Sensorless freehand 3D ultrasound in real tissue: Speckle decorrelation without fully developed speckle
Sensorless freehand 3D ultrasound in real tissue: Speckle decorrelation without fully developed speckle
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DOI：
10.1016/j.media.2005.08.001
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发表时间：
2006-04-01
影响因子：
10.9
通讯作者：
Prager, RW
中科院分区：
文献类型：
--
作者：
Gee, AH;Housden, RJ;Prager, RW
先前已经证明，通过测量帧与帧之间的高程散斑去相关，可以在没有位置传感器的情况下获得徒手 3D 超声。然而，这要求 B 扫描包含大量完全发育的散斑。在本文中，我们表明在真实组织的扫描中很少满足这一条件，而是表现出相当普遍的相干散射。通过检查轴向和横向相关函数，我们提出了一种启发式技术来量化 B 扫描中每个点的相干性。这导致了适应的高度去相关方案，其允许相干散射。使用适应的方案，我们证明了动物组织体外重建的显着改善。 (C) 2005 Elsevier B.V. 保留所有权利。
It has previously been demonstrated that freehand 3D ultrasound can be acquired without a position sensor by measuring the elevational speckle decorrelation from frame to frame. However, this requires that the B-scans contain significant amounts of fully developed speckle. In this paper, we show that this condition is rarely satisfied in scans of real tissue, which instead exhibit fairly ubiquitous coherent scattering. By examining the axial and lateral correlation functions, we propose an heuristic technique to quantify the amount of coherency at each point in the B-scans. This leads to an adapted elevational decorrelation scheme which allows for the coherent scattering. Using the adapted scheme, we demonstrate markedly improved reconstructions of animal tissue in vitro. (C) 2005 Elsevier B.V. All rights reserved.