Radiant energy – Photocells; circuits and apparatus – Photocell controlled circuit
Patent
1998-07-21
2000-06-20
Le, Que T.
Radiant energy
Photocells; circuits and apparatus
Photocell controlled circuit
2503851, 250374, H01L 3100
Patent
active
060780398
ABSTRACT:
A structure for detecting radiation, useful in an imaging camera for nuclear medicine, comprising a plurality of tubes, each of said tubes having (1) an electrically conductive wall structure defining a tube internal radius and a proximal and a distal end, (2) a pressure retaining and electrically insulative tube end closure means at each tube end, (3) a coaxial electrically conductive element located between said insulative tube end closure means; said tubes containing xenon at a pressure sufficient to provide for a photoelectron range there within of or less than that distance existing between the proximal and distal ends thereof and a maximum ionization collection distance of or less than the tube internal radius; said tubes positioned in a honeycomb-like array such that each proximal and distal tube end is in a common plane one with another, respectively.
REFERENCES:
patent: 4870282 (1989-09-01), Lacy
patent: 4999501 (1991-03-01), Lacy
patent: 5500534 (1996-03-01), Robinson et al.
Le Que T.
Luu Thanh X.
Proportional Technologies, Inc.
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