Table 2 The average angular errors and accuracy scores of the conventional[1] and proposed method.

angular error[degree]

conventional method[1]

Japanese healthy volunteer data

3.39±1.98

8.74±5.30

8.81±5.74

11.02±6.41

Japanese clinical data

5.21±7.48

10.03±7.01

10.92±8.94

10.87±8.01

American clinical data

5.75±8.69

9.90±8.59

8.83±7.33

9.55±4.94

all data

4.75±6.65

9.54±7.01

9.51±7.42

10.50±6.56

proposed method

Japanese healthy volunteer data

3.39±1.98

5.12±3.44

7.15±4.51

5.46±3.65

Japanese clinical data

4.21±2.91

7.79±4.10

11.50±7.90

6.76±4.66

American clinical data

4.83±3.43

5.90±4.24

9.64±8.25

5.14±3.04

all data

4.12±2.85

6.25±4.05

9.38±7.20

5.79±3.87

accuracy score[scale:1-4]

conventional method[1]

Japanese clinical data(18/35)

3.74±0.55

3.47±0.69

3.82±0.46

3.76±0.54

proposed method

Japanese clinical data(18/35)

3.84±0.37

3.79±0.41

3.82±0.39

3.87±0.34