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Dose descriptors for computed tomography
Author(s) -
Spokas John J.
Publication year - 1982
Publication title -
medical physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.473
H-Index - 180
eISSN - 2473-4209
pISSN - 0094-2405
DOI - 10.1118/1.595072
Subject(s) - computed tomography , image guided radiation therapy , medical imaging , computed tomography laser mammography , tomography , nuclear medicine , medical physics , medicine , preclinical imaging , radiology , microbiology and biotechnology , biology , in vivo
A weakness in the dose descriptor, the computed tomography dosimetry index, is discussed and an alternate descriptor is proposed. The new descriptor, the equivalent rectangular width, conveniently expresses the spatial spread of dose and is simply derived from customary dose measurements. A measure of performance, which expresses the relative size of the volume being imaged with respect to the volume receiving the dose, is suggested for computed tomography.