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Biomedical Paper Registration of 3D CT and Ultrasound Datasets of the Spine using Bone Structures
BibTeX
@MISC{Brendel_biomedicalpaper,
author = {B. Brendel and Dipl Ing and S. Winter and A. Rick and Ph. D and M. Stockheim and H. Ermert and Ph. D},
title = {Biomedical Paper Registration of 3D CT and Ultrasound Datasets of the Spine using Bone Structures},
year = {}
}
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Abstract
Objective: In navigated orthopedic surgery, accurate registration of bones is of major interest. Usually, this registration is performed using landmarks positioned directly on the bone surface. These landmarks must be exposed during surgery. Our goal is to avoid the exposure of bone surface for the sole purpose of registration by using an intraoperative ultrasound device that can localize the bone through tissue. Method: We propose an algorithm for the registration of CT and ultrasound datasets that takes into account the fact that ultrasound produces very noisy images (speckle) and shows only parts of the bone surface. This part is made from the CT dataset. Next, a surface volume registration is performed by searching for a position of the estimated surface that maximizes the average gray value of the voxels in the ultrasound dataset covered by the surface. Results: The algorithm was implemented and validated using an ex vivo preparation of a human lumbar spine with surrounding muscle tissue. On the basis of this data, the method has a large radius of convergence and a repeatability of 0.5 mm for displacement and 0.5 degrees for rotation. Conclusions: A robust algorithm for the registration of 3D CT and ultrasound datasets is presented. The computation time seems sufficiently short to permit intraoperative use. Comp Aid Surg 7:146–155 (2002). ©2002 Wiley-Liss, Inc. Key words: registration; intraoperative imaging; ultrasound; spine; orthopedic surgery
Keyphrases
ultrasound datasets bone structure biomedical paper registration bone surface human lumbar spine large radius orthopedic surgery muscle tissue intraoperative use robust algorithm intraoperative imaging navigated orthopedic surgery average gray value intraoperative ultrasound device noisy image surface volume registration ex vivo preparation computation time major interest ct dataset comp aid surg key word ultrasound dataset sole purpose estimated surface accurate registration
