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 under part a minute make radiological prognosis extra exact. Blind gaps are not any longer a big challenge, and all constructions, particularly within the lungs, should 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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Additional info for Advances in CT II: 2nd European Scientific User Conference SOMATOM PLUS, Berlin, March 1992
These results of healthy normals serve as control data in the clinical evaluation of patients with known or suspected pulmonary disease, as shown in the following examples. 1. 31 (kPa x s). 1 %. 4), whereas both sides at levels T"Fmnlhv«'me" «-925) index "Lung" index (-924 to -800) "Fibrosis" index (>-799) Fig. 2. CT values (HU, x± SD) and ranges (min, max) of 26 healthy normal subjects determined at three levels of the lung at 50 % of actual VC and the frequency distribution of CT values as indexes of emphysema, lung parenchyma and fibrosis 20 R.
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. Another advantage of SVCT is that the radiation dose is significantly reduced . Conclusion Continuity of sections is the main advantage of pulmonary SVCT. In contrast to standard CT, it avoids omission.
M. Mali Introductiou Imaging techniques have improved dramatically over the past decade. discernable with 3 Hounsfield units (HU) and 20 mGy. Scan exposure times play an important role in the depiction of small structures in and around moving organs, such as in the thorax. Third generation CT scanners allow us scan exposure times of less than 3 s, but motion is still a major problem with a time resolution of 2 s, resulting in inconsistencies of the view data. The obvious way to reduce motion artifacts is to employ a shorter scan time.
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.)