duplex doppler sonography
duplex doppler sonography
双多普勒超声
以上为机器翻译结果，长、整句建议使用 人工翻译 。
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Methods Portal venous blood flow, hepatic arterial blood flow and resistance index(RI) were determined by duplex Doppler sonography in 56 patients subjected to liver transplantation.
方法应用彩色多普勒超声对56例肝移植患者术前及术后移植肝门静脉、肝动脉血流及肝动脉阻力系数（RI）进行监测。
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