Gear cutting – milling – or planing – Milling – With regulation of operation by templet – card – or other...
Patent
1984-08-06
1986-11-18
Lowe, James
Gear cutting, milling, or planing
Milling
With regulation of operation by templet, card, or other...
33 2309, 128659, 264222, 409 90, 409 93, 409103, B23C 116, B29C 3338
Patent
active
046232885
ABSTRACT:
Apparatus for fabricating a compensating filter for use in radiation therapy includes a stylus for tracing the profile of a surface portion of a patient and a cutter for cutting a form. The stylus and cutter are positioned on first and second guides which are connected by a tie bar. A plurality of linkages translate movement of the stylus along its guide to the cutter along its guide. A mold is cut in the form which is filled with compensating material for forming the filter. The ratio of movement of the stylus to the cutter is established by the linkages in accordance with the ratio of radiation absorption of the compensating material to the radiation absorption of human tissue.
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Cunningham et al, "A Semiautomatic Cutter for Compensating Filters", International Journal Oncology-Biology-Physics, 1976, vol. 1, pp. 355-360.
Kahn, Moore and Burns, "An Apparatus for the Construction of Irregular Surface Compensators for Use in Radiotherapy", Radiology, vol. 90, No. 3, pp. 593-594, Mar. 1968.
Brunelli Richard J.
Mestman Scott J.
Cole Stanley Z.
Lowe James
Varian Associates Inc.
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