THE TUMOROGENIC ACTION OF BETA RADIATION ON THE RAT SKIN. Progress Report
Progress is reported in studies on the mechanism of tumor formation by ionizing radiation using the induction of skin tumors in the rat by BETA radiation as an experimental model. The BETA ray sources were prepared by drpping filter paper in P/sup 32/ isotope solution, blotting and drying the paper, and then inserting the sources in a thin plastic envelope. Dosage was measured with stacks of Dupont x-ray film processed in standard x-ray chemical developer and fixer solutions. Photographic density measurements across the exposed regions of film were done with the use of a Photovolt densitometer and a Leitz Ortholux microscope. Variations in the number, size, and shape of the irradiated areas was accomplished by interposing masks having suitable apertures between the skin and the BETA source. Data are presented graphically on the relation of tumor incidence to the size of the irradiated area of skin at given dose levels. (C.H.)
- Research Organization:
- New York Univ., New York. Coll. of Medicine
- NSA Number:
- NSA-16-011464
- OSTI ID:
- 4807747
- Report Number(s):
- TID-15118
- Country of Publication:
- United States
- Language:
- English
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