Method for locating an edge portion of an aperture in a filter m

Details Method for locating an edge portion of an aperture in a filter m Method for locating an edge portion of an aperture in a filter m

1992-06-29

1994-01-25

Boudreau, Leo H.

Image analysis

Histogram processing

For setting a threshold

36441313, 378159, 382 22, G06K 900

Patent

active

052822540

ABSTRACT:
The present invention is a method for locating an edge portion of an aperture in an X-ray filter member having at least one aperture formed therethrough, such that X-rays passing through the at least one aperture remain unattenuated and strike a subject body in a common region and wherein the X-rays passing through the filter member are attenuated and strike the subject body in a pattern that surrounds, and is adjacent to, the common region.

REFERENCES:
patent: 3717768 (1973-02-01), Edholm et al.
patent: 5086478 (1992-02-01), Kelly-Mahaffey et al.
patent: 5209232 (1993-05-01), Levene

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