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FIGURE 3. (A) Coregistration: displays from fusion tool supplied by General Electric Medical Systems. Left, CT slices; center, SPECT slices; right, fused images. Top row, misalignment in craniocaudal direction (y-direction). Bottom row, corrected study. (B) Vertical long-axis slices of reconstructed SPECT study without AC (IRNC), after AC (IRAC), and after correction for misalignment (IRAC-MC). Arrows mark defects in apical anterior wall, which are not visible in non–attenuation-corrected slices and are improved in slices corrected for misalignment.
