Rbe
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Rbe of Some Sodium, Water and Bioelectric Parameters of Gastrointestinal Absorption
Rats and dogs were exposed to fast neutron and to 250 kvp X irradiation (rats) or to 1000 kvp X irradiation (dogs). Animals were exposed bilaterally to the whole body and depth dosimetry evaluated in each case. In the rat, 7 days after irradiating, bioelectric activity is markedly reduced from normal in stomach but not at the lower gastrointestinal level. An RBE value of 2-3 can be established for delayed reduction in gastric bioelectric activity, and this effect is readily demonstrated at neutron doses of 160 rad (1st collision). In the dog, 3 days after irradiating, the unidirectional transfer rates from plasma-to-lumen are decreased for sodium and for water. This occurs after X-irradiation at 1200 r (air dose) and after neutron irradiation at either 300 rad or 600 rad (1st collision). However, at 600 r X-irradiation doses (air) these transfer rates do not show a decrease, and tend in the opposite direction. An RBE value lying between 2 and 6 can be inferred for the delayed reduction in plasma-to-lumen transfers. (Author).
Proton and Charged Particle Radiotherapy
Author: Thomas F. De Laney
language: en
Publisher: Lippincott Williams & Wilkins
Release Date: 2008
This volume is the first comprehensive and practical clinical reference on proton and charged particle radiotherapy. The first half of the book explains the treatment delivery systems used, offers detailed guidance on treatment planning techniques, examines key clinical issues in proton radiotherapy, and reviews recent experience with heavier charged particle radiotherapy. The second half of the book offers "how-to" information on treatment of pediatric tumors, lymphomas, and tumors of the central nervous system, eye, skull base, cervical spine, bone and soft tissue, paranasal sinus, nasal cavity, nasopharynx, oropharynx, oral cavity, salivary glands, prostate, lung, gastrointestinal tract, female reproductive tract, and breast. More than 100 full-color illustrations complement the text.
