| 叶伟,邓东,龙莉玲,黄仲奎,梁秀咸,黄践,梁登成,陆力坚.常规SE 序列和高分辨MRI 动态增强诊断胸膜局灶性病变的比较[J].中国医学影像技术,2006,22(2):299~302 |
| 常规SE 序列和高分辨MRI 动态增强诊断胸膜局灶性病变的比较 |
| Topical focus in pleura : comparison of conventional SE sequenceand breath-hold dynamic contrast-enhanced HR-MR images |
| 投稿时间：2005-08-03 修订日期：2005-11-20 |
| DOI： |
| 中文关键词: 胸膜疾病 图像增强 磁共振成像 |
| 英文关键词:Pleura diseases Image enhancement Magnetic resonance imaging |
| 基金项目:本研究为广西科学基金资助项目(0342036)。 |
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| 中文摘要: |
| 目的 比较常规SE 序列与高分辨MR( HR2MR) 动态增强扫描显示胸膜局灶性病变的价值。方法 对30 例胸膜局灶性病变做了常规SE 平扫和HR2MR T1WI 动态增强扫描;进行了图像对比噪声比(CNR) 值的测量,分析比较常规SE 序列和动态增强的图像质量、病灶检出情况和病灶与周围胸壁深层结构的显示情况。结果 30 例胸膜局灶性病变总的CNR 值在动态增强早期、增强后期和延迟期均高于T2WI ( P 均< 0. 05 或< 0. 01) ,但具体到不同病种,则不同扫描序列CNR 值各不相同。含胶原纤维成分的良性肿瘤T2WI 的CNR 值均高于动态增强( P 均< 0. 01) ;胸膜恶性肿瘤动态增强的CNR 值则均高于T2WI( P < 0. 05 或< 0. 01) ;炎性病变动态增强的CNR 值亦高于T2WI( P < 0. 05 或< 0. 01) 。MR 动态增强的清晰度、图像质量等评分均高于T2WI( P 均< 0. 01) ;而T2WI 的伪影最多,多于动态增强( P < 0. 01) 。HR2MRI T1WI动态增强扫描可检出所有胸膜局灶性病灶且有助于明确病灶的内部结构及其血流灌注情况,且在显示肿瘤浸润胸壁的深层结构的准确性较常规SE 序列要高。结论 动态增强HR2MRI 扫描可提高胸膜恶性病变和炎症病变的对比噪声比值,能改善图像质量,有助于明确病灶的浸润范围,对胸膜局灶性病变有一定的诊断价值。 |
| 英文摘要: |
| Objective To compare the non-enhanced conventional SE images with breath-hold dynamic cont rast-enhancedHR-MR images in the diagnosis of topical focus in pleura. Methods Routine SE and breath-hold dynamic cont rast-enhancedHR-MR T1WI images were performed on 30 patient s with topical focus in pleura. Quality and quantity analysis were con-ducted based on cont rast to noise ratio (CNR) and image quality of various sequences. Results Total CNRs in early , lateand delayed stages of dynamic enhancement in the 30 patient s were significantly higher than those of T-WI ( P < 0. 05 or0. 01) . But in different entity , the CNR varied with particular sequence. CNR of T-WI for benign tumor was higher thanthat of dynamic enhancement ( P< 0. 01) , and the CNR of dynamic cont rast scanning in patient s with malignant tumor wasthe highest ( P < 0. 05 or 0. 01) . CNR of dynamic cont rast scanning in cases with inflammation was also much higher thanthat of T-WI ( P < 0. 05 or 0. 01) . Both image definition and quality of dynamic cont rast scanning were higher than that ofT-WI ( P < 0. 01) . More false shadows were observed with T-WI than with dynamic cont rast scanning ( P < 0. 01) . Dynamiccont rast-enhanced HR-MR images could detect all topical focus in pleura , and was helpful in defining the internal st ructure ,infilt ration extent and vascularity of topical focus in pleura. Conclusion CNR and image quality can be improved by dynamicHR-MR cont rast scanning for diagnosis of topical malignant tumor and inflammation in pleura. The ability to detect the pleu-ral lesion infilt ration on chest wall better make it a useful method in the diagnosis of local pleural disease. |
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