Table 1.

Summary of dataset characteristics. No., Number; SD, standard deviation; LV, left ventricle

Characteristics	Module I		Independent Validation
	Training	Test
No. of studies	9	5	16
No. of mice	49	8	517
No. of images (quality assessment)	850	307	2111
No. of images (LV trace segmentation)	457	46	2111
Sex (% male)	51.02	37.50	49.03
Age (weeks of life)	12	12	12
Weight: mean, g (SD)	25.05 (3.73)	22.94 (3.50)	24.39 (3.13)
Genotype (% mutants)	46.94	37.5	52.88