基于N线模型的超声探头自动标定方法

doi:10.3969/j.issn.0258-8021. 2014. 02.007

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Abstract In the ultrasound guided intervention, the imaging plane is tracked using a 3D spatial tracking device, hence it is necessary to determine the transform between the ultrasound probe and the attached position sensor by calibration. The accuracy of calibration has significant impacts on the overall accuracy of ultrasound guidance. The widely used calibration method based on Nphantom requires extracting fiducial points manually in ultrasound images. The conventional manual approach is prone to subjective pickup errors and mistakes in labeling as well as timeconsuming. In this paper, an automatic method, which searches and identifies Nfiducials based on position prediction, is presented. Experimental results showed that the proposed method improves calibration precision to 0.63 mm and accuracy to 1.80 mm, compared to 1.57 mm and 2.66 mm of the conventional method, respectively. The average processing time on each frame is 0.067 s, which is much less than that of manual processing.

Key words： probe calibration Nphantom fiducial extraction neighborhood search

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	LI WenJun DING Hui WANG GuangZhi^*

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LI WenJun DING Hui WANG GuangZhi^*. An Automatic Method for Ultrasound Probe Calibration Based on NPhantom[J]. journal1, 2014, 33(2): 178-185.

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http://cjbme.csbme.org/EN/10.3969/j.issn.0258-8021. 2014. 02.007 OR http://cjbme.csbme.org/EN/Y2014/V33/I2/178

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