Improvement of small-field penumbra and dose distributions on a 4 MV accelerator
Journal Article
·
· Int. J. Radiat. Oncol., Biol. Phys.; (United States)
The penumbra and dose distributions for small x ray fields from a 4 MV accelerator, designed for 80 cm source-to-surface (SSD) but used at 100 cm SSD, were observed to be similar to those obtained from cobalt-60 units. Penumbra was reduced and flatter isodose curves were obtained by the addition of tungsten trimmers at a distance of 48 cm from the x ray source. This stratagem improves the definition of irradiation volume of small fields which are common in the treatment of lesions in the head and neck.
- Research Organization:
- Yale Univ., New Haven, CT
- OSTI ID:
- 6143155
- Journal Information:
- Int. J. Radiat. Oncol., Biol. Phys.; (United States), Journal Name: Int. J. Radiat. Oncol., Biol. Phys.; (United States) Vol. 7:7; ISSN IOBPD
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
43 PARTICLE ACCELERATORS
430100* -- Particle Accelerators-- Design
Development
& Operation
550603 -- Medicine-- External Radiation in Therapy-- (1980-)
62 RADIOLOGY AND NUCLEAR MEDICINE
ACCELERATORS
ALLOYS
BODY
BODY AREAS
COLLIMATORS
ELECTROMAGNETIC RADIATION
HARD X RADIATION
HEAD
HYDROGEN COMPOUNDS
IONIZING RADIATIONS
ISODOSE CURVES
LINEAR ACCELERATORS
MEDICINE
NECK
NUCLEAR MEDICINE
OXYGEN COMPOUNDS
RADIATION DOSE DISTRIBUTIONS
RADIATIONS
RADIOLOGY
RADIOTHERAPY
SPATIAL DOSE DISTRIBUTIONS
THERAPY
TUNGSTEN ALLOYS
WATER
X RADIATION
430100* -- Particle Accelerators-- Design
Development
& Operation
550603 -- Medicine-- External Radiation in Therapy-- (1980-)
62 RADIOLOGY AND NUCLEAR MEDICINE
ACCELERATORS
ALLOYS
BODY
BODY AREAS
COLLIMATORS
ELECTROMAGNETIC RADIATION
HARD X RADIATION
HEAD
HYDROGEN COMPOUNDS
IONIZING RADIATIONS
ISODOSE CURVES
LINEAR ACCELERATORS
MEDICINE
NECK
NUCLEAR MEDICINE
OXYGEN COMPOUNDS
RADIATION DOSE DISTRIBUTIONS
RADIATIONS
RADIOLOGY
RADIOTHERAPY
SPATIAL DOSE DISTRIBUTIONS
THERAPY
TUNGSTEN ALLOYS
WATER
X RADIATION