Three dimensional CT angiography in the detection of intracranial aneurysms

• Main Authors: Kuei Li Lin, 林奎利
• Other Authors: Wu Chung Shen
• Format: Others
• Language: zh-TW
• Published: 2000
• Online Access: http://ndltd.ncl.edu.tw/handle/64314814279545956443

碩士 === 中國醫藥學院 === 醫學研究所 === 88 === 英文摘要 PURPOSE: The purposes of this study are, first, to evaluate the diagnosis sensitivity and specificity of CTA in intracranial arterial aneurysm and, second, to assess the advantages and pitfalls of its role as the first-line diagnostic tool for spontaneous SAH and for the patients suspected of having intracranial aneurysm due to others symptoms. MATERIALS AND METHODS: During the period form May 1996 to June 1999, We performed CTA with MIP and SSD for 102 patients with suspicion of intracranial aneurysm. We analyzed the presence and morphology of any aneurysms. DSA or surgery acted as the control. RESULTS: 95 patients were eligible for analysis. (mean age, 56.8years; range, 23 to 86 years; 43 were male and 60 were women). 74 aneurysms were found in 66 patients. Negative findings at angiography was noted in 7 patients. Sensitivity and specificity of 3-D CTA for all patients and all aneurysm were 93.9% and 89.6%, 91.8% and 85.7%, respectively. CONCLUSION: CTA with its high sensitivity and specificity for aneurysms can compliment conventional catheter angiography for its better demonstration of the 3-D anatomy. It can provide surgical information about the shape, neck, direction of aneurysms, and adjacent vascular and bone structures. CTA can be the first-line diagnostic tool for SAH routinely. DSA can be the adjunct to CTA, if CTA can’t confirm the diagnosis. CTA with its high sensitivity and specificity for all patients may be useful in the follow-up of untreated aneurysms and “at-risk” groups due to it is less invasive and less expensive. Recognition of the limitations of CT angiography is important in minimizing interpretation errors.