Combined Modalities of Compton Scattering Tomography
Combined Modalities of Compton Scattering Tomography
复制标题
康普顿散射断层扫描的组合模式
DOI：
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发表时间：
2013
影响因子：
1.8
通讯作者：
Habib Zaidi
中科院分区：
文献类型：
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作者：
G. Rigaud;R. Régnier;Mai K. Nguyen;Habib Zaidi
对人体隐藏部位进行观察和分析的要求以及当前成像技术的局限性正在推动新方法的发展。在临床PET/CT系统中，研究的身体区域的衰减和活动图是从测量中恢复的。然而，康普顿散射模型可以直接从传输数据中通过电子密度获得衰减图，从而避免了CT扫描的需要。在此背景下，提出了一种使用散射辐射的双峰成像方法(伽马射线传输/发射成像)，称为康普顿散射层析成像(CST)。这一概念由两个广义Radon变换来模拟，并建议重建所研究物体区域的电子密度、衰减图和活度浓度。仿真结果验证了这种新的成像概念的可行性和可行性。本方法可能是当前断层成像技术的一种有趣的替代方法。
The requirement to scope and analyze hidden parts of the human body and the limitations of current imaging technologies is motivating the development of novel approaches. In clinical PET/CT systems, the attenuation and activity maps of the studied body region are recovered from measurements. However, the modeling of Compton scattering enables to obtain the attenuation map through the electron density directly from transmission data, thus obviating the need of a CT scan. In this context, a bimodality imaging approach (gamma-ray transmission/emission imaging) using scattered radiation referred to as Compton scattering tomography (CST) is presented. This concept is modeled by two generalized Radon transforms and proposes to reconstruct the electron density, the attenuation map, and the activity concentration of the studied body region. Simulation results demonstrate the feasibility and viability of this novel imaging concept. The present approach could be an interesting alternative to current tomographic imaging techniques.