Dynamic table/shield apparatus and method of using same in movin

Details Dynamic table/shield apparatus and method of using same in movin Dynamic table/shield apparatus and method of using same in movin

1997-04-25

1998-09-22

Lacyk, John P.

Surgery

Radioactive substance applied to body for therapy

A61N 500

Patent

active

058107070

ABSTRACT:
A dynamic table/shield apparatus contains a movable treatment table and at least one shielding block which is movable relative to the table. The apparatus effects total body irradiation treatment of a body disposed on the table while completely shielding, throughout the treatment time, a midplane of a predetermined body part from a radiation beam emitted from a radiation source during the treatment. During the treatment, the table and body are moved in a first direction at a first velocity V.sub.1 through a radiation field, and the shielding block is moved relative to the table at a second velocity V.sub.2 in a second direction opposite of the first direction. The second velocity is equal to (V.sub.1)(b/a), wherein "V.sub.1 " is the first velocity, "b" is the perpendicular distance between the the shielding block and the midplane of the body part, and "a" is the perpendicular distance between the midplane of the body part and the radiation source. The apparatus preferably further contains a movable verification film component for confirming the accuracy of the shielding of the predetermined body part.

REFERENCES:
Connors S., Scrimger, J., Logus, W., Johnson, L., Schartner, E.: Development of a translating bed for total body irradiation, Medical Dosimetry 13:195-199, 1988.
Umek, B., Zwitter, M., Habic, H.: Total body irradiation with translation method, Radiotherapy and Oncology 38:253-255, 1996.
Quast, U.: Physical treatment plannin of total body irradiation: Patient translation and beam-zone method, Medical Physics 12(5):567-574, 1985.
Quast, U.: Total body irradiation -review of treatment of treatment techniques in Europe, Radiotherapy and Oncology 9:91-106, 1987.

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