A computer-controlled radiation therapy machine for pelvic and para-aortic nodal areas

A computer-controlled radiation therapy technique has been developed to treat cancer of the uterine cervix that has extended to the pelvic and pare-aortic lymph nodes. During five longitudinal scans with a 4 cm wide 8 MV X ray beam, conformation of the high dose region to the target volume was achie...

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Veröffentlicht in:Int. J. Radiat. Oncol., Biol. Phys.; (United States) Biol. Phys.; (United States), 1981, Vol.7 (1), p.61-70
Hauptverfasser: Chin, Lee M., Kijewski, Peter K., Svensson, Göran K., Chaffey, John T., Levene, Martin B., Bjärngard, Bengt E.
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Sprache:eng
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Zusammenfassung:A computer-controlled radiation therapy technique has been developed to treat cancer of the uterine cervix that has extended to the pelvic and pare-aortic lymph nodes. During five longitudinal scans with a 4 cm wide 8 MV X ray beam, conformation of the high dose region to the target volume was achieved primarily by varying the other field dimensions. Treatment planning and dose calculation were performed in three dimensions. Conventional two-dimensional planning in a series of transverse planes through the patient was combined with a mathematical normalization of dose in the longitudinal direction to attain uniform dose throughout the target volume and to fulfill criteria for protection of critical organs. The resulting dose distributions were compared, in detail, with those resulting from conventional treatment techniques. It was concluded that the computer-controlled therapy scheme offered the potential of reducing the probability of complications, for the same target dose, by lowering the doses to small bowel, duodenum, kidneys, liver and spinal cord.
ISSN:0360-3016
1879-355X
DOI:10.1016/0360-3016(81)90061-4