A study on electron density imaging using the Compton scattered X-ray CT technique

作者：Masuji Ryota; Watanabe Kenichi^*; Yamazaki Atsushi; Uritani Akira

来源：Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment , 2011, 652(1): 620-624.

DOI：10.1016/j.nima.2010.09.106

• Computed tomography
• Electron density
• Proton and charged particle radiotherapy
• Compton scattering

We propose a novel electron density imaging technique based on a Compton scattered X-ray CT (CSX-CT) technique. We design fundamental configuration of the CSX-CT system, which consists of a fan-shaped X-ray beam, two-dimensional sensors for scattered X-ray detection, parallel plate collimators for limitation of the direction of scattered X-rays and a line sensor for the transmission of X-ray CT (TX-CT). An image obtained by the TX-CT can be used to correct the attenuation effect of scattered X-rays. Through Monte Carlo simulation modeling studies of the CSX-CT system, we demonstrate that the utilization of the information of scattered X-rays is useful to obtain the electron density image. We additionally confirm that the medical exposure irradiated in the CSX-CT is estimated to be lower than the maximum dose recommended in the guideline of some committees.

• 出版日期2011-10-1