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Table 1 Images, score and each of the four operator’s average score for target images: parasternal long axis (PLAX) without and with color Doppler, parasternal short axis (PSAX) at two levels mitral and papillary, Apical 4 chamber without and with color Doppler, Mitral Valve (MV) Doppler flow

From: Virtual guidance: a new technique to empower point-of-care ultrasound in remote or extreme environments

Target images

Operator 1

Operator 2

Operator 3

Operator 4

Total points

PLAX

11.5

9.5

11.5

10.8

PLAX color

24.0

23.5

24.0

10.5

20.5

PSAX mitral

26.0

11.0

18.5

PSAX papillary

25.5

17.0

24.5

16.0

20.8

Apical 4

20.0

23.0

21.0

16.0

16.25

Apical 4 color

15.0

17.5

14.0

15.5

MV Doppler

22.5

18.5

12.5

17.8

Avg. points

21.4

19.75

19.5

13.1