Patent ID: 6806474
Filing Date: 2004-10-19
Classification: G01V

Abstract:
A method for detecting ionizing radiation emitted by a material located over an extended area without the need for moving a radiation detector having a detection axis substantially perpendicular to the area and located within a detector space, the method comprising:allowing ionizing radiation over a first narrow range of polar angles relative to the detection axis to enter the detector space and be detected by the detector while shielding ionizing radiation outside the first narrow range of polar angles from entering the detector space; and allowing ionizing radiation over at least one other narrow range of polar angles different from the first narrow range of polar angles to enter the detector space and be detected by the detector while shielding ionizing radiation outside the at least one other narrow range of polar angles from entering the detector space until the ionizing radiation emitted by the material over the extended area has been detected.