Filter for gamma ray camera

Details Filter for gamma ray camera Filter for gamma ray camera

1988-05-05

1989-07-25

Church, Craig E.

X-ray or gamma ray systems or devices

Beam control

Filter

378145, 25036302, 25036310, 2505051, 420525, G21K 300

Patent

active

048521426

ABSTRACT:
An alloy filter in the form of a plate made from a homogeneous alloy comprising 85-95 wt. % cadmium, 5-15 wt. % copper and up to 3 wt. % of incidental impurities is interposed between a collimator and sodium iodide crystal of a gamma camera. The alloy filter improves image resolution by allowing the passage only of emmissions which impinge substantially perpendicularly on the collimator, while filtering out others which impinge obliquely.

REFERENCES:
patent: 1904175 (1933-04-01), Swartz et al.
patent: 2744197 (1956-05-01), Gogolick et al.
patent: 4118632 (1978-10-01), Luig
patent: 4160165 (1979-07-01), McCombs et al.
patent: 4283625 (1981-08-01), King
patent: 4618773 (1986-10-01), Drukier
patent: 4764946 (1988-08-01), Teleki
Pillay, Shapiro, and Cox, European Journal of Nuclear Medicine (1986), vol. 12, pp. 293-295.

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