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KMID : 1143620160200020049
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Korean Journal of Nuclear Medicine Technology
2016 Volume.20 No. 2 p.49 ~ p.53
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Compared Performance of Semiconductor SPECT in Myocardial Perfusion SPECT: Phantom study
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Bahn Young-Kag
Hwang Dong-Hun
Kim Jung-Yul
Kang Chun-Koo
Kim Jae-Sam
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Abstract
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Purpose : Recently, Cadmium-zinc-telluride (CZT) semiconductor myocardial SPECT (Single Photon Emission Computed Tomography) has been used myocardial scintigraphy. In this study, the performance of Semiconductor SPECT and conventional SPECT systems was compared by a comprehensive analysis of phantom SPECT images.
Materials and Methods : We evaluated the DSPECT CZT SEPCT (Spectrum-dynamic) and INFINA conventional (GE). Physical performance was compared on reconstructed SPECT images from a phantom.
Results : For count sensitivity on cardiac phantom images (counts · sec-1 · MBq-1), DSPECT had a sensitivity of conventional SPECT. This classification was similar to that of myocardial counts normalized to injected activities from phantom images (respective mean values, counts · sec-1 · MBq-1: 195.83 and 52.83). For central spatial resolution: DSPECT, 9.47mm; conventional SPECT, 16.90mm. For contrast-to-noise ratio on the phantom: DSPECT, 4.2; conventional SPECT, 3.6.
Conclusion : The performance of CZT cameras is dramatically higher than that of conventional SPECT. However, CZT
cameras differ in that spatial resolution and contrast-to-noise ratio are better with conventional SPECT, whereas count sensitivity is markedly higher with the DSPECT.
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KEYWORD
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CZT semiconductor myocardial SPECT, conventional SPECT, Myocardial Nuclearmedicine
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