Imaging of spatial radiation dose distribution in agarose gels using magnetic resonance
Radiation dose distributions are conventionally measured using ionization chambers or diodes in liquid phantoms, or in two dimensions using film. This work describes a new application of magnetic resonance imaging to radiation dose planning. Agarose gels containing ferrous sulfate, sulfuric acid, and benzoic acid have been irradiated with /sup 137/Cs gamma rays and 6-14 MeV electrons, to doses of up to 20 Gy. The dose distributions have been imaged by magnetic resonance, making use of the effect on the T1 proton relaxation times of the radiolytic Fe/sup 3 +/. The image intensity was proportional to doses of up to 10 Gy, and images were stable for at least 24 h postirradiation. The G value for Fe/sup 3 +/ production was about 100 (molecules per 100 eV absorbed).
- Research Organization:
- Rutgers Univ., New Brunswick, NJ
- OSTI ID:
- 6263385
- Journal Information:
- Med. Phys.; (United States), Journal Name: Med. Phys.; (United States) Vol. 14:3; ISSN MPHYA
- Country of Publication:
- United States
- Language:
- English
Similar Records
Dosimetry of {sup 60}Co and {sup 192}Ir gamma-irradiated agarose gels by proton relaxation time measurement and NMR imaging, in a 0-100 Gy dose range
Imaging of radiation dose by visible color development in ferrous-agarose-xylenol orange gels
Related Subjects
61 RADIATION PROTECTION AND DOSIMETRY
62 RADIOLOGY AND NUCLEAR MEDICINE
655003* -- Medical Physics-- Dosimetry
ALKALI METAL ISOTOPES
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
CESIUM 137
CESIUM ISOTOPES
COLLOIDS
DIAGNOSTIC TECHNIQUES
DISPERSIONS
DISTRIBUTION
ELECTROMAGNETIC RADIATION
ELECTRONS
ELEMENTARY PARTICLES
FERMIONS
GAMMA RADIATION
GELS
IMAGES
IONIZING RADIATIONS
ISOTOPES
LEPTONS
MAGNETIC RESONANCE
MOCKUP
NMR IMAGING
NUCLEAR MAGNETIC RESONANCE
NUCLEI
ODD-EVEN NUCLEI
PHANTOMS
RADIATION DOSE DISTRIBUTIONS
RADIATIONS
RADIOISOTOPES
RESONANCE
SPATIAL DISTRIBUTION
STRUCTURAL MODELS
YEARS LIVING RADIOISOTOPES