Purpose To investigate the applied value of tissue harmonic imaging (THI) in peri-ampulla obstruction.

目的探讨组织谐波成像技术在壶腹周围梗阻的应用价值。

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Objective To explore the value of tissue harmonic imaging (THI) in the diagnosis of acute myocardial infarction.

目的探讨组织谐波成像(THI)技术在急性心肌梗死诊断中的应用价值。

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Objective: To evaluate the effect of the tissue harmonic imaging (THI) on image quality and construction measurement.

目的：探讨组织谐波成像技术(THI)对图像质量及结构测量值的影响。

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