H - Electricity – 05 – G
Patent
H - Electricity
05
G
358/11.1
H05G 1/26 (2006.01) A61B 6/03 (2006.01) A61B 6/06 (2006.01) G01N 23/08 (2006.01) G01T 1/00 (2006.01) G21K 1/02 (2006.01)
Patent
CA 1151778
PHN 9565 16-7-1980 ABSTRACT: "Device for determining local absorption differences in an object". The invention relates to a device for determining local absorption differences in a planar object section, comprising an X-ray source and an X-ray detector which is directed towards the X-ray source and which comprises a number of plate-shaped collimating elements which are directed towards the X-ray source. On the respective lines of projection of these collimating elements towards the source, there are arranged radiation absorbing elements whose dimensions, measured in the direction of the X-ray source, are smaller than those of the collimating elements and whose dimensions measured in a direction at right angles and in the sectional plane are larger than -those of the collimating elements. Apparent variations in. the sensitivity of the X-ray detector due to a lateral shift of the X-ray focus in the X-ray source, are thus sub- stantially mitigated.
359460
Fetherstonhaugh & Co.
N.v. Philips Gloeilampenfabrieken
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