Invention Grant
US4157475A Electron accelerator comprising a target exposed to the electron beam
失效
包括暴露于电子束的靶的电子加速器
- Patent Title: Electron accelerator comprising a target exposed to the electron beam
- Patent Title (中): 包括暴露于电子束的靶的电子加速器
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Application No.: US863514Application Date: 1977-12-22
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Publication No.: US4157475APublication Date: 1979-06-05
- Inventor: Eberhard Stock , Leonhard Taumann
- Applicant: Eberhard Stock , Leonhard Taumann
- Applicant Address: CA Walnut Creek
- Assignee: Applied Radiation Corporation
- Current Assignee: Applied Radiation Corporation
- Current Assignee Address: CA Walnut Creek
- Priority: CAX289258 19771021
- Main IPC: A61N5/10
- IPC: A61N5/10 ; G21K1/02 ; G21K1/10 ; H01J35/00
Abstract:
In order to supply a dose rate which is as constant as possible over the cross section of the x-ray cone for radiation therapy, especially at lesser tissue depths (e.g. 3 cm), the surfaces of the collimator which define the margin of the x-ray cone are roughened for example by means of grooves transverse to the radiation direction, the grooves having semicircular or step-shaped cross sectional configuration, and advantageously being formed in a thin walled sleeve of low atomic number.
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