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 chances 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 lower than part a minute make radiological analysis extra exact. Blind gaps aren't any longer a tremendous challenge, and all constructions, specifically within the lungs, could be pointed out and clinically determined. the sensible event of knowledgeable groupof medical researchers and physicists is now made on hand during this book.
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Extra info for Advances in CT II: 2nd European Scientific User Conference SOMATOM PLUS, Berlin, March 1992
Nevertheless, the quality of SVCT scans is not equivalent to that obtained with conventional CT in the demonstration of normal anatomy. We noticed that a pleural membrane and hypostasis were missing, and radiation-induced fibrosis became blurred. But these disadvantages never aggravated the diagnosis. A new application for SVCT may be the examination of patients with artificial respiration. It allows the acquisition of 12-24 scans while the artificial respiration is interrupted. Diagnosis of the most important lung diseases such as pneumonia, pleural effusion, or ARDS seems to be possible, and SVCT shortens the examination time.
The disadvantage of SVCT is that only subvolumes of the lung can be scanned in a single breath hold. To examine the complete volume, a second SVCT has to be performed in connection with the last scan of the first spiral volumetric CT. The quality of SVCT images is comparable to standard CT images. References 1. 2. 3. 4. 5. 6. Costello P, Anderson W, Blume D (1991) Pulmonary nodule: evaluation with spiral volumetric CT. Radiology 179: 875-876 Kalender WA, Seissler W, Klotz E, Vock P (1990) Spiral volumetric CT with single-breath-hold technique and continuous transport and scanner rotation.
0-s scan time (Table 3). 0-s CT scanning. 7-s CT scanning. Discussion It is obvious that our opinion about a normal CT examination of the mediastinum and hilum has changed during the past decade. The CT image quality has dramatically improved. The fastest scanning time of a second-generation scanner was 18 s; third generation scanners have scan times as short as 2 s. Spatial and contrast resolution were greatly improved, artifacts were reduced but unfortunately are still quite common with state-of-the-art scanners.
Advances in CT II: 2nd European Scientific User Conference SOMATOM PLUS, Berlin, March 1992 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.)