Total body irradiation with a sweeping {sup 60}Cobalt beam

Journal Article · Sat Sep 30 04:00:00 EDT 1995 · International Journal of Radiation Oncology, Biology and Physics

DOI:https://doi.org/10.1016/0360-3016(95)00164-T· OSTI ID:437134

Hussein, S; El-Khatib, E ^[1]

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1. British Columbia Cancer Agency, Vancouver (Canada)

This article describes the physical, technical, and dosimetric aspects of total body irradiation (TBI). The continuous head swivel motion of a standard {sup 60}Cobalt unit has been used to obtain a sweeping beam that encompases the entire length of the patient in TBI. A perspex beam flattener designed to remove the inverse square fall-off in beam intensity along the sweep axis provides a 90% field length of 200 cm in air at a treatment source-to-skin distance of 160 cm. The anterior-posterior parallel pair setup permits accurate placement of customized lead compensators to limit the dose to lungs. Measured beam profiles, dose buildup curves, and percentage depth dose for the technique are presented. With compensators in place, the variation in lung dose is shown to be within {plus_minus}5% of the prescribed tumor dose. 10 refs., 5 figs.

• OSTI ID: 437134
• Journal Information: International Journal of Radiation Oncology, Biology and Physics, Journal Name: International Journal of Radiation Oncology, Biology and Physics Journal Issue: 2 Vol. 33; ISSN IOBPD3; ISSN 0360-3016
• Country of Publication: United States
• Language: English

Related Subjects

55 BIOLOGY AND MEDICINE
BASIC STUDIES
56 BIOLOGY AND MEDICINE
APPLIED STUDIES
BIOLOGICAL RADIATION EFFECTS
COBALT 60
DEPTH DOSE DISTRIBUTIONS
DOSIMETRY
EVALUATION
LUNGS
PATIENTS
RADIATION DOSES
RADIOTHERAPY
TISSUE DISTRIBUTION
VARIATIONS
WHOLE-BODY IRRADIATION