公开(公告)号：US4810893A

公开(公告)日：1989-03-07

申请号：US843134

申请日：1986-03-24

Applicant: Harm Meertens

Inventor： Harm Meertens

IPC: A61N5/10 ,  G01T1/29 ,  H01J47/02 ,  G01T1/185

CPC classification number: H01J47/028

Abstract: Image-detector for depicting differences in intensity in high energy photon beams with the aid of a photon-sensitive element, the photon-sensitive element is an ionization chamber, consisting in the main of two mainly equivalent plates of an electrically insulating material, which are attached to each other by a ring-shaped electrically insulating part as a divider, while the outer walls of both plates are covered with electrically conductive material, whereby one of the plates is equipped with a number of parallel high voltage electrodes over a central part of its inner wall and the other plate is equipped over a central part of its inner wall with a number of parallel ionization current electrodes which extend perpendicularly towards the high voltage electrodes, while the inner walls of both plates around the central parts are covered with an electrically conductive material and a liquid dieectric is situated in the space between the plates.

Abstract translation: 图像检测器借助于光子敏感元件来描绘高能量光子束的强度差异，该光子敏感元件是电离室，主要由电绝缘材料的两个主要相当的板组成，它们是 通过环形电绝缘部分作为分隔件彼此附接，同时两个板的外壁被导电材料覆盖，由此其中的一个板在中心部分上方配备有多个平行的高压电极 其内壁和另一个板被安装在其内壁的中心部分上，并具有垂直于高压电极延伸的多个平行的电离电流电极，而围绕中心部分的两个板的内壁被电 导电材料和液体薄膜位于板之间的空间中。