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大焦距周向X射线探伤技术在低温储罐中的应用 被引量:1
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作者 王龙岗 《无损检测》 2013年第4期18-20,52,共4页
X射线周向曝光技术因为一次可以完成360°周向曝光,拍片效率高,横向裂纹检出率高,所以在压力容器、锅炉、管道环缝射线检测的应用越来越广泛。但随着焦距增大射线入射强度显著下降,在保证相同曝光量条件下如何选择发射管电压和曝光... X射线周向曝光技术因为一次可以完成360°周向曝光,拍片效率高,横向裂纹检出率高,所以在压力容器、锅炉、管道环缝射线检测的应用越来越广泛。但随着焦距增大射线入射强度显著下降,在保证相同曝光量条件下如何选择发射管电压和曝光时间成为大焦距周向射线探伤的难点。以某空分装置两台低温储罐为例介绍了大焦距(F=10m)周向X射线探伤技术的应用情况。 展开更多
关键词 射线检测 定向曝光 周向曝光 大焦距
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Focal peliosis hepatis in a colon cancer patient resembling metastatic liver tumor 被引量:1
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作者 Wu-Jun Xiong Li-Juan Hu +4 位作者 Yi-Cheng Jian Yi He Wei Zhou Xin-Lai Guo Ya-Xin Zheng 《World Journal of Gastroenterology》 SCIE CAS CSCD 2012年第41期5999-6002,共4页
Peliosis hepatis(PH) is a rare benign condition characterized by the presence of multiple,randomly distributed,blood filled cystic areas of variable size within the liver parenchyma.PH is difficult to recognize and ma... Peliosis hepatis(PH) is a rare benign condition characterized by the presence of multiple,randomly distributed,blood filled cystic areas of variable size within the liver parenchyma.PH is difficult to recognize and may be mistaken for neoplasm,metastases or multiple abscesses.A 75-year-old female with a previous history of colon cancer was admitted when a liver mass in the right liver lobe was found 11 mo after surgery during the follow-up period.Computed tomography and magnetic resonance imaging scan of the abdomen were performed.The initial possible diagnosis was metastatic hepatocellular carcinoma.The patient underwent excision of the hepatic segment where the nodule was located.The pathological diagnosis of the surgical specimen was PH.PH should be considered in the differential diagnosis of new liver lesions in patients whose clinical settings do not clearly favor metastasization.Clinicians and radiologists must recognize these lesions to minimize the probability of misdiagnosis and inappropriate treatment. 展开更多
关键词 Differential diagnosis Metastatic liver tumor Peliosis hepatis
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