利用运动受限的扫扇扫描进行 IMU 辅助手动三维超声成像

IF 2.5 4区 医学 Q1 ACOUSTICS Ultrasonic Imaging Pub Date : 2024-04-10 DOI:10.1177/01617346241242718
Aparna Harindranath, Komal Shah, Dhinagaran Devadass, Arun George, Kajoli Banerjee Krishnan, Manish Arora
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引用次数: 0

摘要

三维(3D)超声波成像可实现感兴趣平面的事后选择。三维超声波成像可通过摆动探头、矩阵探头和基于传感器的探头等设备进行。与 2D 成像系统相比,支持 3D 成像的超声波系统价格昂贵,硬件复杂度更高。惯性测量单元(IMU)可用于跟踪一维阵列探头的运动,并将其运动限制在一自由度(1-DoF)旋转(扫扇)范围内,从而实现三维成像。这项工作证明了经济实惠的 IMU 辅助手动三维超声扫描仪(IAM3US)的可行性。我们设计了一个消费级 IMU 辅助 3D 扫描仪原型,它有两个用于扫描扇的支撑结构。在对 IMU 进行适当校准后,基于 KF 的适当算法可估算出扫描过程中探头的方向。基于扫描线的改进重建方法被用于体积重建。通过对装满水的网球和胎儿模型的头部区域进行成像,对 IAM3US 系统进行了评估。从胎儿模型重建的体积中提取合适的二维平面,用于人工测量双顶径(BPD)。随后,收集体内数据。本文的新颖之处在于:(1)应用最近提出的算法对三维成像的扫描扇面进行方位估计,该算法是根据选定的消费级 IMU 的噪声特性选择的;(2)使用偏差检测器评估 1-DoF 扫描扇面的质量,同时监测扫描过程中的最大角速率;(3)两种探头支架设计,以帮助操作员执行 1-DoF 旋转运动;以及(4)端到端三维成像系统集成。对两名患者进行的模型研究和初步体内产科扫描说明了该系统在诊断方面的可用性。
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IMU-Assisted Manual 3D-Ultrasound Imaging Using Motion-Constrained Swept-Fan Scans
Three-dimensional (3D) ultrasonic imaging can enable post-facto plane of interest selection. It can be performed with devices such as wobbler probes, matrix probes, and sensor-based probes. Ultrasound systems that support 3D-imaging are expensive with added hardware complexity compared to 2D-imaging systems. An inertial measurement unit (IMU) can potentially be used for 3D-imaging by using it to track the motion of a one-dimensional array probe and constraining its motion in one degree of freedom (1-DoF) rotation (swept-fan). This work demonstrates the feasibility of an affordable IMU-assisted manual 3D-ultrasound scanner (IAM3US). A consumer-grade IMU-assisted 3D scanner prototype is designed with two support structures for swept-fan. After proper IMU calibration, an appropriate KF-based algorithm estimates the probe orientation during the swept-fan. An improved scanline-based reconstruction method is used for volume reconstruction. The evaluation of the IAM3US system is done by imaging a tennis ball filled with water and the head region of a fetal phantom. From fetal phantom reconstructed volumes, suitable 2D planes are extracted for biparietal diameter (BPD) manual measurements. Later, in-vivo data is collected. The novel contributions of this paper are (1) the application of a recently proposed algorithm for orientation estimation of swept-fan for 3D imaging, chosen based on the noise characteristics of selected consumer grade IMU (2) assessment of the quality of the 1-DoF swept-fan scan with a deflection detector along with monitoring of maximum angular rate during the scan and (3) two probe holder designs to aid the operator in performing the 1-DoF rotational motion and (4) end-to-end 3D-imaging system-integration. Phantom studies and preliminary in-vivo obstetric scans performed on two patients illustrate the usability of the system for diagnosis purposes.
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来源期刊
Ultrasonic Imaging
Ultrasonic Imaging 医学-工程:生物医学
CiteScore
5.10
自引率
8.70%
发文量
15
审稿时长
>12 weeks
期刊介绍: Ultrasonic Imaging provides rapid publication for original and exceptional papers concerned with the development and application of ultrasonic-imaging technology. Ultrasonic Imaging publishes articles in the following areas: theoretical and experimental aspects of advanced methods and instrumentation for imaging
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