动态增强磁共振成像在诊断垂体微腺瘤中的作用

The Role of Dynamic-enhanced MRI in the Diagnosis of Pituitary Microadenoma

目的研究对比剂动态增强磁共振成像(MRI)对垂体微腺瘤的诊断作用。方法临床拟诊的垂体微腺瘤50例行快速自旋回波对比剂动态增强扫描,接着行常规增强扫描,分析比较动态增强和常规增强两种方法对垂体微腺瘤的检出率。结果常规增强组垂体微腺瘤的检出率为72%;动态增强组垂体微腺瘤的检出率为94%。结论动态增强扫描能明显提高垂体微腺瘤的检出率。

Objective To determine whether dynamic-enhanced MR imaging is superior to standard MR imaging after contrast administration for detecting pituitary microadenoma. Methods 50 cases of clinically suspected microadenoma were examined with dynamic-enhanced MR imaging, and standard imaging with unenhanced and contrast-enhanced spin-echo sequences were obtained. The threesequences were evaluated retrospectively and graded for gland-lesion contrast conspicuity, lesion, homogeneity, and delineation of lesion margin. Results The positive rate of microadenoma was 94% for dynamic-enhanced MRI group and 72% for routinely contrast-enhanced group. Conclusion Dynamic-enhanced MR1 is the best method for the diagnosis of pituitary microadenoma.