Ga - Pentixafor Uptake in Acute Myocardial Infarction Affecting the Left Anterior Descending

for the global estimate, and increased for the segmental estimates for all SSFP estimates (5% vs. 9%, respectively). The variability between masked and original SSFP estimates was largest for ExMyo and Contour estimates. Through-plane motion is likely to introduce errors in strain. Because tags are created orthogonal to the image plane, the tagging strain estimate is more robust to through-plane motion. A 3-dimensional analysis may give better agreement between untagged and tagged estimates. Limitations include differences in slice thickness (6 mm for SSFP and 8 mm for tagging), which may give rise to small differences in strain. Masking the myocardium also introduces different endocardial and epicardial image edge features, which may influence the feature tracking results. However, Figure 1B shows that the Myo mask did not significantly change segmental estimates. Our results support the conclusions that global strain is primarily determined by changes in the circumference, and that features outside the myocardium greatly influence segmental strain estimates. Because the anterior insertion point of the RV free wall into the interventricular septum curves around the left ventricle, through-plane motion gives rise to apparent deformation. Also, relative motions of papillaries and trabeculae give rise to strain artifacts. The pericardium also creates a potential discontinuity between myocardial and extracardiac motion.