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Reproducibility of an Automatic Quantitation of Regional Myocardial Wall Motion and Systolic Thickening on Gated ^99mTc-Sestamibi Myocardial SPECT

Department of Nuclear Medicine and Internal Medicine, Seoul National University College of Medicine, Seoul, Korea

View larger version (14K): [in a new window]   FIGURE 1. Procedure for dipyridamole stress 99mTc-sestamibi (MIBI) gated SPECT. Scanning was performed twice consecutively in short time without change of position.

View larger version (29K): [in a new window]   FIGURE 2. Myocardium was partitioned into 20 segments. Apex was divided into 2 segments, and apical, mid, and basal regions were divided into 6 segments each. For assessment of influence of wall location, segments were classified into 5 wall locations. Each pattern represents different wall location.

View larger version (23K): [in a new window]   FIGURE 3. Correlation of automatic quantitation of motion on repeated gated SPECT (A) and Bland–Altman plotting of motion (B).

View larger version (24K): [in a new window]   FIGURE 4. Correlation of automatic quantitation of systolic thickening on repeated gated SPECT (A) and Bland–Altman plotting of systolic thickening (B).

View larger version (16K): [in a new window]   FIGURE 5. Means and confidence intervals (CI) of absolute differences between repeated measurements for wall motion (A) and for systolic thickening (B) according to wall locations. Ant = anterior wall; Inf = inferior wall; Lat = lateral wall; Sept = septal wall.

View larger version (16K): [in a new window]   FIGURE 6. Means and confidence intervals (CI) of absolute differences between repeated measurements for wall motion (A) and for systolic thickening (B) according to perfusion grade. Higher grade represents more severe perfusion decrease.