Fig. 1

Example of image quality and visual depiction of quantification process. Two slice locations imaged during severe arrhythmia demonstrate the corruption of conventional CMR during A end-diastole and B end-systole. Real-time imaging does not demonstrate corruption at C end-diastole and D) end-systole. Panels E-H illustrate the active contour segmentation (ACS) process. The short axis image is shown in the top row. The second and third rows illustrate projections along time. E Image sequences are loaded as 3D volumes (2D + t) into software. F The user defines an intensity threshold, which defines the endocardial border and results in a feature image. G Region growing is then performed inside the feature image. H The resulting segmentation can be manually corrected for any errors