Radiation Dose in X-ray Computed Tomography (CT) Imaging

概要

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The purpose of this presentation is to discuss radiation dose in X-ray CT Imaging. Due to significant technological advances, new clinical applications have been developed in CT such as cardiac imaging, dual energy imaging and perfusion imaging. As a consequence, CT now contributes 50% of medical radiation exposure and 25% of the total population radiation exposure in the United States. This presentation will first describe general radiation dose terms as well as those specifically related to CT, such as the Computed Tomography Dose Index (CTDI). Methods to estimate patient dose will also be described, with specific discussion of the differences between CTDI and patient dose, methods to estimate patient dose that take into account patient size (the Size Specific Dose Estimate or SSDE) and methods to estimate dose to the fetus of a pregnant patient. Finally, recent advances that allow reduction in radiation dose will also be described.
公益社団法人日本放射線技術学会の論文
2012-04-01