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30例中心型肺癌患者术前进行了经食管彩色多普勒超声检查，对其中20例手术难易度，能否根治做出了较准确评价，准确率为83．3％（20／24）。经食管彩色多普勒超声能实时、动态的观察肿物的血供、肿物与大血管的关系，以及观测血管周围的淋巴结是否肿大，故结果可靠，评价是可信赖的。
Thirty patients with central lung cancer underwent transesophageal color Doppler ultrasonography before surgery. Twenty of the patients were evaluated for difficulty in operation and whether they could be cured. The accuracy rate was 83.3% (20/24). . Transesophageal color Doppler ultrasound can real-timely and dynamically observe the relationship between the blood supply of the tumor, the tumor and the large blood vessels, and the observation of whether the lymph nodes around the blood vessels are swollen. Therefore, the results are reliable and the evaluation is reliable.