A prototype system to measure X-ray absorption spectra for diagnosis in vivo

详细信息    查看全文

• 作者：Bo Hu ; Xingliang Zhang ; Qinan Ouyang ; Xiaomei Wu ; Zheng Fang ; ^{fangzheng@xmu.edu.cn" class="auth_mail" title="E-mail the corresponding author}
• 关键词：X-ray absorption spectrum ; Diagnostic testing ; In vivo ; Radiation ; Prototype
• 刊名：Measurement
• 出版年：2016
• 出版时间：November 2016
• 年：2016
• 卷：93
• 期：Complete
• 页码：252-257
• 全文大小：949 K

文摘

We presented a new non-destructive test system for recording of X-ray absorption spectra. Its purpose was to investigate X-ray absorption spectral characteristics of organic and inorganic compounds and to explore the potential for biomedical pathological examination in vivo. An X-ray source with a maximum voltage of 80 kV and maximum current of 1 mA was selected for both good penetration and low radiation dose. A cadmium telluride (CdTe) detector was chosen for its wide energy range. Pulse-height analysis of the output of this sensor yielded energy spectra of X-rays that had passed through the sample. We calibrated the sensor with varying X-ray tube voltages and used tungsten X-ray lines to verify its accuracy. Different kinds of powders, aqueous solutions, aluminium alloys, and plastics were used as experimental samples to show their X-ray spectral absorption differences. The instrument had good prospects for further diagnostics combining radiology and tissue optics.