Gas-filled detectors in medical and industrial imaging

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Abstract
Recently a number of gas-filled detectors based on multiwire proportional chambers have been successfully applied to imaging systems with x rays from generators or synchrotron radiation sources and (gamma) rays for medical scientific or industrial applications. The good position resolution, the high rate capability, the intrinsic digital recording in the single photon counting mode, and the large size make them interesting candidates for a number of applications that are discussed. Furthermore, these detectors allow the recording and processing of more complex information. This is demonstrated by an imaging single quantum counting detector with scatter rejection for gamma rays resulting in high contrast and position resolution and an x-ray detector using the pulse height measurement for dual energy tomography for composite material investigation. Future developments including micro strip gas detectors are discussed.

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