3.0T MR门静脉和下腔静脉血管成像对腹部肿瘤血管侵犯的评价

目的]探讨阴道镜检查在宫颈病变诊断中的临床价值.方法]2007年6月至2009年6月诊治275例宫颈病变患者,对其宫颈阴道镜及镜下活检结果进行分析.结果]经病理确诊为慢性宫颈炎221例,宫颈上皮内瘤变（CIN） 39例 （CIN Ⅰ10例、CINⅡ16例、CIN Ⅲ13例）,宫颈癌15例.阴道镜检查对CIN的灵敏度为69%,特异度为94%,阳性预测值为64.3%,阴性预测值为94.8%,阳性似然比为10.89,阴性似然比为0.33,诊断符合率为90.18%.阴道镜检查对宫颈癌的灵敏度为67%,特异度为98%,阳性预测值为71.4%,阴性预测值为98.1%,阳性似然比为43.33,阴性似然比为0.34,诊断符合率为96.73%.结论]阴道镜检查对宫颈癌尤其是癌前病变的早期诊断有重要的临床价值.

3.0T MR Portal Vein and Inferior Vena Cava Angiography in the Evaluation of Vascular Invasion of Abdominal Tumor

Objective] To explore the imaging characteristics and diagnostic value of contrast-enhancement magnetic resonance angiography（CE-MRA） of portal vein and inferior vena cava for evaluating the vascular invasion of abdominal tumor. Methods] The initial data of CE-MRA of portal vein and inferior vena cava of 47 patients with liver, pancreatic and retroperitoneal tumor were collected. MIP and thin-slice MPR were used to reconstruct the vascular imaging for the preoperative evaluation of the invasion. The evaluation results were contrasted to the operative results. The image findings of affected vessels were summarized. Results] The vascular invasion was found in 27 patients in which 18 patients had portal vein invasion, and 4 patients had hepatic vein invasion and 5 patients had inferior vena eava invasion. The specificity and sensitivity of CEMRA were 90.1 % and 94.4%, respectively. And its positive and negative predictive values were 80% and 96.6%, respectively. The main manifestations of vascular invasion were the sudden breaking off and stenosis of vessel lumen, nonvisulization of distal vessels, the defect of the vessel wall, concentric and eccentric filling defect and the formation of collateral circulation. Conclusion] Many methods of 3.0T CE-MRA for the reconstruction of blood vessels can clearly reveal portal vein, hepatic vein and inferior vena eava, which plays an important role in preoperative evaluation of the vessels of abdominal tumor.