3D ULTRASONIC IMAGE FEATURE LOCALIZATION BASED ON MAGNETIC SCANHEAD TRACKING - IN-VITRO CALIBRATION AND VALIDATION
3D ULTRASONIC IMAGE FEATURE LOCALIZATION BASED ON MAGNETIC SCANHEAD TRACKING - IN-VITRO CALIBRATION AND VALIDATION
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DOI：
10.1016/0301-5629(94)90052-3
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发表时间：
1994-01-01
影响因子：
2.9
通讯作者：
STRANDNESS, DE
中科院分区：
文献类型：
--
作者：
DETMER, PR;BASHEIN, G;STRANDNESS, DE
三维（3D）超声成像系统的基础是由市售的基于磁力计的位置和方向测量（POM）设备、标准B型超声仪器和个人计算机构成的。为了评估系统的性能，设计了一种新的方法，使用迭代，最小二乘技术，同时确定系统的校准参数，并测量其在三维空间中定位点的精度。当单独测试时，POM系统在系统的610 mm工作半径上定位单点，均方根（RMS）不确定性为1.4 mm至3.2 mm。当与超声仪器相结合时，定位点目标的RMS不确定性从2.1 mm到3.5 mm不等。这些结果建立了当定位基准解剖标志以重复检查身体的同一区域时，以及当从多个平面图像进行数值3D重建时，预期从该系统获得的可变性下限。
The basis of a three-dimensional (3D) ultrasound imaging system was constructed from a commercially available magnetometer-based position and orientation measurement (POM) device, a standard B-Mode ultrasound instrument and a personal computer. To evaluate the system's performance, a novel method was devised using an iterative, least-squares technique to simultaneously determine the system's calibration parameters and measure its precision in locating points in three-dimensional space. When tested separately, the POM system located single points with a root mean squared (RMS) uncertainty of from 1.4 mm to 3.2 mm over the 610 mm working radius of the system. When combined with the ultrasound instrument, the RMS uncertainty in locating point targets varied from 2.1 mm to 3.5 mm. These results establish the lower limits of variability to be expected from this system when locating fiducial anatomical landmarks for repeated examinations of the same region of the body, and when making numerical 3D reconstructions from multiple planar images.