Advances in MDCT, An Issue of Radiologic Clinics by Vahid Yaghmai MD, Dushyant V Sahani MD

By Vahid Yaghmai MD, Dushyant V Sahani MD

Regardless of technical advances utilizing MR and the emergence of puppy imaging, CT remains to be a regularly used imaging modality that has no longer stood nonetheless whereas others have thrived. Advances in CT have persevered apace with different modalities that have taken CT into new parts of imaging that quite a few brief years in the past it might no longer method. With the appearance of 64-slice CT, a better variety of pictures should be taken in a miles faster time period. using CT perfusion within the mind and stomach are reviewed during this factor. innovative ideas akin to 4D CT and twin power CT may be mentioned, in addition to CT purposes for imaging of the coronary arteries and cardiac valves.

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Additionally, each CT examination must be appropriate for the individual patient. Justification is a shared responsibility between requesting clinicians and radiologists. For medical exposures, the primary tasks of the imaging community are to work with ordering clinicians to direct patients to the most appropriate imaging modality for the required diagnostic task, and to ensure that all technical aspects of the examination are optimized, such that the required level of image quality can be obtained while keeping the doses as low as possible.

38,44–47 In addition, it is also possible to reduce dose for projections of limited interest. Strategies for Reducing Radiation Dose in CT Fig. 1. Graph (top) of relative attenuation values as a function of table position and associated body region (bottom) shows almost three orders of magnitude of variation in attenuation, according to body region and projection angle. (From McCollough CH, Brue sewitz MR, Kofler JM Jr. CT dose reduction and dose management tools: overview of available options.

3. Donnelly LF, Emery KH, Brody AS, et al. Minimizing radiation dose for pediatric body applications of single-detector helical CT: strategies at a large children’s hospital. AJR Am J Roentgenol 2001;176: 303–6. 4. Brenner DJ, Elliston CD, Hall EJ, et al. Estimated risks of radiation-induced fatal cancer from pediatric CT. AJR Am J Roentgenol 2001;176:289–96. 5. The Associated Press. Report links increased cancer risk to CT scans. The New York Times. November 29, 2007. 6. Khamsi R. CT scan radiation can equal nuclear bomb exposure.

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Advances in MDCT, An Issue of Radiologic Clinics by Vahid Yaghmai MD, Dushyant V Sahani MD
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