By P. A. Gevenois, P. De Vuyst, M. Littani, J. Zanen, P. de Franquen, J. C. Yernault (auth.), Professor Dr. R. Felix, Professor Dr. M. Langer (eds.)
Significant improvement made within the Siemens CT scanner SOMATOM PLUS have opened new percentages for diagnostic imaging in computed tomography. Spiral CT with a continously rotating X-ray tube and synchronous desk increments for as much as 60 cm in under part a minute make radiological analysis extra exact. Blind gaps are not any longer a big challenge, and all constructions, specifically within the lungs, may be pointed out and clinically determined. the sensible adventure of knowledgeable groupof scientific researchers and physicists is now made on hand during this book.
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Extra resources for Advances in CT II: 2nd European Scientific User Conference SOMATOM PLUS, Berlin, March 1992
One of the best and oldest ways to cope with motion in imaging is to reduce the exposure time. 7-s scan time 32 M. Oudkerk et al. Fig. I. 0-s scan with streak artifacts in the area of the pericardium and pulmonary trunk, arteries, and aortic root. 7-s scan at the same level, in the same patient as in a, no artifacts are detected a b Fig. 2. 0-s scan with streak artifacts in the area of the pericardium, aortic root, and left atrium. 7-s scan at the same level, in the same patient as in a, no artifacts are detected.
3% 3. 13 (kPa x s). 5 % (Fig. 8, Tables 6,7). Rienmlilier et al. Table 5. ]. 0 I Pat. w. $$2 ·112 --- Mean -M2 .. ,2 ,,,"'" ± 1 SO ·782 ·712 -M2 .. ,2 ·582 -512 - - Pat. , Level: 5 em HU t Fig. 6. CT histogram of 26 healthy nomlal subjects (mean ± SD) and of the patient with Good· pasture's syndrome 5 cm above the carina % 25 r----~------~-------------------~ E --- Mean L ",,'''' ± 1 SO F - - Pat. , Level: 5 em J. Fig. 7. CT histogram of 26 healthy nonnal subjects (mean ± SD) and of the patient with Good· pasture's syndrome 5 cm below the carina The analysis of the regional frequency distribution of CT values shows a somewhat higher increase of the emphysema index of the right lung than of the left lung.
Again, ROIs can be drawn to suit the Fig. 4. Hayball et al. pathological findings. Accordingly, perfusion characteristics of the caudate lobe could be differentiated from those elsewhere in the liver in conditions such the Budd-Chiari syndrome. The perfusion characteristics of various forms of cirrhosis are amenable to study. For example, the characteristic hypertrophy of the lateral segment of the left lobe of the liver in alcoholic cirrhosis  might appear as a result of vascular redistribution.