Elastic scatter computed tomography

A technique is proposed for imaging 2D sections based on measurement of elastic scatter radiation. In this new imaging method the radiation from a conventional X-ray source (Philips MCN 165 160 kVp tube operated at 140 kVp and 4.6 mA with 0.6 mm focus) is collimated by a lead diaphragm (1.0 mm) and falls on the object to be investigated. The transmitted radiation and the scatter falling within a range of half-angle 6 degrees (with reference to the object centre) are recorded by seven scintillation detectors (BGO) operated in current integration mode. Each scintillation crystal subtends an angular range of 1 degrees . The detector array comprises three scatter detectors arranged symmetrically on either side of the central transmission detector in such a way that six (partially overlapping) scatter measurements result.