The optimal collimator and energy window for Yttrium-90 bremsstrahlung SPECT imaging was investigated in the study. Yttrium-90 images were acquired with a dual-head gamma camera, equipped with parallel hole collimators and ⁹⁰Y vial for different energy windows ranging from 56 to 232 keV. Image quality parameters (sensitivity, %FOV, and S/B) were examined for the energy window and collimator combinations. It is concluded that the optimal SPECT imaging was achieved using FBP Method with a HEGP collimator and the energy window of 90–110 keV.

中文翻译：

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YTTRIUM-90 stra致辐射SPECT成像的准直器和能量窗优化

研究了钇90 ms致辐射SPECT成像的最佳准直仪和能量窗口。Yttrium-90图像是用双头伽马相机采集的，该相机配有平行孔准直仪和⁹⁰ Y样品瓶，用于从56到232 keV的不同能量窗口。检查了能量窗口和准直仪组合的图像质量参数（灵敏度，％FOV和S / B）。结论是，使用带有HEGP准直仪的FBP方法和90-110 keV的能量窗口可以实现最佳SPECT成像。