Determination of half-dose depth in skin for soft x-rays
Unlike superficial x-rays, the soft x-rays normally used in dermatologic practice spare unaffected underlying organs during treatment of cutaneous malignancies. However, since the dose with depth from soft x-rays varies markedly, it is important to know this relationship for optimal therapeutic results. The peak kilovoltage, and thus the energy of the beam, is generally selected so that the dose to the base of the lesion is one-half the surface dose. An absorbed dose of 3,400 rads to the surface and a dose of about one-half this amount to the base of most malignant lesions is one standard protocol for optimal therapeutic results. An accurate value of half-depth dose in skin is therefore necessary and is readily obtained from ordinary half-value layer measurements using the technic described.
- Publication Date:
- OSTI Identifier:
- Resource Type:
- Journal Article
- Resource Relation:
- Journal Name: J. Am. Acad. Dermatol.; (United States); Journal Volume: 7:3
- Research Org:
- Department of Environmental Medicine, New York University School of Medicine
- Country of Publication:
- United States
- 62 RADIOLOGY AND NUCLEAR MEDICINE; 63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.; RADIOTHERAPY; DEPTH DOSE DISTRIBUTIONS; SKIN; BIOLOGICAL RADIATION EFFECTS; DOSE-RESPONSE RELATIONSHIPS; RADIATION DOSES; X RADIATION; BIOLOGICAL EFFECTS; BODY; DOSES; ELECTROMAGNETIC RADIATION; IONIZING RADIATIONS; MEDICINE; NUCLEAR MEDICINE; ORGANS; RADIATION DOSE DISTRIBUTIONS; RADIATION EFFECTS; RADIATIONS; RADIOLOGY; SPATIAL DOSE DISTRIBUTIONS; THERAPY 550603* -- Medicine-- External Radiation in Therapy-- (1980-); 560152 -- Radiation Effects on Animals-- Animals
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