G - Physics – 01 – N
Patent
G - Physics
01
N
358/11
G01N 23/04 (2006.01) A61B 6/00 (2006.01) G01N 23/02 (2006.01) G03B 42/02 (2006.01) H05G 1/36 (2006.01) H05G 1/64 (2006.01)
Patent
CA 1193762
ABSTRACT: In an X-ray examination apparatus comprising an image intensifier tube and an optical light distribution system there is included an image field selector, by means of which, using a subbeam diverted from the imag- ing beam, a measurement field can be selected and by means of which this measurement field or a boundary out- line thereof can be projected back into the imaging radiation path. Thus, it is achieved that during an examination stage an indication of the extent and loca- tion of a measurement field which is considered to be relevant for controlling the desired exposure for pic- tures to be produced, can be constantly displayed on the image screen of the television monitor.
422310
N.v. Philips Gloeilampenfabrieken
Van Steinburg C.e.
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