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題名 | Arachnoid Granulations--Computerized Tomography and Magnetic Resonance Imaging Features: A Case Report=蜘蛛膜粒:電腦斷層及磁振造影表徵 |
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作者 | 陳行素; 邵國寧; 姜仁惠; 張政彥; 羅兆寶; 凌憬峰; 鄧木火; Chen, Shing-su; Shao, Kuo-ning; Chiang, Jen-huey; Chang, Chang-yen; Lao, Chao-bao; Lirng, Jiing-feng; Teng, Michael MH; |
期刊 | 中華醫學雜誌 |
出版日期 | 19990100 |
卷期 | 62:1 1999.01[民88.01] |
頁次 | 頁46-50 |
分類號 | 415.812 |
語文 | eng |
關鍵詞 | 蜘蛛膜粒; 電腦斷層攝影; 硬腦膜竇; 磁振造影; Arachnoid granulations; Computerized tomography; Dural sinuses; Magnetic resonance imaging; |
中文摘要 | 我們報告1例蜘蛛膜粒的典型電腦斷層及磁振造影表徵。病人為一71歲女性,主 訴頭痛。電腦斷層可見在硬腦膜直、橫竇有邊緣平滑、低密度且沒有顯影增強現象的充填病 灶。在磁振造影時,蜘蛛膜粒的訊號在以T1為主的影像中,較腦實質低或與之相等;在以 質子密度為主的影像中為混雜訊號;在以T2為主的影像中則呈高訊號。上述情況大多數不 會有顯影增強現象。由於蜘蛛膜粒體積不大,因而通常在薄層切面時才容易被看到。也因為 它們一般不會引起任何症狀,因此不具臨床意義。但是因其有典型的電腦斷層及磁振造影表 徵,我們應該認識此結構,以避免誤診為硬腦膜橫竇內栓塞或腫瘤。 |
英文摘要 | A 71-year-old woman had arachnoid granulations found in the straight and transverse sinuses on computerized tomography (CT) and magnetic resonance imaging (MRI). The arachnoid granulations appeared as low-density masses on CT. They gave low signals on T1-weighted MR images and high signals on T2-weighted images. Arachnoid granulations are usually of no clinical significance. They have characteristic CT and MRI manifestations and should not be mistaken for sinus thrombosis or intrasinus tumors. |
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