断层摄影术
能量(信号处理)
分辨率(逻辑)
光学
物理
X射线
光子
光子能量
光谱(功能分析)
计算物理学
计算机科学
人工智能
量子力学
作者
Rodrigo Álvarez,Albert Macovski
标识
DOI:10.1088/0031-9155/21/5/002
摘要
All X-ray computerised tomography systems that are available or proposed base their reconstructions on measurements that integrate over energy. X-ray tubes produce a broad spectrum of photon energies and a great deal of information can be derived by measuring changes in the transmitted spectrum. It is shown that for any material, complete energy spectral information may be summarised by a few constants which are independent of energy. A technique is presented which uses simple, low-resolution, energy spectrum measurements and conventional computerised tomography techniques to calculate these constants at every point within a cross-section of an object.
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