Claims
- 1. Apparatus for holding shields in fixed position adjacent a patient positioned on a treatment table for treatment by a radiation therapy beam, said holding apparatus comprising:
- two substantially semicircular hoops, each of said hoops having at each of its ends support means for positioning the hoops on guide rails such that the hoops face each other and are adjustable toward and away from each other;
- a plurality of mounting blocks adjustably positionable along each of said hoops;
- a shaft supported by each said mounting block for adjustable positioning toward and away from the central portion of the hoop with which the respective mounting block is associated; and
- each said shaft having a rest surface facing outwardly toward its respective block, whereby selective movement of said blocks along said hoops and selective movement of said shafts relative to said blocks enables positioning of said rest surfaces in a variety of different arrangements so as to permit supporting on said rest surfaces variously shaped shields.
- 2. Apparatus as claimed in claim 1 in combination with arc therapy equipment including a shielding mask positioned outwardly of said hoops.
- 3. Apparatus as claimed in claim 1 further comprising clamp means located on said shafts outwardly of said rest surfaces for clamping shields on said rest surfaces.
Parent Case Info
This application is a continuation of application Ser. No. 659,876, filed 10/15/84, abandoned which is a continuation of Ser. No. 432,606 filed 10/4/82 abandoned.
US Referenced Citations (8)
Foreign Referenced Citations (11)
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0033050 |
Aug 1981 |
EPX |
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EPX |
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Non-Patent Literature Citations (1)
Entry |
Pro. of Symposium on Electron Dosimetry and Arc Therapy, Sep. 10-11, 1981, "Tertiary Collimation of Moving Electron Beams"--Bruce Thomadsen. |
Continuations (2)
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Number |
Date |
Country |
Parent |
659876 |
Oct 1984 |
|
Parent |
432606 |
Oct 1982 |
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