【作者】 周围；

【导师】 全显跃；

【作者基本信息】 第一军医大学 ， 影像医学与核医学， 2006， 硕士

【摘要】 研究目的 1、探讨64层螺旋CT肝动脉血管成像技术，比较不同扫描启动时间与不同浓度对比剂两因素对CTA成像质量的影响。 2、研究CTA对肝动脉正常解剖和变异的显示及对临床指导价值。 3、探讨肝内常见占位性病变及肝癌异位侧支供血的CTA血管表现。 材料与方法 1、病例组成：选择临床可疑肝脏占位病变的60例患者行64排螺旋CT多期扫描，其中动脉早期扫描时间为CTA扫描启动时间。男35例，女25例，平均56.4岁。病例组成为四种：原发性肝癌(PHC)组25例，肝转移瘤(MHT)组21例，肝血管瘤(HCH)组13例，局灶性结节样增生(FNH)1例。 2、研究分组：根据不同扫描启动时间和不同浓度对比剂共分为四组，每组15例，共60例。A组：小剂量预注射试验300mgI／ml组；B组：小剂量预注射试验370mgI／ml组：C组：经验时间注射组300mgI／ml组；D组：经验时间注射组370mgI／ml组。根据所得腹主动脉CT值的测量结果是否存在统计学差异探讨不同时间和不同浓度对比剂两个因素对CTA成像质量的影响。 3、检查方法：(1)平扫：所有患者检查前口服清水500～1000ml，平扫取仰卧位，取头足方向扫描，范围自肝顶至肾下极。扫描参数：电压120kV，电流250mAs，更多还原

【Abstract】 Objective1. To study the technique control of computed tomography angiography(CTA) of hepatic artery in 64- detector row helical CT, comparing the imaging quality of CTA by adopting different starting time of scan and concentrations of contrast agent.2. To study the normal anatomy and anatomical variation of hepatic artery and the clinic applications of the variations by CTA.3. To discuss the manifestation of the feeding-artery of common focal hepatic lesions and the abnormality branch blood-supply for primary hepatic carcinoma by the use of CTA.Materials and methods1. Patient data: 60 patients who had clinically been suspected hepatic neoplasms underwent CTA examination by 64- detector row helical CT. They included 35 men and 25 women, and the average age was 56.4 years. The final diagnoses of the patients were primary hepatic carcinoma(n=25), metastatic hepatic tumor(n=21), hepatic cavernous hemangioma(n=13), focal nodular hyperplasia(n=1).2. Study groups: All patients were separated into 4 groups with the same cases in each group according to the starting time of scan and the concentrations of contrast agent ,15 cases in each group. Group A: small dose experimental injection of 300 mgI/ml; Group B: small dose experimental injection of 370 mgI/ml; Group C:更多还原