Patent ID: 7186986

Claim:
A megavoltage radiation detection system comprising: a radiation source directing megavoltage radiation along a propagation axis; a detector positioned to receive the radiation along the propagation axis, the detector including a plurality of substantially identical converter elements spaced transversely across the detector to define a plurality of detector volumes between opposed walls of the converter elements, wherein the opposed walls of the converter elements are angled with respect to the axis of propagation to increase the area over which radiation is intercepted by the converter elements, the converter elements receiving radiation and generating high-energetic electrons exiting the converter elements into the detector volumes; a voltage source biasing opposed converter elements; and a circuit providing a measure of current flowing between opposed converter elements to collect and detect charged high-energetic particles emitted into the detector volumes by the converter elements when the radiation interacts with the converter elements to provide for substantially independent signals, wherein the opposed walls are tipped according to lines of radius extending from a detector focal point and wherein the radiation source is positioned so that the megavoltage radiation emanates from a point displaced from the focal point, whereby the area of the detector in which radiation is intercepted by opposed walls is increased.