Effect of fiducial configuration on target registration error in image-guided cranio-maxillofacial surgery1☆
Objective: To investigate the effect of the configuration of fiducials on target registration error (TRE) and test the accuracy of theoretical model of TRE prediction in image-guided craniomaxillofacial surgery. Methods: A skull specimen was prepared with 20 titanium microscrews placed at defined locations and scanned with a 64-slice spiral computed tomography unit. These markers were separated into a registration fiducial group and a target fiducial group. An optical tracking system was used to perform skull-to-image registration procedures. Subsequent to each registration, the TRE was calculated by the navigation system. Each configuration registration was performed 50 times and the average was regarded as TRE of the configuration. The TRE prediction was also calculated for each configuration. Results: The TRE ranged from 0.58 mm to 3.88 mm. Relatively smaller values of TRE may be achieved by placing a majority of fiducials on the maxillary alveolus in proximity to the target and placing a small number on the cranium contralaterally. The TRE values are always larger than the corresponding TRE prediction but there is a high correlation between them. Conclusion: The configuration of fiducials is an important factor in minimizing TRE and the TRE prediction is a good guide for fiducial marker placement.
Image-guided surgery Target registration error Registration
Wenbin Zhang Chenhao Wang Hongbo Yu Yuncai Liu Guofang Shen
Department of Oral and Maxillofacial Surgery. Ninth Peoples Hospital, Shanghai Jlao Tong University Institute of Image Processing and Pattern Recognition at Shanghai. China
国际会议
上海
英文
251-257
2011-12-28（万方平台首次上网日期，不代表论文的发表时间）