Digital Scale for Tomography and Method of Using Same.
OFFICE OF THE SECRETARY OF THE ARMY WASHINGTON D C
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The patent describes a test for measuring the depth of focus of an X-ray exposure. The test object is comprised of a planar surface of X-ray transparent material on which are positioned a coded array of X-ray opaque elements. In use, the test object is angularly inclined to the X-ray field so that the number of coded elements in focus in the resulting X-ray exposure provides ameasurement of the depth of focus of the X-ray device.
- Test Facilities, Equipment and Methods