By Priv.-Doz. Dr. med. Claus Claussen, Dr. med. Bernd Lochner (auth.)
The authors current their event in additional than seven years of dynamic computed tomography in medical perform. Time density curves and attribute examples in particular areas of curiosity improve the presentation. Dynamic computed tomography makes an incredible contribu tion to the prognosis and assessment of a pathologic method: the demonstration of the dynamics of blood circulate in the lesion and surrounding common tissue. due to the fact either the lesion itself and adjoining common tissue reveal attribute findings in every one circulatory part, the examine offers a large number of facts at the circulation of blood and distinction fabric which facilitate either reputation and diiferentation of a lesion. overdue reviews following management of a distinction agent permit an estimate of the passage of the distinction medium to the inter stitium, that's of diagnostic value. Chapters facing particular scientific entities additionally include worthwhile details at the most excellent technique of distinction agent management (bolus injection or infusion) in addition to a dialogue of symptoms for the method. Dynamic computed tomography represents an important develop over traditional computed tomography in a few events, and this indicates an immense contri bution to the diagnostic features of the medical radiologist. The authors are to be counseled for the truth that they've got sincerely outlined the bounds of dynamic computed tomography. i am hoping that the 1st English language variation, following the appea rance of the German model in 1983, could be good received.
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Additional resources for Dynamic Computed Tomography: Basic Principles and Clinical Applications
The contrast agent is visible in the superior vena cava and the right atrium at 34 s. 6 Critical Evaluatiou Relatively long scan times of 3-5 s place a major limitation on the use of CT in the diagnosis of cardiac disease. Improvement in the quality of images will require a significant reduction in scan times to below 1 s, and scan times in milliseconds will permit efficient function studies of the heart. ECG-triggered CT studies are generally performed in a single slice, and several investigators have attempted ECG-triggered studies in systole and diastole in transverse, sagittal and vertical planes in an effort at producing threedimensional images which provide quantitative information on regional wall motion and ejection fractions.
14b). Administration of a bolus of physiologic saline solution does not change bolus geometry and dynamics in the aorta, and this maneuver is unnecessary in dynamic CT studies and digital subtraction angiography. _......... __ UIG a eL-----~----~------~----~------~----~----~------~----~----~ 60 180 240 300 o 120 Contrast mediu. t i on Rngiografin Flowrat. , 306 _91/ .. ------------~----~~----~----~----__, 1> HU LIVER 60 40 .. ~~ . it! 1 Dose: 3ge mgt/kg 180 Flowrat. 248 nc 300 variable Fig. 148, b.
Male, 81 years). The precontrast scan shows a space-occupying lesion measuring 5x4 cm which is located superior and dorsal to the left hilum of the lung; the lesion is not clearly delineated against the descending aorta. An aneurysm was also considered as a possible diagnosis. Administration of a contrast agent allows clear delineation of the tumor, which demonstrates low contrast enhancement. 4 Experimental Hepatic Neoplasms Experiments were performed in laboratory animals to determine whether isodense tumors which do not appear in plain CT scans can be visualized with the help of bolus injection of a contrast medium.