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Figure 3 Direct comparison of adenosine and regadenoson images using a dual-isotope protocol (rest: thallium-201, stress: Tc-99m tetrofosmin). These images reveal a large, mild, reversible perfusion defect in the anterior, apical, and lateral walls. Similar findings were noted on the adenosine and regadenoson stress images. Upper panel is the regadenoson study.
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