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SPECT/CT images. SSS: summed stress score, SRS: summed rest score, SDS: summed difference score. Stress, rest and perfusion reversibility polar maps showing reversible perfusion defect with semiquantitative summed difference score 7, representing low to intermediate risk for a cardiac event. PACS system Sectra Workstation IDS7 Version 21.2, IHE, Chicago, IL, USA.
