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題名 | 用電腦斷層血管攝影曲線多平面重組法和軸位切面影像評估頸動脈狹窄=Evaluation of Carotid Artery Stenosis with Axial Computed Tomography (CT) Images and Curved Multiplanar Reformation (CMPR) CT Angiography |
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作者 | 陳加興; 龔顯琦; 陳啟昌; 李三剛; 謝彩堂; | 書刊名 | 中華放射線醫學雜誌 |
卷期 | 24:6 1999.12[民88.12] |
頁次 | 頁239-242 |
分類號 | 415.384 |
關鍵詞 | 電腦斷層血管攝影; 頸動脈狹窄或阻塞; Computed tomography angiography; CT angiography; Carotid arteries stenosis or obstruction; |
語文 | 中文(Chinese) |
中文摘要 | 一般評估頸動脈狹窄是用傳統的血管攝影,本研究的目的是利用螺旋式電腦斷層(SpiralCT)儀的軸面影像以及重組曲線多平面影像(CurvedMultiplana 「ReformationCMPR」,來評估頸動脈狹窄的程度和解剖上的異常。我們收集15例腦梗塞的病人,共30條頸動脈,用螺旋式電腦斷恬儀掃瞄頸部,然後在工作站(Workstation)用曲線多平面重組法、陰影表面額示法(ShadedSurfaceDisplay,SSD)、最大強度投影(MaximumIntensityProjec-tion,MIP組成頸動脈電腦斷層血管影像(CTAngiography,CTA);另外這15個病人也都接受借統的血管攝影(ConventionalAngiography)'品少包括兩個角度;這些影像由兩位不知道檢查結果的放射專科臀師來判計頸動脈狹窄的程度;狹窄程度是根據 NASCET(NorthAmerican SymptomaticCarotidEndan@erectomyTrial)的分類,分別為輕度狹窄 (0-29)、中度狹窄 (30-69)、嚴重狹窄(70-99)以及完全阻塞 (100)。比較CT軸面像以及CMPRCT重組法和血管扭影的頸動脈測三結果其相關性很好,軸面像對頸動脈血管狹窄介類正確率為83,而CMPR對狹窄程度分類正確率為90。此研究顯示,軸面像及CMPR影像可以對評估頸動脈血管狹窄提供一可靠方法且較SSD和MIP法較為節省時間,鈣化的偵測是SSD和MIP影像的最大受限因素,軸面像及CMPR影像都能保持CT原來的密度。 |
英文摘要 | To determine and compare the reliability of the diagnosis of carotid arterystenosis by Computed Tomography (CT) axial images and curved multiplanarreformation (CMPR) CT angiography (CTA). Spiral CT and conventional angiography were performed in 15 patients (30carotid arteries). Stenosis measurement was performed in a blinded fashion onthe angiography and CT by two independent radiologists. CMPR, SSD (shadedsurface display) and MIP (maximal intensity projection) were systemicallyperformed for each carotid bifurcation. We measured stenosis using conventionalangiography as a standard and the category of stenosis was determined accordingto the NASCET (North American Symptomatic Carotid Endarterectomy Trial):mild (0 to 29), moderate (30 to 69), severe (70 to 99), and occlusion(100). The correlation of carotid measurements between conventional angiographyand the axial CT images and CMPR CT reconstruction methods was very good.Axial sections correctly classified the carotid stenosis in 83 of the cases andCMPR correctly classified the degree of stenosis in 90. Our study showed that axial images and CMPR provide a reliable method forevaluating carotid stenosis and that they are more timesaving than SSD and MIP.Detection of calcifications was the limiting factors in SSD and MIP. Axialimages and CMPR can also preserve the CT density. |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。