Academic Journal of Computing & Information Science, 2020, 3(3); doi: 10.25236/AJCIS.2020.030313.
Jingbo Rong1, Yaosheng Lu2, *, Shucheng Qin2, Rongdan Zeng2
1 Guangzhou Lian-Med Technology Ltd, Guangzhou 510663, China
2 College of Information Science and Technology, Jinan University, Guangzhou 510632, China
*Corresponding Author: email@example.com
Geometric calibration aims to determine the transformation between the ultrasound image plane coordinate system and the sensor coordinate system attached to the probe. In order to solve the problem of obtaining high-accuracy and robust results intended for labor guidance usage, this study designed an automatic freehand ultrasound calibration system with minimal human interaction combined with electromagnetic tracking. In this system, a multilayer N-wire phantom was utilized, and an auxiliary bracket was designed to hold the ultrasound probe during data collection. Moreover, a completely automatic algorithm was proposed for fast image segmentation. Calibration quality was validated by calculating precision and accuracy. Results Extensive trials were also conducted. On average, the calibration accuracy was 1.42 mm, and the precision was 1.29 mm. These results suggest that precision and accuracy achieved with optimized multilayer N-wire phantoms can be more precise compared to other methods. Furthermore, the high-accurate and robust results demonstrate the freehand 3D ultrasound system can accurately track target anatomy during labor guidance.
Calibration, Electromagnetic tracking, Ultrasound, N-wire phantom
Jingbo Rong, Yaosheng Lu, Shucheng Qin, Rongdan Zeng. Geometric Calibration of Freehand Ultrasound System with Electromagnetic Tracking. Academic Journal of Computing & Information Science (2020), Vol. 3, Issue 3: 117-128. https://doi.org/10.25236/AJCIS.2020.030313.
 O. Dupuis, S. Ruimark, D. Corinne, et al (2005). Fetal head position during the second stage of labor: Comparison of digital vaginal examination and transabdominal ultrasonographic examination. Eur J Obstet Gynecol Reprod Biol, vol.123, no.2, p. 193-197.
 E. L. Melvaer, K. Morken and E. Samset (2012). A motion constrained cross-wire phantom for tracked 2D ultrasound calibration. Int J Comput Assist Radiol Surg, vol.7, no.4, p. 611-620.
 J. Kowal, C. A. Amstutz, Caversaccio M, et al. (2003). On the development and comparative evaluation of an ultrasound B-mode probe calibration method. Comput Aided Surg, vol.8, no.3, p. 107-119.
 D. F. Leotta (2004). An efficient calibration method for freehand 3-D ultrasound imaging systems. Ultrasound Med Biol, vol.30, no.7, p. 999-1008.
 R. W. Prager, R. N. Rohling, A. H. Gee and L. Berman (1998). Rapid calibration for 3-D freehand ultrasoun. Ultrasound Med Biol, vol. 24, no.6, p. 855-869.
 R. M. Comeau, A. F. Sadikot, A. Fenster and T. M. Peters (2000). Intraoperative ultrasound for guidance and tissue shift correction in image-guided neurosurgery. Med Phys, vol. 27, no.4, p. 787-800.
 T. K. Chen, A. D. Thurston, R. E. Ellis and P. Abolmaesumi (2009). A real-time freehand ultrasound calibration system with automatic accuracy feedback and control. Ultrasound Med Biol, vol.35, no.1, p. 79-93.
 P. W. Hsu, R. W. Prager, A. H. Gee, G. M. Treece, et al. (2008). Real-time freehand 3D ultrasound calibration. Ultrasound Med Biol, vol. 34, no.2, p. 239-251.
 RQ Yang, ZG Wang, SJ Liu and XM Wu (2013). Design of an Accurate Near Infrared Optical Tracking System in Surgical Navigation. J Lightwave Technol, vol.31, no.2, p. 223-231.
 G. Carbajal, A. Lasso, Á. Gómez and G. Fichtinger (2013). Improving N-wire phantom-based freehand ultrasound calibration. Int J Comput Assist Radiol Surg, vol.8, no.6, p. 1063-1072.
 M. Toews and W. M. Wells (2018). Phantomless Auto-Calibration and Online Calibration Assessment for a Tracked Freehand 2-D Ultrasound Probe. IEEE Trans Med Imaging, vol.37, no.1, p. 262-272.