Automated 3D Freehand Ultrasound Calibration with Real-Time Accuracy Control
3D ultrasound (US) is an emerging new imaging technology that appeals to more and more applications in intraoperative guidance of computer-assisted surgery. In a freehand US imaging system, US probe calibration is typically required to construct a 3D image of the patient’s anatomy from a set of 2D US images. Most of the current calibration techniques concern primarily with the precision and accuracy. However, for computer-assisted surgeries that may require a calibration task inside the operating room (OR), many other important aspects have to be considered besides accuracy. In this paper, we propose a novel system for automated calibration that is optimized for the OR usage with real-time feedback and control of the calibration accuracy. We have also designed a novel N-wire phantom, with greatly reduced complexity to facilitate mass production without compromising the accuracy and robustness.
KeywordsInput Image Automate Segmentation Target Registration Error Calibration Accuracy Probe Calibration
- 2.Boctor, E., Lordachita, I., Choti, M., Hager, G., Fichtinger, G.: Bootstrapped ultrasound calibration. Stud. Health Technol. Inform. 119, 61–66 (2006)Google Scholar
- 6.Zhang, Y.: Direct surface extraction from 3D freehand ultrasound images. Master’s thesis, The University of British Columbia (UBC), Vancouver, British Columbia, Canada (2002)Google Scholar
- 7.Chen, T.K., Abolmaesumi, P., Ellis, R.E.: An easy-to-use phantom with reduced complexity for automated freehand ultrasound calibration in the operating room and large-scale cost-effective manufacture. In: Langlotz, F., Davies, B.L., Ellis, R.E. (eds.) Proceedings of 6th Annual Meeting of the International Society for Computer Assisted Orthopaedic Surgery, Montréal, Canada, pp. 89–92 (2006)Google Scholar