Nuclear Cardiology: Nuclear Cardiology:

120 Nuclear Cardiology, The BasicsFig. 10-34. WLCQ. Quantification of myocardial perfusion using circumferentialcount distribution profiles. The yellow curves represent regional count distributionon the stress images. The red curves represent rest images. The whitecurve depicts the lower limit of normal radiotracer distribution. The stress curveis below the lower limit of normal in the apical slices in the anterior and lateralregions. The rest curve in the apical slices is within normal range. In the midventricular short-axis slices, the stress curve is below to the lower limit ofnormal in the anterior, inferior, and lateral regions. The mid ventricular restcurve is within normal range. In the basal slices the stress curve is below normalin the inferior and lateral region. The rest curve in the basal slices is largelywithin normal range. At the apex a reversible defect is present. Stress and restdefect size are quantified in the table at the top. The stress defect is large andinvolves 18% of the left ventricle, the rest defect is very small at 2%. This is anexample of a large reversible anteroapical, anteroseptal, lateral and inferiordefect.