By Steven E. Seltzer (auth.), Borut Marincek M. D., Pablo R. Ros M. D., MPH, Maximilian Reiser M. D., Mark E. Baker M. D. (eds.)
The dual advancements of spiral CT and multidetector array expertise have opened a brand new period. The CT scanner functionality is considerably more desirable as a result of elevated pace and isotropic spatial answer. This has yielded a broadening of the spectrum of purposes, really in cardiac, vascular and stomach imaging. even if, a pragmatic problem of multidetector CT is the necessity to pick out a wide selection of user-selectable parameters within the attempt to provide an optimum examine. The dealing with of massive facts units represents one other vital activity. This e-book includes the reports of a global crew of specialists and it really is designed to supply the needful heritage wisdom in multidetector CT.
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Additional resources for Multislice CT: A Practical Guide: Proceedings of the 5th International SOMATOM CT Scientific User Conference Zurich, June 2000
Can be utilized and injected at a high flow rate. The same injection protocol can be applied also when assessing the pulmonary vasculature in cases of suspected pulmonary embolism . m. of at least 35% but even greater in most cases. m. necessarily is increased, although still limited relative to single-slice spiral CT. Particularly when a limited volume is studied and the scanning time is short, it is advisable to avoid too early or delayed studies, to perform a test bolus sequence, or to find a method for determination of bolus arrival.
For imaging of aortic stents, SSD are a quick method to display the basic anatomy, screen for endograft leakages, and evaluate the ideal localization of the stent placement. Volume Rendering Volume rendering (VR) is the representation, visualization, and manipulation of objects represented as sampled data in three or more dimensions. VR differs from conventional 3D graphics in that traditional graphics represent object surfaces and boundaries using polygons or triangles . VR displays visual images directly from volume data, enabling the viewer to fully reveal the internal structure of 3D data.
X . X'x. 50 X 'X 40 10 0 b .. 250lbs •.......... '----------' ........ 'X·x. x·x ·x~x I 3U 211 ' ..... -.... -'" "XXX. x. -·-1. 5 Time (min) Fig. Sa, b. Simulated contrast enhancement curves with four different body weights. Simulated enhancement curves of the aorta (a) and liver (b) based on a hypothetical adult male with a fixed height (173 em) and varying body weight (50,73,91, 118 kg), subject to injection of 125 ml of 320 mgI/ml contrast agent at 5 mils. The magnitude of contrast enhancement is inversely proportional to the body weight Computer Modeling Approach to Contrast Medium Administration and Scan Timing 35 Finally, this model may be useful in improving our understanding of the effects of various physiologic and pharmacokinetic parameters on CT contrast medium enhancement, such as contrast medium volume (Fig.