K空间中心部分采集技术的垂体动态增强扫描  

Scanning normal pituitary gland and pituitary microadenoma by measuring central K space

作　　者：梁长虹[1] 陈乃楹[1] 黄美萍[1] 郑君慧[1] 谭绍恒[1] 黄飚[1] 

机构地区：[1]广东省人民医院放射科MR室

出　　处：《中华放射学杂志》1997年第3期152-155,共4页Chinese Journal of Radiology

摘　　要：目的：研究ｋｅｙｈｏｌｅ技术的临床应用，探讨正常垂体增强时间及增强方式；对比动态与非动态扫描垂体微腺瘤的显示情况。材料与方法：随机选择３０例女性无垂体病变及症状者作为对照组；垂体微腺瘤组３０例。ｋｅｙｈｏｌｅ动态增强扫描方法为０．１ｍｍｏｌ／ｋｇ钆喷酸葡胺静脉注射后第１０秒钟开始动态扫描垂体。结果：正常垂体组显示垂体在开始注射造影剂后２７秒开始从垂体柄向腺垂体逐步强化，７５秒时达到最高持续水平，呈均匀高信号。动态增强扫描显示垂体微腺瘤２８例，常规增强扫描显示１９例。增强前、后呈相对低信号。常规增强扫描阴性病例，动态增强扫描显示病灶逐渐强化，延迟后期呈等信号。结论：动态ｋｅｙｈｏｌｅ技术能显示正常垂体增强时间及方式，能更敏感地发现垂体微腺瘤。Purpose: To investigate the clinical application of central K space (key hole) imaging in the study of normal pituitary gland and pituitary microadenoma. Materials and methods: We prospectively studied pituitary microadenoma and normal pituitary gland in 30 female patients. Coronal and sagittal plane T 1 weighted images were scanned, key hole imaging was performed, and then saggital and coronal planes T 1 weighted images were acquired after 0.1 mmol/kg of Gd DTPA was administrated. Results: We found that normal pituitary glands were enhanced from pituitary stalk to pituitary gland at 27 seconds and reached the peak at 75 seconds after Gd DTPA was administrated. Pituitary microadenoma presented as hypointense areas on dynamic scan in 28 cases and on conventional enhancement scan in 19 cases. Conclusion: We believed that key hole imaging could show the pattern and time of enhancement of the normal pituitary gland, being able to demonstrate more microadenoma than conventional enhancement study.

关 键 词：垂体肿瘤 NMR 成像 

分 类 号：R736.404[医药卫生—肿瘤]