Method and apparatus for imaging radiation beams of different wavelengths

摘要

A radiation imaging method and system for use in various imaging techniques includes a source (12) of spatially-separate radiation beams (13,14) at first and second wavelengths (L1,L2) respectively. The radiation beams pass through an object (18) to be imaged and are detected by a target array of sensors arranged in addressable lines (21). Each beam separately scans across each line of sensors to produce first and second outputs which are combined to produce a combined image signal that has increased contrast from that which would be produced by either the first or the second output alone. Preferably, the array is an amorphous silicon array and mean is provided for synchronously clocking sensor data from the array.