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Table 2 Error of virtual and real registration based on improved identification method (mm)

From: Optimization of virtual and real registration technology based on augmented reality in a surgical navigation system

Group

Point

Mark points on the real model

Mark points on the virtual model

Coordinate error

Error (mm)

Average error (mm)

p-value

X

Y

Z

X

Y

Z

X

Y

Z

A

P1

− 138.41

− 153.00

− 1381.74

− 139.57

− 152.82

− 1384.68

1.16

0.18

2.93

3.16

3.52

0.65

P2

− 152.42

− 72.01

− 1377.30

− 149.08

− 69.94

− 1376.99

3.35

2.07

0.31

3.95

P3

− 120.67

− 134.73

− 1349.59

− 123.99

− 133.29

− 1351.58

3.32

1.44

1.98

4.13

P4

− 175.34

− 81.00

− 1424.07

− 176.85

− 80.06

− 1424.46

1.52

0.40

2.40

2.86

B

P1

− 62.10

185.31

− 1390.53

− 64.94

184.02

− 1390.24

2.84

1.29

0.29

3.13

3.36

P2

− 28.07

149.31

− 1328.60

− 30.94

148.22

− 1328.02

2.87

1.09

0.58

3.20

P3

− 0.91

202.92

− 1280.62

− 1.94

201.79

− 1277.72

1.03

1.13

2.90

3.28

P4

− 84.33

191.37

− 1424.81

− 80.02

189.98

− 1424.76

4.31

1.39

0.05

3.83

C

P1

− 37.84

186.61

− 1352.84

− 40.17

− 184.76

− 1352.93

2.33

1.85

0.09

2.97

3.53

0.60

P2

− 36.07

178.86

− 1307.83

− 38.87

176.72

− 1307.93

2.80

2.14

0.10

3.52

P3

− 65.96

259.36

− 1381.28

− 67.42

258.92

− 1384.73

1.46

0.44

3.45

3.77

P4

− 108.21

− 63.52

− 1210.20

− 110.43

− 60.58

− 1211.05

2.22

2.94

0.85

3.84

D

P1

− 87.14

119.06

− 1316.18

− 84.64

121.76

− 1317.87

2.50

2.70

1.69

4.32

3.73

P2

− 77.20

112.31

− 1270.39

− 74.86

108.97

− 1268.34

2.34

3.34

2.05

4.28

P3

− 39.13

139.35

− 1250.14

− 40.71

141.02

− 1246.47

1.58

1.67

3.67

3.13

P4

− 72.09

89.47

− 1294.83

− 70.64

91.45

− 1291.38

1.45

1.98

3.45

3.21