Comparison of the cobalt-60 photon beam dose distributions corrected by three shift-factors for oblique incidence
Journal Article
·
· Med. Phys.; (United States)
A new factor for shifting isodose curves for oblique Co-60 photon beams has been deduced. Like the two other known factors, this shift factor depends on the source-to-surface distance (SSD), the depth dose (D) and the derivative of D with depth. A comparison of corrected dose distributions has been made by using the three shift factors for the 15 x 15-cm/sup 2/ field incident on a surface at 45/sup 0/. In general, the corrected dose distributions given by the new shift factor show the best agreement with the measured depth dose data.
- Research Organization:
- College of Nursing and Medical Technology, Hirosaki University, 66 Hon-cho, Hirosaki-shi, Aomori-ken 036, Japan
- OSTI ID:
- 5315333
- Journal Information:
- Med. Phys.; (United States), Journal Name: Med. Phys.; (United States) Vol. 7:3; ISSN MPHYA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
61 RADIATION PROTECTION AND DOSIMETRY
655003* -- Medical Physics-- Dosimetry
BEAMS
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
COBALT 60
COBALT ISOTOPES
CORRECTIONS
DOSIMETRY
GAMMA DOSIMETRY
INTERMEDIATE MASS NUCLEI
INTERNAL CONVERSION RADIOISOTOPES
ISODOSE CURVES
ISOMERIC TRANSITION ISOTOPES
ISOTOPES
MINUTES LIVING RADIOISOTOPES
NUCLEI
ODD-ODD NUCLEI
PHOTON BEAMS
RADIATION DOSE DISTRIBUTIONS
RADIOISOTOPES
YEARS LIVING RADIOISOTOPES
655003* -- Medical Physics-- Dosimetry
BEAMS
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
COBALT 60
COBALT ISOTOPES
CORRECTIONS
DOSIMETRY
GAMMA DOSIMETRY
INTERMEDIATE MASS NUCLEI
INTERNAL CONVERSION RADIOISOTOPES
ISODOSE CURVES
ISOMERIC TRANSITION ISOTOPES
ISOTOPES
MINUTES LIVING RADIOISOTOPES
NUCLEI
ODD-ODD NUCLEI
PHOTON BEAMS
RADIATION DOSE DISTRIBUTIONS
RADIOISOTOPES
YEARS LIVING RADIOISOTOPES