Tomography X-ray detector
First Claim
1. An X-ray detector for use in integrating mode in high speed tomography apparatus comprising:
- A. a scintillator that emits light in response to incident X-rays, said scintillator having a surface of a selected total area,B. a coating that reflects said light emitted by the scintillator covering the entire surface area of said scintillator except for a window in one surface,c. a photo-diode whose output current is substantially linearly related to the light incident on the diode, said diode having one surface positioned directly opposite said window, the ratio of the active area of the diode to the area of the scintillator covered by said coating being appreciably less than unity, andD. means for bonding said diode to said one scinitiallator surface in said window, said bonding means being transparent to the light emitted by the scintillator in response to the incident X-rays.
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Accused Products
Abstract
A small but very efficient X-ray detector operating in a current integrating mode for use in high speed tomography apparatus comprises a scintillator that is entirely coated with a highly reflective matte material except for a relatively small-area window. A P.I.N photo-diode is juxtaposed with the scintillator opposite the window and the two are secured together at an optical interface comprising a transparent adherent material preferably having an index of refraction between the indices of the scintillator and the photo-diode. The ratio of the active surface area of the photo-diode to the area of the scintillator coated with reflective material is appreciably less than unity.
23 Citations
11 Claims
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1. An X-ray detector for use in integrating mode in high speed tomography apparatus comprising:
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A. a scintillator that emits light in response to incident X-rays, said scintillator having a surface of a selected total area, B. a coating that reflects said light emitted by the scintillator covering the entire surface area of said scintillator except for a window in one surface, c. a photo-diode whose output current is substantially linearly related to the light incident on the diode, said diode having one surface positioned directly opposite said window, the ratio of the active area of the diode to the area of the scintillator covered by said coating being appreciably less than unity, and D. means for bonding said diode to said one scinitiallator surface in said window, said bonding means being transparent to the light emitted by the scintillator in response to the incident X-rays. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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Specification