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Figure 2 LV Volume Calculated From Cardiac Magnetic Resonance (CMR) Images Depends on Inclusion Criteria for Basal Slices
This is demonstrated here using a long-axis CT image (left) depicting left ventricular (LV) anatomy with great detail. Cardiac magnetic resonance images are generated by compacting information from slices of finite thickness (8 mm in this study). A slice that contains the mitral valve (middle panel, between horizontal orange lines) would correspond to a short-axis view where most of the LV cavity circumference is surrounded by myocardial tissue (right). By convention, this slice would be included in the calculation of LV volume. Since this rule is often difficult to use with confidence because of partial volume artifacts, it may affect CMR-derived LV volumes. We sought to determine to what extent the volume in question,  V (middle panel), would effect LV volume measurements in a group of consecutive patients.
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