Abstract
Dedicated nuclear cardiology gamma-cameras, equipped with cadmium-zinc-telluride (CZT) semiconductor detectors and heart-centric collimation systems, are a significant technological advance in myocardial single emission computed tomography (SPECT) imaging. Performances of the two, commercially available, dedicated CZT-cameras have been extensively evaluated in both phantom and patient studies and compared to conventional scintillation Anger cameras. Numerous studies have reported improvements in image quality with an equivalent diagnostic performance. The properties of these CZT-cameras, particularly in terms of detection sensitivity and energy resolution, allow to further optimize current imaging protocols by reducing the injected activity and the acquisition time. The higher tomographic sensitivity provides additional opportunities for dynamic SPECT imaging, and the improved energy resolution has fostered additional interest in dual-isotope acquisition protocols.
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