22 March 2007 Target error for image-to-physical space registration: preliminary clinical results using laser range scanning
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Abstract
In this paper, preliminary results from an image-to-physical space registration platform are presented. The current platform employs traditional and novel methods of registration which use a variety of data sources to include: traditional synthetic skin-fiducial point-based registration, surface registration based on facial contours, brain feature point-based registration, brain vessel-to-vessel registration, and a more comprehensive cortical surface registration method that utilizes both geometric and intensity information from both the image volume and physical patient. The intraoperative face and cortical surfaces were digitized using a laser range scanner (LRS) capable of producing highly resolved textured point clouds. In two in vivo cases, a series of registrations were performed using these techniques and compared within the context of a true target error. One of the advantages of using a textured point cloud data stream is that true targets among the physical cortical surface and the preoperative image volume can be identified and used to assess image-to-physical registration methods. The results suggest that iterative closest point (ICP) method for intraoperative face surface registration is equivalent to point-based registration (PBR) method of skin fiducial markers. With regard to the initial image and physical space registration, for patient 1, mean target registration error (TRE) were 3.1±0.4 mm and 3.6 ±0.9 mm for face ICP and skin fiducial PBR, respectively. For patient 2, the mean TRE were 5.7 ±1.3 mm, and 6.6 ±0.9 mm for face ICP and skin fiducial PBR, respectively. With regard to intraoperative cortical surface registration, SurfaceMI outperformed feature based PBR and vessel ICP with 1.7±1.8 mm for patient 1. For patient 2, the best result was achieved by using vessel ICP with 1.9±0.5 mm.
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Aize Cao, Aize Cao, Michael I. Miga, Michael I. Miga, P. Dumpuri, P. Dumpuri, S. Ding, S. Ding, B. M. Dawant, B. M. Dawant, R. C. Thompson, R. C. Thompson, } "Target error for image-to-physical space registration: preliminary clinical results using laser range scanning", Proc. SPIE 6509, Medical Imaging 2007: Visualization and Image-Guided Procedures, 65091D (22 March 2007); doi: 10.1117/12.711496; https://doi.org/10.1117/12.711496
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