Table 2.

Visual Evaluation Results for 15 Segmentation Outputs

Group	Studies	Number of cases rated 1	Number of cases rated 2	Number of cases rated 3	Number of cases rated 4	Average rating
HF-I	4	4	0	0	0	1
HF-NI	4	3	1	0	0	1.25
HYP	4	2	2	0	0	1.5
Normal	3	2	1	0	0	1.33
Total	15	11	4	0	0	1.27

(Results are rated with a four-point scale (1: Excellent, little correction required; 2: Good, over 50% of contours are acceptable; 3: Poor, <50% of the contours are acceptable; and 4: Not usable). For group HF-I, all the results are visually excellent. Other groups have some small problems, but all are in good category, which means that most of the contours segmented are acceptable to experienced cardiologists; only small corrections are needed