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首页> 外文期刊>IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control >Performance Enhanced Ultrasound Probe Tracking With a Hemispherical Marker Rigid Body
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Performance Enhanced Ultrasound Probe Tracking With a Hemispherical Marker Rigid Body

机译：性能增强超声波探头跟踪，具有半球形标记刚体

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摘要

Among tracking techniques applied in the 3-D freehand ultrasound (US), the camera-based tracking method is relatively mature and reliable. However, constrained by manufactured marker rigid bodies, the US probe is usually limited to operate within a narrow rotational range before occlusion issues affect accurate and robust tracking performance. Thus, this study proposed a hemispherical marker rigid body to hold passive noncoplanar markers so that the markers could be identified by the camera, mitigating self-occlusion. The enlarged rotational range provides greater freedom for sonographers while performing examinations. The single-axis rotational and translational tracking performances of the system, equipped with the newly designed marker rigid body, were investigated and evaluated. Tracking with the designed marker rigid body achieved high tracking accuracy with 0.57 degrees for the single-axis rotation and 0.01 mm for the single-axis translation for sensor distance between 1.5 and 2 m. In addition to maintaining high accuracy, the system also possessed an enhanced ability to capture over 99.76% of the motion data in the experiments. The results demonstrated that with the designed marker rigid body, the missing data were remarkably reduced from over 15% to less than 0.5%, which enables interpolation in the data postprocessing. An imaging test was further conducted, and the volume reconstruction of a four-month fetal phantom was demonstrated using the motion data obtained from the tracking system.
机译：在3-D Freehand超声（US）中应用的跟踪技术中，基于相机的跟踪方法相对成熟并且可靠。然而，由制造标记刚体约束，美国探针通常限于在闭塞问题影响准确且稳健的跟踪性能的窄旋转范围内操作。因此，该研究提出了半球形标记刚体以保持被动性非平板标记，使得标记物可以通过相机识别，减轻自动阻塞。扩大的旋转范围在执行考试时为超声波创建提供更大的自由度。调查和评估系统的单轴旋转和平移跟踪性能，配备新设计的标记刚体。用设计的标记刚性主体跟踪，为单轴旋转的0.57度实现高的跟踪精度，单轴平移0.01 mm，用于12.5和2米之间的传感器距离。除了保持高精度之外，系统还具有增强的能力，可以在实验中捕获超过99.76％的运动数据。结果表明，通过设计的标记刚体，缺失的数据从超过15％降低至小于0.5％，这使得能够在后处理数据中的插值。进一步进行了成像测试，使用从跟踪系统获得的运动数据来证明四个月胎儿幻影的体积重建。

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