Solid state detector for CT comprising improvements in collimato

Details Solid state detector for CT comprising improvements in collimato Solid state detector for CT comprising improvements in collimato

1981-12-28

1984-01-31

Smith, Alfred E.

Radiant energy

Invisible radiant energy responsive electric signalling

With or including a luminophor

378 19, 378154, A61B 600, G01T 120

Patent

active

044292279

ABSTRACT:
A modular solid state x-radiation detector. A detector array is made up of a plurality of collimator plates having pockets formed in the planar surfaces thereof to carry scintillator bars, and dimensioned so that the edges of the scintillators are shielded by the pockets, yielding several advantages. Wider scintillator bars are thus possible, increasing quantum detection efficiency while guarding against energy dependent punch through at the edges of the scintillator, thereby to enhance spectral linearity. The arrangement also prevents x-rays from bypassing the scintillator, thus protecting the adhesive which bonds the scintillator to the plate and the photodiodes mounted behind the scintillator. A further benefit is an increase in optical transfer of light to the rear of the scintillator where the diode is mounted since there is a less severe aspect ratio of depth to width, reducing the number of reflections encountered by light travelling to the photodiode. The collimator plates are also provided with opposed legs which engage slots in a photosensor assembly to accurately align the photosensor and scintillator.

REFERENCES:
patent: 4031396 (1977-06-01), Whetten et al.
patent: 4119853 (1978-10-01), Shelley et al.
patent: 4161655 (1979-07-01), Cotic et al.
patent: 4180737 (1979-12-01), Kingsley
patent: 4181856 (1980-01-01), Bone
patent: 4187427 (1980-02-01), Cusano
patent: 4220860 (1980-09-01), Carlson et al.
patent: 4292525 (1981-09-01), Tschunt

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