公开(公告)号：WO1987002821A1

公开(公告)日：1987-05-07

申请号：PCT/GB1986000655

申请日：1986-10-24

Applicant: PICKER INTERNATIONAL INC.

Inventor： PICKER INTERNATIONAL INC. ,  MATTSON, Rodney, A. ,  DeMEESTER, Gordon, D.

IPC: G21K01/02

CPC classification number: A61B6/032 ,  G21K1/025

Abstract: An off-focal radiation (40) collimator which includes a plurality of radiation absorbing elements (41) supported in spaced relationship with respect to one another in a housing (43) such that each element is aligned along radii extending from the focal spot (25) of a radiation source. The off-focal collimator is preferably disposed between the radiation source and a primary beam collimator (24). The off-focal collimator also acts as a radiation beam compensator. By varying the spatial density of the radiation absorbing elements (41) by a function of location within the housing, the radiation beam can be shaped to any desired profile.

公开(公告)号：EP0246264A1

公开(公告)日：1987-11-25

申请号：EP86906387.0

申请日：1986-10-24

Applicant: PICKER INTERNATIONAL, INC.

Inventor： MATTSON, Rodney, A. ,  DeMEESTER, Gordon, D.

IPC: G01N23 ,  A61B6 ,  G21K1

CPC classification number: A61B6/032 ,  G21K1/025

Abstract: Un collimateur de radiations hors-foyer (40) inclut une pluralité d'éléments d'absorption de radiations (41) supportés et espacés les uns par rapport aux autres dans un logement (43) de sorte que chaque élément est aligné le long de rayons s'étendant depuis le foyer (25) d'une source de radiations. Le collimateur ci-décrit est de préférence disposé entre la source de radiations et un collimateur de faisceau primaire (24). Le collimateur ci-décrit (40) fait également office de compensateur de faisceau de radiations. En faisant varier la densité spatiale des éléments d'absorption (41) de radiations en fonction de leur emplacement à l'intérieur du logement, il est possible de conformer le faisceau de radiations en n'importe quel profil désiré.

Abstract translation: 离焦辐射准直器（40）包括多个辐射吸收元件（41），所述多个辐射吸收元件（41）在壳体（43）中相对于彼此被支撑并间隔开，使得每个元件沿着半径 从辐射源的焦点（25）延伸。 上述准直器优选设置在辐射源与主束准直器（24）之间。 准直器（40）也用作辐射束补偿器。 通过根据辐射吸收元件（41）在壳体内的位置改变辐射吸收元件（41）的空间密度，可以将辐射束成形为任何期望的轮廓。

公开(公告)号：EP0246264B1

公开(公告)日：1990-09-19

申请号：EP86906387.5

申请日：1986-10-24

Applicant: PICKER INTERNATIONAL, INC.

Inventor： MATTSON, Rodney, A. ,  DeMEESTER, Gordon, D.

IPC: G21K1/02 ,  G21K1/10 ,  A61B6/03

CPC classification number: A61B6/032 ,  G21K1/025

Abstract: An off-focal radiation (40) collimator which includes a plurality of radiation absorbing elements (41) supported in spaced relationship with respect to one another in a housing (43) such that each element is aligned along radii extending from the focal spot (25) of a radiation source. The off-focal collimator is preferably disposed between the radiation source and a primary beam collimator (24). The off-focal collimator also acts as a radiation beam compensator. By varying the spatial density of the radiation absorbing elements (41) by a function of location within the housing, the radiation beam can be shaped to any desired profile.