公开(公告)号：US4157475A

公开(公告)日：1979-06-05

申请号：US863514

申请日：1977-12-22

Applicant: Eberhard Stock ,  Leonhard Taumann

Inventor： Eberhard Stock ,  Leonhard Taumann

IPC: A61N5/10 ,  G21K1/02 ,  G21K1/10 ,  H01J35/00

CPC classification number: 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.

Abstract translation: 为了在辐射治疗的x射线锥体的横截面上提供尽可能恒定的剂量率，特别是在较小的组织深度（例如3cm）处，准直器的限定x的边缘的表面 射线锥体例如通过横向于辐射方向的凹槽被粗糙化，凹槽具有半圆形或阶梯形横截面形状，并且有利地形成在低原子序数的薄壁套筒中。