System for intraoperative electron beam radiotherapy using remot

Details System for intraoperative electron beam radiotherapy using remot System for intraoperative electron beam radiotherapy using remot

1989-04-07

1992-11-10

Shay, David M.

Surgery

Miscellaneous

600 1, 606 34, A61N 510

Patent

active

051615460

ABSTRACT:
A microtron-generated electron beam may be selectively routed through an extended electron beam transport system to a remotely located intraoperative radiotherapy (IORT) facility. The beam current is preferably limited to a value (e.g., 100 nanoamperes) so as to avoid the necessity for overly extensive shielding along the beam transport system and at the remote therapy site while yet being sufficiently high to provide effective treatments. The intraoperative radiotherapy gantry and treatment head are preferably optimized for just this purpose and is thus considerably simplified over conventional electron/photon therapy gantries and treatment heads. In addition, the electron beam output of the microtron may be utilized on a time-shared basis with a plurality of similar and/or conventional electron/proton therapy systems.

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patent: 3547074 (1967-04-01), Horschfeld
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patent: 3842279 (1974-10-01), Schumacher
"Radiation therapy and surgery" by Tepper et al; Cancer Treatment Symposia, vol. 1, 1984 pp. 111-117.
"Characteristics of an MM 22 Medical Microtron 6-MV photon beam" by George Med. Phys. 11-(6), Nov./Dec. 1984, pp. 862-865.
"Clinical Experience with the 22-MeV Microtron at the National Cancer Center Hospital" by Egawa et al Jpn. J. Clin. Oncol. 1984, 14(4) 613-622.
"A 22 MeV Microtron for Radiation Therapy" by Svensson et al. Acta Radiologica Therapy Physics Biology 16 (1977) Fasc. 2 Apr. pp. 145-156.

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