公开(公告)号：US4048507A

公开(公告)日：1977-09-13

申请号：US657164

申请日：1976-02-11

Applicant: Alexis Neal de Gaston

Inventor： Alexis Neal de Gaston

IPC: A61B6/08 ,  H01J35/00 ,  G03B41/16

CPC classification number: A61B6/08 ,  H01J35/00

Abstract: A pair of separated semi-radio opaque sheets having a similar target pattern removed therefrom are placed in parallel alignment with the targets in perpendicular alignment. When exposed to an X-ray beam of a diagnostic X-ray machine, the targets produce a pattern in the radiograph in which the two targets are superimposed in slight misalignment except where the X-ray beam is perpendicular, thereby locating the perpendicular X-ray beam position with respect to the collimator jaws and visual target of the machine.

Abstract translation: 将具有从其去除的相似目标图案的一对分离的半不透光片放置成与靶垂直对准的平行对准。 当暴露于诊断X射线机的X射线束时，目标物在X射线照片中产生一个图案，其中两个靶以轻微的未对准重叠，除了X射线束垂直之外， 相对于准直器夹爪和机器的视觉目标的射线束位置。