X-ray Detection by Webcam

Abstract

We tried to detect X-rays by a webcam as a low price detector. We wrote computer programs to measure with the webcam and to integrate data from it. White dots were appeared on frames while a CMOS sensor on the webcam was exposed to X-rays. By making shadow on the sensor with a steel wire, we estimated source-sensor distance and source size. We also estimated spatial resolution of the webcam at 5×5 pixels per photon by counting events by number of affected pixels by photons.