Purpose: To study the principle of ultrasound imaging.
前言： 目的：研究超声回波成像的原理；
Objective To study the value of ultrasound in incisional hernia before and after its operation.
目的探讨超声对切口疝修补手术前后检查的应用价值。
Objective to study the diagnostic value of ultrasound for extraperitoneal solid masses.
目的评价超声显像对腹腔脏器外实质性肿块的诊断价值。
Objective to study the diagnostic value of color ultrasound for stomach cancer.
目的探讨彩超在胃癌诊断中的价值。
Objective to study the diagnostic value of color ultrasound for stomach cancer.
目的探讨彩超在胃癌诊断中的价值。
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