Comparison of Dose Patterns in a Dog Exposed to Neutrons and X-Rays

• Published in: Radiation research 1967-11, Vol.32 (3), p.404-416
• Main Authors: Wingate, Catharine L., Page, N. P., Ainsworth, E. J.
• Format: Article
• Language: English
• Subjects: Abdomen; Animals; Bones; Cadavers; Dogs; Dosimetry; Fluorides; Lithium; Luminescent Measurements; Lungs; Models, Biological; Neutron spectra; Neutrons; Radiation; Radiation dosage; Radiometry; Radiotherapy; Space life sciences; Sulfur
• ISSN: 0033-7587; 1938-5404
• DOI: 10.2307/3572256

Dose distributions with depth in a dog cadaver and in a cylindrical phantom have been obtained for 1-MVp X-rays and for mixed neutron and γ-radiation from a reactor. Measurement of γ-ray or X-ray dose was made with LiF thermoluminescence dosimeters, while neutron dose was obtained from the activation of small sulfur disks calibrated against tissue-equivalent ionization chambers. Penetration of the 1-MVp X-rays is considerably higher than that of the reactor neutrons. Depth-dose distributions for the 1-MVp X-rays do not differ significantly in various cross sections of the body, contrary to results for 250-kVp X-rays reported by other workers. Local distortion of isodose curves due to bone can be discerned. For the reactor beam administered unilaterally, the energy deposition is strongly asymmetric. Isodose configurations for the neutron and γ-ray components differ substantially. However, only minor variations were found in the depth-dose curves for different sections through the dog cadaver in spite of differences in composition and density. Distortion of dose curves in bony regions is not discernible, but small differences in the neutron and γ-ray components are noticeable in the lung.