Evaluation of Cadmium-Zinc-Telluride Detector-based Single-Photon Emission Computed Tomography for Nuclear Cardiology: a Comparison with Conventional Anger Single-Photon Emission Computed Tomography
Evaluation of Cadmium-Zinc-Telluride Detector-based Single-Photon Emission Computed Tomography for Nuclear Cardiology: a Comparison with Conventional Anger Single-Photon Emission Computed Tomography
复制标题
DOI：
10.1007/s13139-017-0474-9
复制
发表时间：
2017-12-01
影响因子：
1.3
通讯作者：
Maeda, Hisatoshi
中科院分区：
文献类型：
--
作者：
Niimi, Takanaga;Nanasato, Mamoru;Maeda, Hisatoshi
目的从使用者的角度来看，碲化镉锌(CZT)相机或准直系统与传统的单光子发射计算机断层扫描(A-SPECT)在性能上的差异仍然不够。材料与方法本研究从能量分辨率、探测器灵敏度、空间分辨率、调制传递函数(MTF)和准直器分辨率等方面对D-SPECT系统与A-SPECT(Bright-View，飞利浦，日本)进行了比较。测量了99m、I-123和Tl-201的能量分辨率和探测器灵敏度。结果99m和I-123的D-SPECT的能量分辨率约为A-SPECT的2倍。D-SPECT的灵敏度高于A-SPECT(Tc99m：4.2倍，I-123：2.2倍，Tl-201：5.9倍)。D-SPECT的平均空间分辨率是A-SPECT的2倍。D-SPECT的MTF在所有频率上均优于A-SPECT系统。D-SPECT的准直器分辨率低于A-SPECT，但D-SPECT图像的空间分辨率明显高于A-SPECT图像。结论D-SPECT的能量分辨率、探测器灵敏度、空间分辨率和MTF均优于A-SPECT。虽然准直仪分辨率低于A-SPECT，但D-SPECT图像质量明显好于A-SPECT。
Purpose The differences in performance between the cadmium-zinc-telluride (CZT) camera or collimation systems and conventional Anger single-photon emission computed tomography (A-SPECT) remain insufficient from the viewpoint of the user. We evaluated the performance of the D-SPECT (Spectrum Dynamics, Israel) system to provide more information to the cardiologist or radiological technologist about its use in the clinical field.Material and Methods This study evaluated the performance of the D-SPECT system in terms of energy resolution, detector sensitivity, spatial resolution, modulation transfer function (MTF), and collimator resolution in comparison with that of A-SPECT (Bright-View, Philips, Japan). Energy resolution and detector sensitivity were measured for Tc-99m, I-123, and Tl-201. The SPECT images produced by both systems were evaluated visually using the anthropomorphic torso phantom.Results The energy resolution of D-SPECT with Tc-99m and I-123 was approximately two times higher than that of A-SPECT. The detector sensitivity of D-SPECT was higher than that of A-SPECT (Tc-99m: 4.2 times, I-123: 2.2 times, and Tl-201: 5.9 times). The mean spatial resolution of D-SPECT was two times higher than that of A-SPECT. The MTF of D-SPECT was superior to that of the A-SPECT system for all frequencies. The collimator resolution of D-SPECT was lower than that of A-SPECT; however, the D-SPECT images clearly indicated better spatial resolution than the A-SPECT images.Conclusions The energy resolution, detector sensitivity, spatial resolution, and MTF of D-SPECT were superior to those of A-SPECT. Although the collimator resolution was lower than that of A-SPECT, the D-SPECT images were clearly of better quality.