FLUOROD DOSIMETRY CLOSE TO RADIUM AND COBALT-60 SOURCES

Journal Article · Mon Jan 01 04:00:00 EST 1962 · Radiology (U.S.)

OSTI ID:4803715

Friedman, M; Hodara, M; Hine, G J

Point-dose measurements were made around a variety of radium and cobalt- 60 solid discrete sources with the aid of fluorods (miniature glass rod dosimeters). The measured values are in good agreement with the calculated values in the literature. With the fluorod, dose distributions in regions close to radioactive sources could be measured to provide data not previously reported. Radiation fields inside of and around multiple source implants were mapped in detail, and information of clinical value was derived. Whereas the hot spot close to a single radium needle was intense, the presence of additional sources in a multiple needle implant was found to reduce the relative dose rate at this point. In a volume implant consisting of three needles crossed at both inactive ends, the actual shape of the irradiated volume appears as a spheroid, with one diameter larger than that of the hypothetical cuboid on which the implanted volume was originally constructed. Dose distributions around small (3 to 5 mm diameter) Co/sup 60/ spheres were found to approximate the inverse-square-law distribution. For a larger sphere (20 mm diameter), fluorod measurements coincided with the data calculated with Mayneord's formula for extended sources. Dose distributions around a few multiple-source brachytherapy devices Here measured. (auth)

• Research Organization: Hospital for Joint Diseases, New York; Veterans Administration Hospital, Boston
• NSA Number: NSA-16-006658
• OSTI ID: 4803715
• Journal Information: Radiology (U.S.), Journal Name: Radiology (U.S.) Vol. Vol: 78; ISSN RADLA
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

COBALT 60
CONFIGURATION
DISTRIBUTION
DOSEMETERS
FLUORESCENCE
GLASS
HEALTH AND SAFETY
HOT SPOT
IRRADIATION
MATHEMATICS
MEASURED VALUES
QUANTITY RATIO
RADIATION DOSES
RADIATION SOURCES
RADIOTHERAPY
RADIUM
SOLIDS
SPHERES
VOLUME