Dose reductions in dental X-ray imaging using Medipix
- 作者：Watt ; J. ; Davidson ; D.W. ; Johnston ; C. ; Smith ; C. ; Tlustos ; L. ; Mikulec ; B. ; Smith ; K.M. ; Rahman ; M.
- 关键词：Photon counting ; Noise power spectrum ; CCD ; Hybrid pixel detectors
- 刊名：Nuclear Instruments and Methods in Physics Research Section A ; Accelerators ; Spectrometers ; Detectors and Associated Equipment
- 出版年：2003
- 期刊代码：41_01689002
- 类别：ph
- 出版时间：November 1, 2003
- 卷：513
- 期：1-2
- 页码：65-69
- 文件大小：216 K
摘要
We have measured the noise power spectra for a commercial CCD device, for dental X-ray imaging, and an X-ray photon counting chip, Medipix1. This quantity provides a measure of the noise propagation characteristics in both types of detector and coupled with the measurement of the modulation transfer function demonstrates the large dose reductions that are possible with the photon counting system compared to the CCD.