论文部分内容阅读
目的 讨论磁共振扩散成像诊断颅内表皮样囊肿的有用性和特异性。方法 分析 15例经手术证实的颅内表皮样囊肿磁共振扩散成像的表现 ,也比较其他MRI序列 ,包括T1、T2 WI、质子密度加权像和快速水抑制反转恢复 (fastfluidattenuatedinversionrecoveryFLAIR)序列。结果 磁共振扩散成像显示所有肿瘤 (15个瘤灶 )呈明亮的高信号 ,肿瘤与周围脑组织和脑脊液形成鲜明的对比 ;对手术后小的残存肿瘤 (4个瘤灶 )和复发肿瘤 (3个瘤灶 )的检出也极其敏感。结论 磁共振扩散成像对表皮样囊肿有高度的敏感性和特异性 ,对手术前的定性诊断和手术后肿瘤的残存以及肿瘤复发的判断起着重要的作用。
Objective To discuss the usefulness and specificity of magnetic resonance diffusion imaging in the diagnosis of intracranial epidermoid cysts. Methods Fifteen surgically-proven MRI findings of intracranial epidermoid cysts were analyzed. Other MRI sequences were also compared, including T1, T2 WI, proton density-weighted images, and fastfluidattenuatedinversionrecoveryFLAIR sequences. Results Magnetic resonance diffusion imaging showed a bright high signal in all tumors (15 tumors). The tumors were in sharp contrast with the surrounding brain tissue and cerebrospinal fluid (CSF). The small residual tumor (4 tumors) and the recurrent tumor Tumor) detection is also extremely sensitive. Conclusion MR diffusion imaging is highly sensitive and specific to epidermoid cyst. It plays an important role in the qualitative diagnosis before operation and the residual tumor after operation as well as the judgment of tumor recurrence.