Technical consideration for dual ECG/respiratory-gated cardiac PET imaging
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The importance of spatial resolution in myocardial perfusion imaging (MPI) has been continuously emphasized over the years with improvements in both hardware and software advancement for acquisition and processing. These advances and innovations began from changes in acquisition parameters (e.g., collimator design, acquisition & orbit type, and attenuation correction) to utilizing emerging technologies with solid-state detectors in hardware, and from a simple filtered back projection reconstruction to iterative, resolution recovery and scatter correction reconstruction algorithm techniques in software. While these advances mostly apply to SPECT imaging, PET MPI has undergone a steady evolution improving various aspects of imaging as well, including improvements in spatial resolution. Unlike any other organ imaged in nuclear medicine, improving the image resolution in SPECT or PET cardiac imaging still remains challenging due to inherent cardiac contraction,...
© American Society of Nuclear Cardiology 2016