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 know-how have opened a brand new period. The CT scanner functionality is considerably more suitable as a result of elevated pace and isotropic spatial answer. This has yielded a broadening of the spectrum of purposes, quite in cardiac, vascular and belly imaging. although, a realistic 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 information units represents one other vital activity. This e-book includes the stories of a global workforce of specialists and it really is designed to supply the needful historical past wisdom in multidetector CT.
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Extra info for Multislice CT: A Practical Guide: Proceedings of the 5th International SOMATOM CT Scientific User Conference Zurich, June 2000
The rendering is performed using a software technique that assigns both opacity and color to each voxel in the data set. This VR engine can be implemented in either an image- or object order. The image order approach is generally referred to as 'ray-casting' . It scans the display screen and, by casting a viewing ray, determines for each pixel which volume cells are affected by it. The opacities and shaded colors encountered along the ray are summed to determine the opacity and color of the corresponding pixel.
Wildermuth et al. large MSCT data sets and provides a comprehensive view of the anatomic situation, especially for those clinicians who are not familiar with reviewing cross-sectional images . In addition, unlike other projection techniques, such as surface display and MIP, VR does not distort objects. With standard orthographic imaging, such as SSD or MIP, changing position can cause distortions in the image. With perspective VR, there is no distortion. Perspective VR requires a data set that permits 3D imaging, which basically means one with thin collimation.
Br J RadioI70:351-359 6. Brink et al. (1997) Depiction of pulmonary emboli with spiral CT: optimization of display window settings in a porcine model. Radiology 204:703-708 7. Luboldt et al. (1999) Effective contrast use in CT angiography and dual-phase hepatic CT performed with a sub second scanner. Invest RadioI26:751-760 Computer Modeling Approach to Contrast Medium Administration and Scan Timing for Multislice Computed Tomography KYONGTAE T. BAE, JAY P. HEIKEN Rationale for Computer Modeling of Contrast Enhancement Proper scan timing after contrast medium administration has always been important for computed tomography (CT).