Limitations
The limitation of the study includes race and ethnicity were not
reported because of the limited data use agreement among centers in
which this information could not be collected. The 1 to 2 year-old
patients were difficult to recruit as they were the most uncooperative
patients and frequently cannot breath hold for image acquisition. We did
not record the amount of time we spent in acquiring the LV 3D datasets
as this can be quite variable depending on the state of the child’s
cooperation. However, the post-processing using semi-automated
contouring is feasible once a good dataset is acquired and does not
consume large amount of time making this clinically feasible to use.