Organ doses and associated cancer risks for computed tomography examinations of the thoracic region
The use of computed tomography is increasing rapidly and doses are not negligible especially when medical procedures require more than one scan. The purpose of the present study was to measure doses in an anthropomorphic Rando phantom during a standard and low dose computed tomography proto...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
VINCA Institute of Nuclear Sciences
2018-01-01
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| Series: | Nuclear Technology and Radiation Protection |
| Subjects: | |
| Online Access: | http://www.doiserbia.nb.rs/img/doi/1451-3994/2018/1451-39941801100M.pdf |
| Summary: | The use of computed tomography is increasing rapidly and doses are not
negligible especially when medical procedures require more than one scan.
The purpose of the present study was to measure doses in an anthropomorphic
Rando phantom during a standard and low dose computed tomography protocol of
the thorax and to estimate risks of radiation induced cancer for adult
patients that undergo multiple computed tomography scans of the thorax.
Thermoluminescent and radiophotoluminescent dosimeters were used for dose
measurements. Radiation risks of cancer incidence, in the form of lifetime
attributable risk, were estimated using the BEIR VII model. For five
exposures with the standard protocol mean organ doses were 94 mGy (breast),
85 mGy (stomach), 85 mGy (thyroid), 78 mGy (lung), 52 mGy (liver), and 16
mGy (colon). Associated lifetime attributable risk were found to be up to
0.401 % (401 breast cancers per 100 000 exposed patients) and 0.116 % (116
lung cancers per 100 000 exposed patients) for female and male,
respectively. A low dose protocol reduces doses (and risks) by the average
factor of 5 and therefore the use of a low dose protocol is recommended
whenever it is medicaly justified. |
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| ISSN: | 1451-3994 1452-8185 |