INTEGRATED SIDE-BY-SIDE PIXEL-ARRAY SENSOR FOR X-RAY BOTH DUAL-ENERGY AND EXTENDED DYNAMIC RANGE SINGLE-ENERGY

摘要

A radiation image detector comprises two parallel rows of one dimensional pixel arrays in a single substrate so that the two pixel arrays are precisely aligned and spaced. Each pixel in one pixel array has a corresponding pixel in the other pixel array. Two arrays are responsive to radiation with different sensitivity by applying different scintillating material. When an object moves perpendicular to the both pixel arrays under radiation flux, two sets of correlated radiation images will be generated. By applying software image merging technique, dynamic range can be extended. If a filter material is placed in front of pixel array with more sensitivity then it then becomes a standard dual-energy detector. The pixel array with filter is high-energy (HE) detector and the other array is low-energy (LE) detector.