Average radiation doses in a standard head examination for 250 CT systems

Approximately 250 computed tomography (CT) systems were surveyed in a nationwide study to determine the average radiation dose resulting from a typical adult head procedure. The multiple scan average dose (MSAD) was selected as the dose descriptor. For the typical adult CT head procedure, the MSAD w...

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Bibliographic Details
Published inRadiology Vol. 163; no. 1; p. 263
Main Authors McCrohan, J L, Patterson, J F, Gagne, R M, Goldstein, H A
Format Journal Article
LanguageEnglish
Published United States 01.04.1987
Subjects
Head - diagnostic imaging
Humans
Models, Structural
Radiation Dosage
Radiation Monitoring
Radiation Protection
Tomography, X-Ray Computed
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Summary:Approximately 250 computed tomography (CT) systems were surveyed in a nationwide study to determine the average radiation dose resulting from a typical adult head procedure. The multiple scan average dose (MSAD) was selected as the dose descriptor. For the typical adult CT head procedure, the MSAD was generally within 2.2-6.8 rads (22-68 mGy). Variations in dose by a factor of two or more were often seen for a given manufacturer and model. These dose ranges indicate a potential to reduce dose by carefully selecting imaging techniques. Overall, variations in dose can result from differences in the user's choice of technique (desired image quality) or from actual differences in scanner performance (caused by differences in collimation, filtration, or geometry). To use CT appropriately, a facility should consider dose as well as image quality in selecting optimal techniques for typical modes of operation.
ISSN:0033-8419
DOI:10.1148/radiology.163.1.3823446