ISSN - 01689002, Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 2000, vol. 454, p. 130-135
Digital mammography with multi-electrode ionization chamber
For viewing micro-calcifications smaller than 100 μm investigation of image formation in mammography shows that a significant dose to the patient is imperative. We propose a novel one-dimensional Multi-electrode Ionization Chamber (MIC), with high spatial resolution, and lowered doses. In this work, first results from a prototype are presented. High spatial resolution is demonstrated working with Xe mixture at high pressure. An addition of a Gas Electron Multiplier (GEM) allowed an improvement in sensitivity up to almost single-photon level.