High resolution, multiple-energy linear sweep detector for x-ray

Details High resolution, multiple-energy linear sweep detector for x-ray High resolution, multiple-energy linear sweep detector for x-ray

1994-12-06

1996-08-20

Willis, Davis L.

Radiant energy

Invisible radiant energy responsive electric signalling

Semiconductor system

25037009, G01T 116

Patent

active

055481230

ABSTRACT:
Apparatus for generating plural electrical signals in a single scan in response to incident X-rays received from an object. Each electrical signal represents an image of the object at a different range of energies of the incident X-rays. The apparatus comprises a first X-ray detector, a second X-ray detector stacked upstream of the first X-ray detector, and an X-ray absorber stacked upstream of the first X-ray detector. The X-ray absorber provides an energy-dependent absorption of the incident X-rays before they are incident at the first X-ray detector, but provides no absorption of the incident X-rays before they are incident at the second X-ray detector. The first X-ray detector includes a linear array of first pixels, each of which produces an electrical output in response to the incident X-rays in a first range of energies. The first X-ray detector also includes a circuit that generates a first electrical signal in response to the electrical output of each of the first pixels. The second X-ray detector includes a linear array of second pixels, each of which produces an electrical output in response to the incident X-rays in a second range of energies, broader than the first range of energies. The second X-ray detector also includes a circuit that generates a second electrical signal in response to the electrical output of each of the second pixels.

REFERENCES:
patent: 4511799 (1985-04-01), Bjorkholm
patent: 4626688 (1986-12-01), Barnes
patent: 5103100 (1992-04-01), Iketaki
patent: 5138167 (1992-08-01), Barnes

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