Adaptive angular transmission filter for pet scanner

Details Adaptive angular transmission filter for pet scanner Adaptive angular transmission filter for pet scanner

1994-04-28

1995-06-13

Huntley, David M.

Boots, shoes, and leggings

36472419, 25036307, G06F 1542, G01T 1161

Patent

active

054249465

ABSTRACT:
A positron emission tomography scanner detects coincident annihilation events occurring in the field of view of a detector array and stores them as a two-dimensional sinogram array. Prior to image reconstruction, the sinogram transmission data is filtered along both dimensions (R, .theta.) to improve image quality. Row direction (R) filtering is manually selected, and column direction (.theta.) filtering is calculated automatically as a function of the amount of row direction filtering selected and the size of the object being imaged relative to the scanner's field of view.

REFERENCES:
patent: 4792900 (1988-12-01), Sones et al.
patent: 5241181 (1993-08-01), Mertens et al.
patent: 5272343 (1993-12-01), Stearns
patent: 5272344 (1993-12-01), Williams
patent: 5276614 (1994-01-01), Heuscher
patent: 5331553 (1994-07-01), Muehllehner et al.

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