Abstract
Current commercially available whole-body CZT cameras have different geometric configurations such as “2D” geometry (2 flat detectors) or “3D” geometry (12 detectors on a 360° ring shaped gantry). These cameras utilize more effective detectors compared to NaI(Tl) scintillators, especially in terms of energy resolution and contrast-to-noise ratio. The contribution of “3D” geometry enables increased detection sensitivity since the distance between the object and detector decreased, thus providing improved tomographic spatial resolution. In addition, corrections provided by dedicated reconstruction algorithms contribute to improved image quality. All these factors allow protocols optimization through the reduction of injected activity and/or recording time, performance of dual isotope studies and the utilization of SPECT within a theranostic strategy.
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