Effects of 15-MeV Neutrons on Capillary Endothelium in the Rat

Journal Article · Mon Oct 01 04:00:00 EDT 1973 · Radiation Research

DOI:https://doi.org/10.2307/3573802· OSTI ID:4422601

Broerse, J. J.; Reinhold, H. S.; Buisman, G. H.; Engels, A. C.

For the application of fast neutrons in radiotherapy, it is important to evaluate the responses of various types of normal tissues in comparison with responses of experimental tumors after fastneutron and x-irradiation. For rapidly proliferating cell-renewal systems such as the intestinal tissue, skin, and the immunohematopoietic system, extensive information is available on the RBE tron beams. Only recently have quantitative studies been initiated on the response of slowly proliferating cell-renewal systems such as the vascular endothelium, which are considered to be dose limiting in clinical radiotherapy. Results concerning the vascular proliferation in subcutaneous tissue after irradiations with collimated beams of 300-kV x rays and 15-MeV neutrons are presented. For neutron doses between 250 and 500 rad, it has been observed that the RBE varies only slightly from 1.9 to 1.8. These studies indicate that the RBE values for effects of 15-MeV neutrons on the capillary endothelium are similar to the RBE values obtained for skin and intestinal epithelium and confirm that, in this dose range, the overall gain factor RBE/sub tumor/,/RBE/sub normal tissue/ will be 1.2 to 1.3. (auth

• Research Organization: Radiobiological Inst. TNO, Rijswijk, Netherlands
• Sponsoring Organization: USDOE
• NSA Number: NSA-29-000716
• OSTI ID: 4422601
• Journal Information: Radiation Research, Journal Name: Radiation Research Journal Issue: 1 Vol. 56; ISSN 0033-7587
• Publisher: Radiation Research Society
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

*CAPILLARIES-- BIOLOGICAL RADIATION EFFECTS
*CELL PROLIFERATION-- BIOLOGICAL RADIATION EFFECTS
*NEUTRONS-- RBE
N48510 --Life Sciences--Radiation Effects on Animals--Man
N48520* --Life Sciences--Radiation Effects on Animals-- Vertebrates
PHOTON BEAMS
RADIATION DOSES
RADIOTHERAPY
RATS
TISSUES
X RADIATION