3D Rigid Registration of Intraoperative Ultrasound and Preoperative MR Brain Images Based on Hyperechogenic Structures

Table 2

Target registration error in mm. The 𝑃 values correspond to Kruskal-Wallis test performed between the TRE obtained by experts and the TRE obtained with our method.

A priori estimation of the registration: target registration error in mm
Mean (std)	Expert 1	Method	𝑃 value	Expert 2	Method	𝑃 value	Expert 3	Method	𝑃 value
Patient 1	𝟐.𝟐𝟔(1.54)	𝟐.𝟐𝟓(0.48)	0.28	𝟐.𝟏𝟔(0.58)	𝟐.𝟎𝟑(0.53)	0.50	𝟏.𝟕𝟓(0.54)	𝟏.𝟔𝟑(0.58)	0.50
Patient 2	𝟏.𝟗𝟎(1.14)	𝟐.𝟏𝟏(0.86)	0.68	𝟐.𝟑𝟗(0.92)	𝟐.𝟑𝟗(0.50)	0.76	𝟐.𝟎𝟐(0.72)	𝟏.𝟖𝟗(0.84)	0.71
Patient 3	𝟏.𝟒𝟕(1.28)	𝟏.𝟔𝟒(0.59)	0.20	𝟏.𝟖𝟐(0.73)	𝟏.𝟖𝟒(0.42)	0.97	𝟏.𝟕𝟖(0.76)	𝟏.𝟕𝟗(0.64)	0.88