Patent ID: 7567646
Filing Date: 2009-07-28
Classification: A61B,G01T,H01L

Abstract:
1. A radiation detector having a radiation receiving face, the radiation detector comprising: a first scintillator which absorbs radiation and produces light at a first wavelength; a second scintillator which absorbs radiation and produces light at a second wavelength, wherein the second wavelength is shorter than the first wavelength; a first photodiode having a first long wavelength cutoff; a second photodiode having a second long wavelength cutoff, wherein the first photodiode is disposed between the second photodiode and the radiation receiving face and receives light produced by the second scintillator, wherein the second photodiode receives light produced by the first scintillator, and wherein the first long wavelength cutoff is shorter than the second long wavelength cutoff and longer than the second wavelength; a first electrical contact; and a second electrical contact, wherein the first and second electrical contacts are in electrical communication with the first photodiode through vias disposed in the second photodiode.