TABLE 3.

Performance results of standard view identification.

View	Accuracy	Recall	Precision	Specificity	F1 score
subAS (95% CI)	0.9965 (0.9962–0.9969)	0.9485 (0.9452–0.9519)	0.9985 (0.9979–0.9991)	0.9999 (0.9998–0.9999)	0.9729 (0.9729–0.9729)
A4C (95% CI)	0.9975 (0.9972–0.9978)	0.9444 (0.9391–0.9497)	0.9788 (0.9754–0.9822)	0.9993 (0.9991–0.9994)	0.9613 (0.9613–0.9613)
LPS4C (95% CI)	0.9908 (0.9902–0.9914)	0.9163 (0.9109–0.9218)	0.8971 (0.8912–0.9031)	0.9946 (0.9943–0.9949)	0.9066 (0.9066–0.9067)
Sax-basal (95% CI)	0.9919 (0.9913–0.9924)	0.8413 (0.8341–0.8484)	0.9908 (0.9887–0.9928)	0.9996 (0.9995–0.9997)	0.9099 (0.9099–0.9099)
Mean	0.9942	0.9126	0.9663	0.9983	0.9377

subAS, subcostal atrium septum; A4C, apical four-chamber; LPS4C, low parasternal four-chamber.