Broad beam and narrow beam attenuation in Lipowitz's metal
Journal Article
·
· Med. Phys.; (United States)
Attenuation properties of Lipowitz's metal have been studied for narrow and broad beams of cobalt-60 gamma rays and 4-10 MV x-rays. The measured transmitted fraction for geometries used in radiotherapy depends on the field size and depth of measurement. Therefore a calculation of dose for partially attenuated beams based on narrow beam attenuation coefficients can cause large errors in dosimetry. Our simple calculation of transmitted fractions based on primary attenuation and scattered radiation agrees quite well with the measured data for therapeutic geometries. Also given is a table for linear, mass attenuation, and mass energy absorption coefficients of Lipowitz's metal in the photon energy range from 10 keV to 10 MeV.
- Research Organization:
- McGill Univ., Montreal, Quebec
- OSTI ID:
- 6780143
- Journal Information:
- Med. Phys.; (United States), Journal Name: Med. Phys.; (United States) Vol. 1; ISSN MPHYA
- Country of Publication:
- United States
- Language:
- English
Similar Records
Attenuation in Lipowitz's metal of x rays produced at 2, 4, 10, and 18 MV and gamma rays from cobalt-60
Broad beam attenuation of cobalt-60 gamma rays and 6-, 18-, and 25-MV x rays by lead
Attenuation in very narrow photon beams
Journal Article
·
Wed Feb 28 23:00:00 EST 1979
· Med. Phys.; (United States)
·
OSTI ID:6175146
Broad beam attenuation of cobalt-60 gamma rays and 6-, 18-, and 25-MV x rays by lead
Journal Article
·
Tue Dec 31 23:00:00 EST 1985
· Med. Phys.; (United States)
·
OSTI ID:5738217
Attenuation in very narrow photon beams
Journal Article
·
Mon May 01 00:00:00 EDT 1989
· Radiat. Res.; (United States)
·
OSTI ID:5717605
Related Subjects
61 RADIATION PROTECTION AND DOSIMETRY
655003* -- Medical Physics-- Dosimetry
ALLOYS
ATTENUATION
BACKSCATTERING
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
BIOPHYSICS
CALCULATION METHODS
COBALT 60
COBALT ISOTOPES
DOSES
DOSIMETRY
ELECTROMAGNETIC RADIATION
INTERMEDIATE MASS NUCLEI
INTERNAL CONVERSION RADIOISOTOPES
IONIZING RADIATIONS
ISOMERIC TRANSITION ISOTOPES
ISOTOPES
MEDICINE
MINUTES LIVING RADIOISOTOPES
NUCLEAR MEDICINE
NUCLEI
ODD-ODD NUCLEI
RADIATION DOSE DISTRIBUTIONS
RADIATION DOSES
RADIATION PROTECTION
RADIATIONS
RADIOISOTOPES
RADIOLOGY
RADIOTHERAPY
SCATTERING
THERAPY
X RADIATION
YEARS LIVING RADIOISOTOPES
655003* -- Medical Physics-- Dosimetry
ALLOYS
ATTENUATION
BACKSCATTERING
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
BIOPHYSICS
CALCULATION METHODS
COBALT 60
COBALT ISOTOPES
DOSES
DOSIMETRY
ELECTROMAGNETIC RADIATION
INTERMEDIATE MASS NUCLEI
INTERNAL CONVERSION RADIOISOTOPES
IONIZING RADIATIONS
ISOMERIC TRANSITION ISOTOPES
ISOTOPES
MEDICINE
MINUTES LIVING RADIOISOTOPES
NUCLEAR MEDICINE
NUCLEI
ODD-ODD NUCLEI
RADIATION DOSE DISTRIBUTIONS
RADIATION DOSES
RADIATION PROTECTION
RADIATIONS
RADIOISOTOPES
RADIOLOGY
RADIOTHERAPY
SCATTERING
THERAPY
X RADIATION
YEARS LIVING RADIOISOTOPES