Objective: to explore the significance of tissue Doppler imaging (TDI) that make noninvasive assessment of right ventricular diastolic function.
目的：探讨组织多普勒显像(TDI)技术评价肺动脉高压患者右室舒张功能的临床意义。
Objective: To promote rational antibacterials and the application of the trend investigate and make an objective assessment.
目的：为了推动合理用药，对抗菌药的应用情况及趋势进行调查并作出客观评估。
Objective to make an objective phonation assessment for the patients who can use esophageal phonation after total laryngectomy.
目的观察喉全切除食管发音患者的语音声学特征。
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