目的：研究自然组织谐波成像技术对超声图像的影响，旨在提高诊断率。
Objective:To investigate wather native tissue harmonic imaging(NTHI) can improve sonograph and increase diagnosis rate.
目的：通过与基波成像(FI)的对比，研究自然组织谐波成像(nthi)对冠心病节段运动观察的改善情况。
Objective: Compared to fundamental imaging (FI), we used native tissue harmonic imaging (NTHI) to improve image quality on regional wall movement of left ventricle in coronary disease.
目的：通过与基波成像(FI)的对比，研究自然组织谐波成像(nthi)对冠心病节段运动观察的改善情况。
Objective: Compared to fundamental imaging (FI), we used native tissue harmonic imaging (NTHI) to improve image quality on regional wall movement of left ventricle in coronary disease.
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