| 韩鸿宾,谢敬霞.MR 平面回波快速成像技术应用研究[J].中国医学影像技术,2000,16(5):410~413 |
| MR 平面回波快速成像技术应用研究 |
| The Study of the Application of MR Echo-Planar Imaging Technique |
| 投稿时间：2000-01-22 |
| DOI： |
| 中文关键词: 磁共振成像 平面回波成像 颅脑疾病 诊断 |
| 英文关键词:Magnetic resonance imaging Echo-planar imaging Brain diseases Diagnosis |
| 基金项目: |
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| 中文摘要: |
| 目的 结合不同类型EPI 成像技术的特点,研究不同对比度EPI 在颅脑疾病诊断中的临床应用价值。
方法 各类颅脑疾病患者136 例所有病例行常规的MR 扫描及EPI。结果 ①应用EPI 扩散加权像(及ADC 图) 与
EPI-T3 加权像对超急性期脑中风的诊断灵敏性与特异性均为100 % ,联合TSE-T2WI 与T1WI 的灵敏性与特异性
分别为0 %与42.85 %(χ2 |
| 英文摘要: |
| Objective According to the technical characteristics of EPI ,to study the value and the limits of different contrast EPI in the diagosis of brain diseases. OMethods Routine MRI and EPI were performed in 136 cases with brain diseases. Results ①The sensitivity and specificity for using EPI-DWI and EPI-T3
WI in the diagnosis of cerebral acute
stroke were both 100 %. While combined TSE-T2WI with T1WI ,the sensitivity and specificity were 0 % and 42.85 % respctively. Diagnostic values of the two groups for ischemic stroke are significantly different (χ2 = 14.08 , P < 0.01) . ②epidermoid was demonstrated as cysts with long T1 and logn T2 signal which could not be differentiated from arachnoid cysts.
epidermoid lesion was of isoro hyperintensity on diffusion-weighted imaging with the ADC value of 8.75 ×10-4mm2/ s.
While the arachnoid cysts and the necrosis in the center of tumor was shown as hypointensity with the ADC value of water.
③In the dynamic EPI-T3
WI perfusion imaging ,contrast pass peak time imaging (CPI) could demonstrated the ischemic
lesions as hyperintensity while rich blood supply tumors were demonstrated as hypointensity. Routine MR examinations including enhenced T1WI could not find tumors lesion in 3 cases which could be demonstrated on CPI by the difference of microcircular blood supply contrast . Conclusion EPI could provide several new functional contrast imaging including the water molecular diffusion and cerebral blood flow. Comprehensive utilization of EPI and routine MR sequence is helpful for the
improvement of the diagnosis the differentiation of brain diseases ,and has great clinical value. |
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