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find Author "陈宪" 6 results
  • Application of Single-dose Contrast-enhanced Magnetic Resonance in Carotid Arteriography

    目的 探讨常规注射速率下单倍剂量对比剂在颈部三维对比增强磁共振血管成像(3D-CEMRA)中的可行性及临床应用价值。 方法 2011年8月-11月,连续纳入30例临床怀疑颈动脉或椎动脉狭窄并要求颈部磁共振血管成像检查的患者,随机分成A、B两组(每组各15例)。使用西门子Magnetom Avanto 1.5 T磁共振成像仪及其配备的颈部线圈和头部线圈进行CEMRA成像。A组使用双倍剂量对比剂(0.2 mmol/kg),B组使用单倍剂量对比剂(0.1 mmol/kg)。用三维快速小角度激发序列进行颈部血管成像。由2位有丰富经验的高年资医生对两组原始图像的信噪比以及最大密度投影(MIP)图像的质量进行评价,并对结果进行统计学分析和处理。 结果 A、B两组的所颈动脉信噪比分别为189.95 ± 71.31、175.07 ± 68.61,差异无统计学意义(t=?0.566,P=0.576);所得的MIP图像质量均达到优良,差异无统计意义(χ2=0.180,P=0.671)。 结论 与双倍剂量相比,单倍剂量对比剂获得颈部血管的图像清晰,能够满足临床诊断要求。

    Release date:2016-09-08 09:16 Export PDF Favorites Scan
  • Lymphatic Nodal Spreading of Gallbladder CarcinomaCT and MR Imaging Features

    ObjectiveTo investigate the CT and MR imaging features and distribution characteristics of lymphatic nodal involvement in patients with gallbladder carcinoma. MethodsThirtyseven histopathologically proven cases of gallbladder carcinoma with regional lymphatic nodal enlargement in upper abdomen were included into the study. The lymph nodal short diameter of equal to or larger than 10 mm was used as the criteria for positive lymphadenopathy. Thirtyone cases underwent contrastenhanced spiral CT scanning, 6 cases had MR imaging studies. CT and MR images were jointly evaluated by three radiologists with especial attention to the size and location of enlarged lymph nodes in upper abdomen.ResultsThe enlarged lymph nodes were observed in four anatomic locations in the upper abdominal region. ①The retroportal and retropancreatic group in which lymph nodes were located along the cystic duct and common bile duct, in the portocaval space and behind the pancreatic head. ②The celiac group in which enlarged nodes distributed along the common hepatic artery and surrounded the celiac trunk. ③The mesenteric group in which lymph nodes assembled at the mesenteric root and around the superior mesenteric vessels. ④The abdominal aorta group in which lymph nodes scattered at the left side of abdominal aorta and in the aortocaval space at the level of the left renal vein. The spiral CT visualization rates for the above 4 groups of lymphadenopathy were 89.1%(33/37), 78.3%(29/37), 29.8%(11/37) and 51.3%(19/37) respectively.ConclusionCT and MR can clearly depict the four location sites of lymphadenopathy in patients with gallbladder carcinoma, which closely reflects the three major lymphatic spreading pathways of gallbladder carcinoma, namely, the cholecystoretropancreatic, cholecystoceliac and cholecystomesenteric routes.

    Release date:2016-08-28 04:47 Export PDF Favorites Scan
  • Evaluation of Mutidetector Computer Tomography in Diagnosing TN Staging and Typing of Adenocarcinoma of Esophagogastric Junction

    Objective To evaluate the clinical value of multi-detector row helical CT (MDCT) in Diagnosing the TN staging and typing of adenocarcinoma of esophagogastric junction. Methods From January 2008 to June 2011,149 consecutive cases with AEG confirmed surgery were examined by using MDCT scanner before surgery in West China Hospital,pathologic and operative finding diagnosis were correlated with that results of MDCT . Results The accuracies of MDCT for the T1, T2, T3, and T4 staging was 97.3%,91.3%,84.5%, and 89.3%,respectively, and for the typing of Ⅰ,Ⅱ, andⅢwas 84.6%, 63.8%, and 79.2%,respectively. The accuracies of MDCT to judge the metastasis of lymph node was 88.6%(132/149). The feature of metastasis of lymph node with circular and fusion,significantly and obviously enhanced,ring and heterogeneous enhanced, which the positive rate of pathological metastasis was higher (P=0.000). Conclusions MDCT is an excellent diagnostic tool for the diagnosis of the TN staging and typing of AEG, which is useful for the selection of the surgical procedure and decision operation path.

    Release date:2016-09-08 10:37 Export PDF Favorites Scan
  • 医院信息系统-影像归档和通信系统/放射科信息系统-体检信息系统在数字化摄影体检中的临床应用

    目的探讨医院信息系统(HIS)-影像归档和通信系统/放射科信息系统(PACS/RIS)-体检信息系统在数字化摄影(DR)体检中的临床应用价值。 方法分析比较2012年7月-2013年6月与2013年7月-2014年6月PACS/RIS系统和HIS-PACS/RIS-体检信息系统在DR体检的工作流程、日平均体检工作量、单个部位平均检查时间及体检者信息管理。 结果HIS-PACS/RIS-体检信息系统在DR体检工作中较系统融合前少3个环节,日平均体检量增加35个部位,单个部位平均检查时间由1.12 min降至0.96 min,体检者信息管理更加便捷、高效。 结论HIS-PACS/RIS-体检信息系统在DR体检工作中优化了工作流程,缩短了单个部位的检查时间,提高了工作效率。

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  • Characterization Value of Focal Hepatic Lesions with Feridexs-Enhanced MR Imaging

    【Abstract】Objective To compare radiologists’ performance on combined unenhanced and feridexs-enhanced MR imaging (MRI) with their performance on helical CT enhanced, unenhanced MRI, and feridexs-enhanced MR alone imaging for the characteristics of local hepatic lesions. Methods MR images and CT scans obtained in 26 patients with 57 local hepatic lesions were analyzed with reviewer operator characteristic (ROC) curve analysis. The imaging of patient were divided into 4 groups including combined unenhanced and feridexs-enhanced MRI group, helical CT enhanced group, unenhanced MRI group, and feridexsenhanced MR alone group. Results The combined approach resulted in larger area under the ROC curve (Az=0.926 0) and accuracy (86.8%),P<0.05,as compared with the others methods. There were no significant differences among the other three methods. Conclusion Feridexs-enhanced MRI was more accurate than enhanced helical CT scan in characterization of local hepatic lesion. The combined analysis of unenhanced and feridexs-enhanced images was more accurate in the characterization of focal hepatic lesions than was review of feridexs-enhanced images alone.

    Release date:2016-08-28 04:44 Export PDF Favorites Scan
  • 大型医院放射科科室管理模式与方法探讨

    目前科室管理已成为医院管理的新热点,放射科作为现代医院重要医技科室,建立和完善其科室管理模式与制度已成为医院十分关注及迫切解决的重要课题。以四川大学华西医院放射科科室管理为例,对其实施的科室管理各项新举措进行了全面的探讨与总结,旨在与同行进行相互切磋与交流,共同促进医疗机构中放射科室管理的创新与发展。

    Release date:2016-09-08 09:17 Export PDF Favorites Scan
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