【摘要】 目的 研究足月新生儿垂体腺信号强度特点及形态特征。方法 收集95例无垂体腺疾病的足月新生儿,男49例,女46例,平均年龄8.22 d。使用Philips Intera Achieva 1.5T双梯度扫描仪行颅脑检查,选择T₁WI序列矢状位垂体正中层面,测量垂体前叶、后叶及同层面桥脑橄榄核信号强度,计算垂体前叶、后叶信号强度及与桥脑橄榄核信号强度比值:同时测量垂体前叶矢状高径及前后径。结果 95例足月新生儿垂体前叶、后叶信号强度均值分别为1 506.909±411.267、2 042.330±553.466,二者之间具有统计学意义（P<0.05）,而前、后叶信号强度在不同性别之间无统计学差异（P>0.05）。95例足月新生儿垂体前叶、后叶信号强度与桥脑橄榄核信号强度比值分别为1.843±0.211、2.512±0.472,二者之间具有统计学差异（P<0.05）;二者在不同性别之间无统计学差异（P>0.05）。95例足月新生儿垂体前叶矢状高径、前后径均值分别为（4.055±0.648） mm、（2.969±0.337） mm,二者在不同性别之间亦无统计学差异（P>0.05）。结论 在MRIT₁WI序列上,足月新生儿垂体前叶、后叶信号强度均高于桥脑橄榄核信号强度,前叶表现为高信号或稍高信号;垂体前叶矢状高径大于前后径,且97.89%（93/95例）垂体前叶呈隆突型。更多还原

【Abstract】 Objective To investigate the MRI shape and signal intensity of the pituitary gland in normal full-term neonates.Methods 95 cases of the pituitary gland MRI of full-term neonates were presented,in which there were 49 cases of male and 46 cases of female,mean age 8.22 days,by using Philips Intera Achieva 1.5 T megnatic resonances system.The signal intensity of the anterior,posterior lobes of the pituitary gland and the olivary nucleus of pons were obtained,and the ratios of the signal intensity of the anterior,posterior pituitary lobes to the olivary nucleus of pons were calculated.The height and the anteroposterior diameter of the anterior pituitary lobe were measured on middline sagittal T₁WI sequence.Results The signal intensity of the anterior,posterior pituitary lobes were 1 506.909±411.267,2 042.330±553.466（P<0.05）,but there was no significant between different sex（P>0.05）.The ratios of the signal intensity of the anterior,posterior pituitary lobes to the olivary nucleus of pons were 1.843±0.211,2.512±0.472（P<0.05）,but there was no significant between different sex（P>0.05）.The sagittal height and the anteroposterior diameter of the anterior lobe were（4.005±0.648） mm,（2.969±0.337） mm,each of them also had no significant between different sex（P>0.05）.Conclusion The signal intensity of the anterior,posterior pituitary lobes is more high than the olivary nucleus of pons.The anterior pituitary lobe appeares a high or slightly high signal intensity.In each full-term neonate the height of the anterior pituitary lobe are more high than the anteroposterior diameter,and the most anterior pituitary lobes of full-term neonates（97.89%） appear convex type in shape.更多还原