corroborated by using liver histology. (a) Coronal view of mdr2KO mouse biliary tree the use of MIP algorithm demonstrates dilated, diffusely irregular intrahepatic ducts (arrows) (TurboRARE (faster speedy Acquisition with leisure Enhancement) with respiratory triggering, echo time 8 ms, advantageous echo time 24, infrequent ingredient 8, photo and acquisition matrix 256 × 128 × 128 pixels, resolution 200 μm isotropic, acquisition time 39 min with respiratory rate of ~70 breath/min). (b) On sagittal view, the same MIP demonstrates extra aspects, including beading (arrow) and a sclerotic left ductal equipment, hallmarks of basic sclerosing cholangitis. (c) Trichrome-stained section of mdr2KO mouse liver ( × 10) demonstrates attribute aspects of sclerosing cholangitis, in line with MR findings.

    Full figure and legend (358K) WT (poor handle) mice  

    Seven WT mice were imaged with the same strategies as above. despite the fact the gallbladder and (at least a portion of) extrahepatic ducts were always visualized, visualization of the intrahepatic ducts was commonly marginal regardless of adequate contrast and suppression of vascular structures, corresponding to portal veins (figure four), albeit stronger with 2nd respiration-triggered HASTE imaging. When visualized, ducts were diminutive (none >300 μm), fewer in number in comparison with mdr2KO mice, and easy, ie, devoid of considerable abnormalities. Glucagon administration pre-imaging did not greatly enrich image quality or visualization of ducts. All WT mice survived anesthesia and MR imaging.

    figure four.

    Coronal magnetic resonance (MR) photo of untamed-type mouse demonstrating regular-performing gallbladder and a faint linear hyperintensity (white arrows) suggestive of the cystic duct. Black streaks in the liver signify attenuated vascular structures (IntraGateFLASH (IntraGate speedy Low attitude Shot), echo time four ms, repetition time 200 ms, 80 repetitions, picture matrix 512 × 256 pixels, acquisition matrix measurement 256 × 128 pixels, decision a hundred × 100 μm, slice thickness 1 mm, acquisition time 34 min).

    Full figure and legend (81K) BDL mice  

    BDL mice have been used to interrogate the capacity of MR imaging to distinguish between acute biliary obstruction and the sclerosing biliary disorder considered in mdr2KO mice. BDL mice have been imaged 1 and a pair of days post-BDL, all over which time progressive biliary tree dilation changed into visualized. via the 2d day, the mouse with CBD ligation changed into found to have a markedly dilated gallbladder with a distinct, circular morphology (figure 5a). The mouse with selective appropriate hepatic duct ligation verified expanding ductal dilation and hyperintensity of the right side of the liver (figure 5b). This mouse became dissected after the second day, and corresponding findings of a correct liver lobe infarction were observed grossly (determine 5c) and on histopathology (Supplementary determine S1).

    determine 5.

    photographs of bile duct-ligated mice demonstrating dilated biliary tree (with out sclerotic changes) and bile infarct. (a) Coronal magnetic resonance (MR) photograph of regular bile duct (CBD)-ligated wild-category mouse in which gallbladder (GB) is dilated to 5 mm in largest dimension, and distinctive intrahepatic ducts (arrows) are considered on account of biliary obstruction (HASTE (Half-Fourier Acquisition Single-shot rapid Spin Echo), echo time three.9 ms, positive echo time 19.5 ms, repetition time 3000 ms, four repetitions, infrequent element 36, graphic matrix 256 × 128 pixels, acquisition matrix size 256 × seventy two pixels, resolution 250 × 250 μm, slice thickness 0.5 mm, acquisition time 24 s per slice). (b) Coronal MR photo of correct hepatic duct-ligated mouse demonstrating dilated appropriate ductal gadget and right liver lobe hyperintensity, suggesting infarction (HASTE, echo time four.18 ms, helpful echo time 20.9 ms, repetition time 3000 ms, 4 repetitions, rare ingredient 36, picture matrix 256 × 128 pixels, acquisition matrix size 256 × 72 pixels, resolution 250 × 250 μm, slice thickness 0.5 mm, acquisition time 24 s per slice). (c) Dissection instantly after MR imaging on day 2 publish-appropriate hepatic duct ligation revealing gross findings of right liver lobe infarction ex vivo, corroborating in vivo MR findings. (d) Sagittal view of CBD-ligated mouse biliary tree using highest intensity projection publish-processing algorithm demonstrating vastly dilated GB, extra-, and intrahepatic ducts (arrows) (TurboRARE (faster speedy Acquisition with leisure Enhancement) with respiratory gating, echo time eight.45 ms, helpful echo time 42.2, infrequent element 16, picture matrix 512 × 256 × 200 pixels, acquisition matrix 364 × 176 × 142 pixels, decision one hundred μm isotropic, acquisition time fifty nine min with respiratory cost of ≈25 breath/min).

    Full figure and legend (251K)

    The basic condition of each BDL mice changed into tenuous, and protecting strong a must-have signals changed into intricate. thankfully, youngsters, it became obvious that after ~1 h of anesthesia and acclimation of the mouse inner the MR spectrometer, respiratory (and heart) fee became greater general and could be stably suppressed and maintained at 20–30 breaths/min. throughout this ‘deep’ anesthesia, for explanations which are discussed later, longer imaging times (as much as 60 min) have been viable and yielded superior 3D imaging consequences (figure 5d and Supplementary Video S2). As may also be viewed, youngsters the gallbladder and bile ducts have been diffusely dilated within the BDL mice, there turned into no facts of ductal strictures or irregularity, for this reason permitting correct big difference between BDL and mdr2KO mice.

    both BDL mice survived anesthesia and MR imaging, but have been killed after day 2 of imaging.

    Gadoxetate disodium distinction-stronger imaging of mdr2KO mice  

    although the biliary tree become frequently neatly-visualized with MR in diseased mice devoid of contrast administration, we explored the incremental utility of IP contrast enhancement in seven further mdr2KO mice. We found that at parameters optimized for contrast-improved imaging, use of gadoxetate disodium allowed for greater visualization of the biliary tree, mainly the intrahepatic ducts (determine 6a). exceptionally, it increased SNR and mitigated the time penalty mandatory for top-resolution scanning. here is further validated in figure 6b (and Supplementary Video S3), wherein 100 μm isotropic decision 3D cholangiography may be acquired in only 25 min (as in comparison with 45–60 min without distinction). Of be aware, one mouse died following distinction administration.

    determine 6.

    highest depth projection (MIP) magnetic resonance (MR) images of mdr2 knockout (mdr2KO) mice with and devoid of distinction. (a) With acquisition parameters optimized for contrast use (together with shorter scan instances, which would not be plausible devoid of contrast), use of gadoxetate disodium (right) allows improved visualization of the biliary tree, principally the intrahepatic ducts (TurboRARE (faster quick Acquisition with leisure Enhancement) with respiratory gating (TR 500) and partial Fourier radically change acceleration component 1.3, echo time eight ms, advantageous echo time 16, rare factor 4, picture matrix 256 × 128 × 128 pixels, acquisition matrix 197 × 84 × a hundred pixels, resolution 200 μm isotropic, acquisition time 19 min for each scan with respiratory price of ≈25 breath/min). (b) Accelerated, excessive-resolution in vivo cholangiography facilitated by using gadoxetate disodium-enhancement demonstrating irregular, focally dilated intrahepatic ducts because of multifocal strictures (arrows), consistent with sclerosing cholangitis (TurboRARE with respiratory gating (TR a hundred and fifty) and partial Fourier seriously change acceleration element 1.3, echo time eight ms, helpful echo time 16, infrequent component four, graphic matrix 512 × 256 × 256 pixels, acquisition matrix 394 × 168 × 198 pixels, decision one hundred μm isotropic, acquisition time 25 min with respiratory price of ~25 breaths/min).

    Full figure and legend (120K) properly of page dialogue

    during this look at, we investigated the feasibility and utility of using noninvasive imaging to function reside-mouse cholangiography. Our work demonstrates that: (1) microCT yields suboptimal bile duct visualization regardless of escalating doses of IP and IV contrast; (2) MR is secure and allows for visualization of the gallbladder, further-, and intrahepatic bile ducts in just about all mdr2KO mice with out requiring distinction administration; (3) the cholangiographic appearance of mdr2KO mice is akin to human PSC; (four) MR cholangiography can differentiate between mdr2KO, BDL, and WT mice; and (5) use of gadoxetate disodium MR distinction can enrich duct visualization and shorten scan instances. To our potential, this is the first look at of noninvasive, live-mouse cholangiography; the findings herein suggest that MR cholangiography is a promising novel modality to noninvasively and longitudinally investigate mouse (and sure other small rodent) fashions of PSC and other cholangiopathies, together with polycystic kidney and liver sickness,30C. parvum-brought on cholangitis,31 and hepatic graft versus host disorder.32 As such, it holds expertise as a brand new tool to greater look at disorder pathogenesis and therapeutic response in existing fashions of cholangiopathy and facilitate construction of novel and greater clinically relevant models. in addition, MR cholangiography may also accelerate translation of animal model findings to the scientific enviornment, in which MRCP has now not handiest enhanced patient care, but is also rising as an endpoint in clinical trials.

    Drawing on our event with MRCP and in accordance with outcomes obtained herein from our mouse imaging experiments, a number of important observations have been made during this analyze. Fasting of mice become mentioned to be a vital prerequisite as with hepatobiliary imaging in humans; the mechanism involved is not totally clear, but is probably going a mixture of expanded bile-duct filling and diminished smooth muscle pastime in bile ducts and viscera. Glucagon administration had no obvious effect on picture fine; opioid agonists akin to morphine could be more useful in this regard and can merit future exploration, besides the fact that children with warning to now not cause undue mouse morbidity. Respiratory triggering or gating was imperative in definite methods (ie, 3D TurboRARE), however become much less critical with quicker imaging (ie, HASTE) and graphic oversampling (ie, IntraGateFLASH) methods. additionally, the utility of respiratory triggering or gating became compromised when mouse respiratory rate changed into irregular or quick; this referred to, as outlined previously, we followed that deep anesthesia (ie, after 1 h of mouse acclimation to being inner the spectrometer and below anesthesia) accepted mouse stabilization and longer scans devoid of SNR diminution as a result of artifact, consequently yielding advanced photo great (determine 5d and Supplementary Video S2). finally, as with clinical MRCP, there are certain strengths and weaknesses to each and every imaging formula; eg, we found that second HASTE and IntraGateFLASH yielded swift scans with amazing in-aircraft decision, whereas 3D TurboRARE with submit-processing the usage of a MIP algorithm provided a simplified, enormously useful world view of the biliary tree in a single photograph (or video). an additional skills of HASTE is that motion artifact is localized within the affected slice (ie, it doesn't propagate through the whole photo).

    however mouse stomach imaging with microCT and MR is smartly based, the software of those suggestions to performing committed are living-mouse cholangiography has now not been described before. it can be cited, even though, that other strategies of researching the murine biliary tree had been mentioned. as an instance, close-infrared fluorescent cholangiography has been these days applied to murine biliary imaging; despite the fact preliminary consequences seem favorable, this is an intraoperative method that requires laparotomy and intravenous injection of a fluorochrome probe.33 in addition, even within the setting of comprehensive biliary obstruction, it has now not been proven to enable visualization of intrahepatic ducts, whereas this changed into carried out with our strategies (Figures 5a and d, and Supplementary Video S2). We and others have proven that biliary casting gives wonderful counsel regarding biliary architecture, however this is a labor-intensive technique that requires killing the animal and ex vivo retrograde biliary injection of liquid resin, hence precluding longitudinal studies.34, 35 Diffraction-more desirable radiography has been previously stated, but this too is performed ex vivo and doesn't differentiate smartly between bile ducts and veins, especially in non-BDL mice.36 for this reason, despite the fact a number of alternative strategies exist, they're substantially greater invasive, labor-intensive, and/or much less delicate than people who we have described herein.

    several limitations advantage acknowledgment in our study 000-256. For microCT, we didn't employ nanoparticulate contrast, continual infusion of contrast through an IV catheter, respiratory triggering or gating, or deep anesthesia (ie, for ≥1 h earlier than imaging); besides the fact that children these maneuvers would greater entirely interrogate the knowledge of microCT, we agree with they might result in only modest improvements. furthermore, they might no longer alter the proven fact that microCT mandates contrast administration to imagine the biliary tree and would likely lead to improved labor and/or expenses. With respect to MR, our preliminary experiments on 7-T spectrometers imply that longer echo times may be used, but this benefit doesn't entirely catch up on the advanced sensitivity of the 16.four T gadget; imaging with three T medical scanners does not supply adequate resolution to visualize the murine biliary tree (information not proven). Slice thickness changed into now not a focus of this examine, youngsters in usual, increasing slice thickness resulted in bigger SNRs, albeit sacrificing anatomic details. We did not systematically get rid of nonhepatobiliary structures, akin to spine or belly, from MIP photographs and videos; in future stories, we hope to crop these structures pre-projection to be able to maximize distinction and picture clarity and facilitate quantitative measurements. lastly, the number of animals investigated turned into constrained, but ample to finished the objectives of this preliminary analyze.

    The experiences herein have led to positive insights for additional development and protocol development, together with right here counsel: (a) fasting mice for ~6 h before imaging; (b) pre-anesthetizing for at least 1 h earlier than imaging; (c) preserving respirations at 20–30 breaths/min, principally for respiratory-gated TurboRARE scans; (d) respiratory gating or varied repetitions (ie, oversampling) to alter for respiratory motion; and (e) when you consider that use of gadoxetate disodium MR contrast to increase duct visualization and shorten scanning times (depending on the aims of the specific test, and weighing the knowledge physiologic affect and dangers of repeated distinction injection for longitudinal experiences). We consider that as with the scientific MRCP journey, construction of a murine MR cholangiography protocol will require further work guided in part by way of the above, as well because the adventure of other investigators. until then, a mixture of numerous methods is likely to deliver essentially the most complete counsel, however fewer methods can also be used counting on the query of hobby.

    In conclusion, noninvasive mouse MR cholangiography is a feasible and promising formula for evaluation and longitudinal monitoring of hepatobiliary disease in vivo. Our findings up to now motivate further development and optimization of this components, in addition to adaptation to a broader latitude of mouse and other small rodent fashions of cholangiopathy.

    precise of web page conflict of pastime

    The authors declare no conflict of pastime.

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    Mesajımız

    Kurulduğu günden bugüne sektörde uctan uca çözümler sunan Bilgis; çalışanları, müşterileri ve iş ortakları nezdinde dürüst, güvenilir ve saygın bir şirket olarak kalmaya devam edecek bu yönde kurumsallaşacaktır.

    Türkiye’de son çeyrek yüzyılda köyden şehirlere göç şehir nüfusun % 25 oranında artmıştır. Bu sebeble kentte yaşayanların sosyo ekonomik sıkıntılar oluşmasına neden olmuştur . Şirketimizin Türkiye’nin çeşitli ilçelerinde yapmış olduğu Sosyal Doku Analizi çalışmalarında Kentlerimizin marka değerinin yükseltilmesi, ekonomik ve sosyal problemlerin iyileştirilmesi, engelliler için daha fazla alan sağlanması Ülkemizin küresel boyutta kalkınması için gerekliliği ortaya konulmuştur.

    Bu anlamda Bilgis; ülke ekonomisi, yerel yönetimlerin en yüksek teknolojiyi kullanarak yeni iş modelleri üzerinde büyük AR-GE yatırımları yapmıştır. Her yerel yönetimin marka olabilmesi, vatandaşların isteklerinin anında karşılanması ve bunun için kaynak bulunması için Bilgisçalışanları, tedarikçileri uyum içinde çalışmaktadır.

    Bilgis olarak ürün ve hizmetlerimizin en iyi teknolojide olmasını sağlamak, müşterilerimizin ihtiyaç ve beklentilerinin ötesine geçerek uluslararası kalite ve standartlarda ürün ve hizmet sunmak ilk önceliğimizdir.

    Kurulduğu yıldan bugüne sektörde öncü ve yönlendirici bir kuruluş olmayı kendine ilke edinmiş olan Bilgis; çalışanları, müşterileri ve iş ortakları nezdinde dürüst, güvenilir ve saygın bir kuruluş olarak kalmaya devam edecektir.

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