Motion artifacts of pulse inversion-based tissue harmonic imaging
Motion artifacts of pulse inversion-based tissue harmonic imaging
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DOI：
10.1109/tuffc.2002.1041536
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发表时间：
2002-09-01
影响因子：
3.6
通讯作者：
Li, PC
中科院分区：
文献类型：
--
作者：
Shen, CC;Li, PC
针对基于有限幅度失真的谐波成像，研究了脉冲反演技术的运动伪影。考虑了轴向和横向的运动。研究了两个性能问题。一个是相对于基波强度的谐波信号强度，另一个是频谱泄漏导致的潜在图像质量下降。还使用一维 (1-D) 基于相关性的校正方案来补偿运动伪影。结果表明组织谐波信号受组织运动的显着影响。对于轴向运动，组织谐波强度比横向运动下降得更快。轴向和横向运动的基本信号都会增加。因此，即使采用脉冲反转技术，仍然需要滤波来去除基波信号。由于未消除的光谱泄漏，该运动还可能降低对比度分辨率。此外，还表明，如果存在非轴向运动，一维运动校正是不够的。
Motion artifacts of the pulse inversion technique were studied for finite amplitude distortion-based harmonic imaging. Motion in both the axial and the lateral directions was considered. Two performance issues were investigated. One is the harmonic signal intensity relative to the fundamental intensity and the other is the potential image quality degradation resulting from spectral leakage. A one-dimensional (1-D) correlation-based correction scheme also was used to compensate for motion artifacts. Results indicated that the tissue harmonic signal is significantly affected by tissue motion. For axial motion, the tissue harmonic intensity decreases much more rapidly than with lateral motion. The fundamental signal increases for both axial and lateral motion. Thus, filtering is still required to remove the fundamental signal, even if the pulse inversion technique is applied. The motion also potentially decreases contrast resolution because of the uncancelled spectral leakage. Also, it was indicated that 1-D motion correction is not adequate if nonaxial motion is present.