Dose parameters of /sup 125/I and /sup 192/Ir seed sources

Journal Article · Sat Jul 01 04:00:00 EDT 1989 · Med. Phys.; (United States)

OSTI ID:5937387

Weaver, K A; Smith, V; Huang, D; Barnett, C; Schell, M C; Ling, C

As mandated by an NCI brachytherapy contract, we measured dosimetric parameters for /sup 192/Ir seeds and two models of /sup 125/I seeds. Measurements were with LiF powder in a water-equivalent phantom. Data were corrected for background, sample mass, and finite detector volume. Selected parameters were also investigated through Monte Carlo calculations. Results are presented in terms of a dose parametrization that is described in detail, and are compared to published data. Our results agreed well with published data for relative quantities such as radial and angular dose dependence. Our measured value for the /sup 192/Ir dose factor was 4.55 cGy(H/sub 2/O) cm/sup 2/ mCi/sup /minus/1/ h/sup /minus/1/, also in good agreement with commonly used values. However, the measured dose factors for /sup 125/I seed models 6702 and 6711 were 1.18 and 1.06 cGy(H/sub 2/O) cm/sup 2/ mCi/sup /minus/1/ h/sup /minus/1/, values well below those in general use.

• Research Organization: Department of Radiation Oncology, University of California, San Francisco, California 94143(US)
• OSTI ID: 5937387
• Journal Information: Med. Phys.; (United States), Journal Name: Med. Phys.; (United States) Vol. 16:4; ISSN MPHYA
• Country of Publication: United States
• Language: English

Related Subjects

61 RADIATION PROTECTION AND DOSIMETRY
655003* -- Medical Physics-- Dosimetry
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
BETA-PLUS DECAY RADIOISOTOPES
DAYS LIVING RADIOISOTOPES
DOSE RATES
DOSIMETRY
ELECTRON CAPTURE RADIOISOTOPES
ELECTRON DOSIMETRY
HEAVY NUCLEI
IMPLANTS
INTERMEDIATE MASS NUCLEI
INTERNAL CONVERSION RADIOISOTOPES
IODINE 125
IODINE ISOTOPES
IRIDIUM 192
IRIDIUM ISOTOPES
ISOMERIC TRANSITION
ISOTOPES
MEDICINE
MOCKUP
MONTE CARLO METHOD
NUCLEAR MEDICINE
NUCLEI
ODD-EVEN NUCLEI
PHANTOMS
PLANNING
RADIATION SOURCE IMPLANTS
RADIATION SOURCES
RADIOISOTOPES
RADIOLOGY
RADIOTHERAPY
STRUCTURAL MODELS
THERAPY