Patent ID: 6553092
Filing Date: 2003-04-22
Classification: G01T

Abstract:
In a medical diagnostic imaging system which generates images from x-rays propagating from a radiation source to a radiation detector, the radiation detector comprising:a multi-layer scintillator including upper scintillating layers of relatively longer emission wavelength and lower x-ray absorption, at least one of the upper layers being doped zinc selenide, and lower scintillating layers of higher x-ray absorption and shorter emission wavelength which are substantially transparent to the light emitted by the upper layers, the upper and lower layers being aligned and arranged serially along a path of x-ray propagation and presenting a substantially equal cross section to x-rays propagating along the path; and a light sensitive array optically coupled to a lowest of the lower scintillating layers for viewing the multi-layer scintillator and combining the optical outputs of its multi-layers into an analog output which is adapted for reconstruction into a diagnostic image.