. Author manuscript; available in PMC: 2013 Nov 25.

Published in final edited form as: IEEE Trans Med Imaging. 2005 Jun;24(6):10.1109/TMI.2005.848373. doi: 10.1109/TMI.2005.848373

TABLE III.

In Vivo Shift Tracking Results.

Target Point	Brain shift measurements
	OPTOTRAK	Shift tracking			Manual
	OPTOTRAK	Calc.	STE	Θ	Calc.	STE	Θ

1	13.5	15.2	9.5	0.67	13.2	1.8	0.13
2	8.7	8.3	4.9	0.59	8.8	1.3	0.14
3	7.8	9.3	3.1	0.32	10.0	3.2	0.27
4	4.6	4.2	2.8	0.63	5.6	1.4	0.21

RMS	9.2	10.5	5.7	0.57	9.8	2.1	0.20
RMS w/o Target #1	7.3	7.6	3.7	0.53	8.3	2.2	0.21

There Were Four Targets Acquired During Surgery, They Are Listed Row-Wise. For Each Target, a Shift Measurement Was Made Using the OPTOTRAK, the Shift-Tracking Protocol and Also Via Manual Localization of Targets on the Serial LRS Dataset. Magnitudes for These Shift Vectors Are Shown in Columns 2, 3, and 6 for OPTORAK, the Shift-Tracking Protocol, and Manual Localization, Respectively. Columns 4 and 5 Relate the Performance of the Shift-Tracking Protocol Relative to the OPTOTRAK Using STE and Θ Angle Deviation, Respectively. Columns 7 and 8 Relate the Performance of Manual Localization of Shift Targets Relative to OPTOTRAK Measurements Using STE and Θ, Respectively. The Last Two Rows of the Table List the rms Measurements With and Without Target Point #1. This Point Was Identified as an Outlier in Post-Processing