Consistent evaluation of an ultrasound-guided surgical navigation system by utilizing an active validation platform

Younsu Kim; Sungmin Kim; Emad M. Boctor

doi:10.1117/12.2254464

3 March 2017 Consistent evaluation of an ultrasound-guided surgical navigation system by utilizing an active validation platform

Younsu Kim, Sungmin Kim, Emad M. Boctor

Author Affiliations +

Proceedings Volume 10135, Medical Imaging 2017: Image-Guided Procedures, Robotic Interventions, and Modeling; 1013524 (2017) https://doi.org/10.1117/12.2254464
Event: SPIE Medical Imaging, 2017, Orlando, Florida, United States

Abstract

An ultrasound image-guided needle tracking systems have been widely used due to their cost-effectiveness and nonionizing radiation properties. Various surgical navigation systems have been developed by utilizing state-of-the-art sensor technologies. However, ultrasound transmission beam thickness causes unfair initial evaluation conditions due to inconsistent placement of the target with respect to the ultrasound probe. This inconsistency also brings high uncertainty and results in large standard deviations for each measurement when we compare accuracy with and without the guidance. To resolve this problem, we designed a complete evaluation platform by utilizing our mid-plane detection and time of flight measurement systems. The evaluating system uses a PZT element target and an ultrasound transmitting needle. In this paper, we evaluated an optical tracker-based surgical ultrasound-guided navigation system whereby the optical tracker tracks marker frames attached on the ultrasound probe and the needle. We performed ten needle trials of guidance experiment with a mid-plane adjustment algorithm and with a B-mode segmentation method. With the midplane adjustment, the result showed a mean error of 1.62±0.72mm. The mean error increased to 3.58±2.07mm without the mid-plane adjustment. Our evaluation system can reduce the effect of the beam-thickness problem, and measure ultrasound image-guided technologies consistently with a minimal standard deviation. Using our novel evaluation system, ultrasound image-guided technologies can be compared under equal initial conditions. Therefore, the error can be evaluated more accurately, and the system provides better analysis on the error sources such as ultrasound beam thickness.

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Younsu Kim, Sungmin Kim, and Emad M. Boctor "Consistent evaluation of an ultrasound-guided surgical navigation system by utilizing an active validation platform", Proc. SPIE 10135, Medical Imaging 2017: Image-Guided Procedures, Robotic Interventions, and Modeling, 1013524 (3 March 2017); https://doi.org/10.1117/12.2254464

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KEYWORDS

Ultrasonography

Navigation systems

Optical tracking

Calibration

Error analysis

Data acquisition

Detection and tracking algorithms

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