By S. Saini, G.D. Rubin, M.K. Kalra
Computed tomography (CT) is the main swiftly evolving clinical imaging know-how. This ebook describes present exam recommendations and complex medical functions of state of the art multidetector computed tomography (MDCT) scanners in chapters contributed by means of a number of extraordinary radiologists and clinicians. every one bankruptcy is written from a realistic viewpoint, in order that radiologists, citizens, scientific physicists, and radiology technologists can receive correct information regarding MDCT functions in neuroradiology, cardiac imaging, chest, belly, and musculoskeletal radiology subspecialties. every one co-author offers pertinent illustrations and tables for greater knowing of present and complicated purposes of MDCT scanners. Readers will enjoy the adventure those authors describe in chapters on MDCT know-how, distinction management thoughts, distinction adversarial results and their administration, and complicated functions of MDCT.
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Additional info for MDCT A Practical Approach
88. 89. 90. 91. 92. 93. 94. ic spiral CT: reduction of dose of intravenous contrast material. Radiology 197:83–88 Takeshita K (2001) Prediction of maximum hepatic enhancement on computed tomography from dose of contrast material and patient weight: proposal of a new formula and evaluation of its accuracy. Radiat Med 19:75–79 Shimizu T, Misaki T, Yamamoto K et al (2000) Helical CT of the liver with computer-assisted bolustracking technology: scan delay of arterial phase scanning and effect of flow rates.
One comparative trial of iso-osmolality (iodixanol) versus low-osmolality (iohexol) CM in patients with both diabetes and renal insufficiency showed a lower incidence of CIN with the use of the iso-osmolality CM . However, a systematic review of available data in high-risk patients from prospective trials involving low- and iso-osmolality CM does not support a benefit of iso-osmolality CM over all other low-osmolality CM . In particular, the data show comparable rates of CIN with the use of iodixanol and iopamidol, another nonionic monomer contrast agent.
Intraarterial versus intravenous, (3) a second CM study within 72 h, and (4) the specific CM used. Since these are potentially modifiable factors, it is important to consider each factor when a high-risk patient has been identified. The risk of CIN is proportional to the volume of contrast administered, with no clear threshold dose . There is an interaction with the patient’s level of renal function. A smaller volume of contrast can cause CIN as the level of renal function (GFR) falls. This has led to the development of a recommended maximum volume of contrast based upon serum creatinine although this has not been extensively validated .