Abstract: This chapter discusses some of the methods and terms used to represent dosimetry for diagnostic nuclear medicine procedures, which is largely the result of internal exposure, and computed tomography procedures, which involve external radiation exposure. The calculation of internal dosimetry relies on an understanding of the different types of half-lives used to describe radiopharmaceuticals. Several systems are available for internal dosimetry calculations. Three of the more commonly used systems are the International Committee for Radiation Protection, Radiologic Dose Assessment Resource, and Medical Internal Radiation Dose. Absorbed doses from computed tomography (CT) imaging are approximated by scanning phantoms containing dosimeters. CTDI values estimate the dose at point within a single slice of the phantom, but do not take into account the actual length of the CT scan. Mathematical simulations of CT scans using computerized models of a body combined with scanner specific dose measurements are used to estimate organ doses.
Publication Year: 2021
Publication Date: 2021-11-26
Language: en
Type: other
Indexed In: ['crossref']
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