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Published on: July 3, 2014
Selection of techniques for orthovoltage radiation therapy
1Division of Radiation Oncology, Mayo Clinic/Foundation, Rochester, MN 55905.
Abstract:
Selection of appropriate orthovoltage radiation techniques (peak kilovoltage plus total filtration) may be based on the following factors: (a) central axis percent depth dose, (b) exposure rate, (c) sensitivity of backscatter factor to size of a blocked field, (d) differential bone energy absorption, (e) penumbra characteristics, and (f) field uniformity. An analysis of these factors as a function of beam quality (i.e. half-value layer) has been performed and a recommendation of a minimal number of techniques (consistent with widely available techniques) is presented.
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An X-ray, or radiograph, is a non-invasive method that uses ionizing radiation to take images of internal structures. It is mainly used in cardiac imaging to examine the heart, lungs, and major blood vessels, aiming to identify abnormalities in the heart's size, shape, and position, such as heart failure, congenital defects, and vascular...

