Modification of a standard cobalt-60 unit for total body irradiation at 150 cm SSD

Journal Article · Fri Jun 01 00:00:00 EDT 1984 · Int. J. Radiat. Oncol., Biol. Phys.; (United States)

DOI:https://doi.org/10.1016/0360-3016(84)90397-3· OSTI ID:6865393

Peters, V G; Herer, A S

A cobalt-60 teletherapy unit has been modified to permit total body irradiation (TBI) with a vertical beam in a conventional treatment room. This technique has been implemented at low cost using a few easily made accessories. Removal of the adjustable collimator assembly provides a field 2.3 meters in diameter at 150 cm SSD. A copper flattening filter has been constructed to improve beam uniformity and remove electron contamination. Machine set up time for TBI requires less than 15 minutes and does not affect the routine clinical use of the unit. A dose rate of 32 cGy per minute (midplane) is attainable in a 20 cm thick patient. The dosimetry and technical aspects are presented in this paper.

• Research Organization: Ontario Cancer Treatment and Research Foundation, Hamilton
• OSTI ID: 6865393
• Journal Information: Int. J. Radiat. Oncol., Biol. Phys.; (United States), Vol. 10:6
• Country of Publication: United States
• Language: English

Related Subjects

62 RADIOLOGY AND NUCLEAR MEDICINE
61 RADIATION PROTECTION AND DOSIMETRY
RADIATION DOSE DISTRIBUTIONS
CALCULATION METHODS
WHOLE-BODY IRRADIATION
GAMMA DOSIMETRY
BUILDUP
CALIBRATION
COBALT 60
GAMMA RADIATION
LITHIUM FLUORIDES
PHANTOMS
ALKALI METAL COMPOUNDS
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
COBALT ISOTOPES
DOSIMETRY
ELECTROMAGNETIC RADIATION
EXTERNAL IRRADIATION
FLUORIDES
FLUORINE COMPOUNDS
HALIDES
HALOGEN COMPOUNDS
INTERMEDIATE MASS NUCLEI
INTERNAL CONVERSION RADIOISOTOPES
IONIZING RADIATIONS
IRRADIATION
ISOMERIC TRANSITION ISOTOPES
ISOTOPES
LITHIUM COMPOUNDS
LITHIUM HALIDES
MINUTES LIVING RADIOISOTOPES
MOCKUP
NUCLEI
ODD-ODD NUCLEI
RADIATIONS
RADIOISOTOPES
STRUCTURAL MODELS
YEARS LIVING RADIOISOTOPES
550603* - Medicine- External Radiation in Therapy- (1980-)
655003 - Medical Physics- Dosimetry