Radiation treatment; Carotid Stenosis; Doppler ultrasonography; Nasopharyngeal carcinoma.

放射治疗；颈动脉狭窄；多普勒超声；鼻咽癌。

Preeclampsia; Color Doppler ultrasonography; Umbilical artery blood velocity; Perinatal outcome.

子痫前期； 彩色多普勒超声； 脐动脉血流比值； 围生儿预后。

Objective To evaluate the diagnostic value of color Doppler ultrasonography in malignant trophoblastic tumor.

目的探讨彩色多普勒超声对恶性滋养细胞肿瘤的诊断价值。

Objective : To evaluate the diagnostic value of color Doppler ultrasonography in malignant trophoblastic tumor.

目的: 探讨经阴道及经腹部彩色多普勒血流显像对恶性滋养层细胞瘤诊断的价值.

OBJECTIVE:To evaluate the effects of color Doppler ultrasonography on monitoring the complications of transplanted liver.

目的：评价彩色多普勒超声对肝移植后并发症的监测效果。

OBJECTIVE: To evaluate the effects of color Doppler ultrasonography on monitoring the complications of transplanted liver.

目的：评价彩色多普勒超声对肝移植后并发症的监测效果。

Objective To explore the value of color Doppler ultrasonography in diagnosis of arterial occlusion disease in lower limbs .

目的探讨彩色及频谱多普勒技术在诊断下肢动脉闭塞性疾病的价值。

Objective To explore the value of High frequency color doppler ultrasonography examination of colorectal cancer preoperative staging.

目的探讨高频彩超对结、直肠癌的术前分期诊断价值。

Besides these, both clinicians and doctors performing Color Doppler ultrasonography should pay attention to the calf intermuscular DVT.

下肢肌间静脉血栓的发生应该引起临床医师和B超医师的注意。

Objective To explore the value of color doppler ultrasonography in evaluating renal function reducibility in patients with severe hydronephrosis.

目的探讨运用彩色多普勒超声预测肾积水患者肾功能可复性的临床价值。