An evaluation of HgI2 detectors for x-ray computed tomography.
Mercuric iodide (HgI2) presents a set of attractive features as a semiconductor x-ray detector for computed tomography (CT). Its response is stable, it operates at room temperature, and thin detectors have a high detection efficiency. The properties of HgI2 permit the assembly of high spatial resolution detectors in a compact configuration. On the other hand, HgI2 exhibits a long memory, and some detectors also exhibit polarization effects, both of which are detrimental in CT. A pulse-shaping technique has been used to overcome these effects, thus demonstrating the suitability of HgI2 for use in CT.
D007454:Iodides; D008628:Mercury; D017669:Mercury Compounds; D011874:Radiometry / Q000295:instrumentation*; D012666:Semiconductors; D014057:Tomography, X-Ray Computed / Q000295:instrumentation*
D007454:Iodides; D017669:Mercury Compounds; D008628:Mercury; C025718:mercuric iodide, red