ABSTRACT A novel SPECT model with an elliptical orbit and multiple detectors is proposed for detecting the metabolism of the human heart. Under the structure of the proposed model, the distance between the detector and the patient becomes smaller, which can effectively improve the SNR. The slit-slat collimator is used to collimate the emitted photons. Modified iterative reconstruction algorithm is proposed to reconstruct a small centre field with severe truncation data under the constraints of body contour and total variation (TV). Simulations for the proposed SPECT are implemented to access the image reconstruction quality. The simulation results show that proposed imaging system with appropriate reconstruction methods can provide significant improvements in the spatial resolution and the image quality. The geometric efficiency of the proposed SPECT is about twice that of the conventional SPECT system, but the scanning time is only about one tenth.

中文翻译：

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一种新型心脏SPECT系统及成像方法

摘要 提出了一种具有椭圆轨道和多个探测器的新型 SPECT 模型，用于检测人体心脏的新陈代谢。在所提出模型的结构下，探测器与患者之间的距离变小，可以有效提高信噪比。狭缝板条准直器用于准直发射的光子。提出了改进的迭代重建算法，在身体轮廓和总变异（TV）的约束下重建具有严重截断数据的小中心场。对建议的 SPECT 进行模拟以访问图像重建质量。仿真结果表明，所提出的成像系统采用适当的重建方法可以显着提高空间分辨率和图像质量。