Table 6.

Anatomical landmark localization distance errors and valve and septal plane angulation errors in the validation set

Cardiac view and anatomical landmark	Distance error (mm)	Plane	Angulation error (°)
3Ch view
MV Insert 1	7.1 ± 3.4	MV	14.3 ± 12.2
MV Insert 2	6.4 ± 3.3
AV Insert 1	10.8 ± 7.5	AV	19.5 ± 17.0
AV Insert 2	9.8 ± 7.5
4Ch view
MV Insert 1	4.3 ± 2.6	MV	7.1 ± 5.7
MV Insert 2	6.0 ± 3.3
TV Insert 1	4.9 ± 2.7	TV	10.2 ± 13.1
TV Insert 2	5.0 ± 3.4
LV Apex	6.2 ± 3.6
RVOT view
PV Insert 1	13.6 ± 8.1	PV	48.7 ± 37.8
PV Insert 2	17.0 ± 10.4
SAx view
RV Insert 1	5.9 ± 5.3	Septal	8.7 ± 13.5
RV Insert 2	5.0 ± 3.2

Distance and angulation errors are reported as mean ± standard deviation. 3Ch: three-chamber; 4Ch: four-chamber; RVOT: right ventricular outflow tract; SAx: short axis; LV: left ventricular; RV: right ventricular; MV: mitral valve; AV: aortic valve; TV: tricuspid valve; PV: pulmonary valve