Radiation from Computed Tomography (CT) is now the major contributor to population
radiation dose. Despite controversy around the dose-effect relationship of radiation from
CT, the linear non-threshold (LNT) theory is endorsed by many authorities, and
constitutes the basis of cancer risk estimates. The purpose of this study was (1) a
literature review of radiobiological theories, and methods of dose saving stategies in
CT; (2) to highlight the importance of dose saving in CT, and to demonstrate how dose
can be saved in a radiology department: Following a 40% reduction in reference X-ray
tube current for a CT of the urinary tract, the effecitve dose and estimated lifetime
attributable risk of incident cancer due to this CT in a group (n=103) were reduced by
37% and 38% in an age and sex-matched group respectively. The literature review
showed that the public health implications of CT radiation exposure remain uncertain. / Health Studies / M.A. (Public Health)
| Identifer | oai:union.ndltd.org:netd.ac.za/oai:union.ndltd.org:unisa/oai:umkn-dsp01.int.unisa.ac.za:10500/6085 |
| Date | 02 1900 |
| Creators | Gerstenmaier, Jan Frank |
| Contributors | Human, S.P., Seebregts, C.J. |
| Source Sets | South African National ETD Portal |
| Language | English |
| Detected Language | English |
| Type | Dissertation |
| Format | 1 online resource (x, 66 leaves) : ill. |
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