二维码（扫一下试试看！） | | 基于电磁定位仪的超声图像中穿刺针实时跟踪软件开发 | | Development of Real-Time Tracking Software for Puncture Needle in Electromagnetic Locator Based Ultrasonic Image | | 投稿时间：2018-10-20 | | DOI：10.15918/j.tbit1001-0645.2019.s1.009 | | 中文关键词:电磁定位仪时间以及空间校准坐标变换均方误差 | | English Keywords:electromagnetic locatortime and spatial calibrationtransformation of coordinatemean square error | | 基金项目:科技部"十三五"国家重点研发计划项目（2017YFB1303100） | | | 摘要点击次数:3930 | | 全文下载次数:301 | | 中文摘要: | | 文中利用高精度电磁定位仪实时跟踪超声探头和穿刺针，开发用于穿刺导引的实时跟踪软件.文中使用NDI Aurora电磁定位仪实时获取穿刺针针尖的三维空间坐标，用PLUS toolkit从电磁定位仪和超声机采集数据，在完成时间以及空间校准（针尖校准、体模校准、探头校准）的基础上，得到从电磁定位坐标系到超声图像坐标系的转换矩阵，进而将由电磁定位器获得的针尖坐标转换到超声图像中，并标注出针尖的位置.为了衡量算法的精确度，文中用人工的方法在图像中选取针尖坐标，多次取样做平均，然后以该坐标作为衡量的标准.文中采集多组数据，计算由转换矩阵得到的针尖坐标与标准之间的均方误差.结果表明，该方法的均方误差MSE为2.456 mm，在可接受范围内. | | English Summary: | | Ultrasonic puncture navigation plays an increasingly important role in tissue biopsy and surgical guidance. In this paper, high-precision electromagnetic locators were used to track ultrasound probes and puncture needles in real time, and real-time tracking software for puncture guidance was developed. Firstly, a NDI Aurora electromagnetic locator was used to acquire the three-dimensional coordinates of the puncture needle tip in real time, and the PLUS toolkit was used to acquire data from the electromagnetic locator and the ultrasound machine based on the completion time and spatial calibration (tip calibration, phantom calibration, and probe calibration).Then a conversion matrix was designed for the information got from the electromagnetic positioning coordinate system to the ultrasonic image coordinate system, and the position of the needle tip was converted into an ultrasonic image. Finally, to measure the accuracy of the algorithm, the coordinates of the needle tip in the image were manually selected, multiply samples were averaged, and the coordinate was taken as the standard of measurement. Multiple sets of data were collected and the mean square error (MSE) was calculated for the tip coordinates obtained from the transformation matrix and the standard coordinates. The results, for example MSE 2.456 mm, all are within the acceptable range. | | 查看全文查看/发表评论下载PDF阅读器 | |
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