目的　研究原发性颅内压增高 ( IIH)患者的影像学变化。方法　定量分析 32例 IIH患者垂体、蝶鞍形态的变化及其与视力变化的相关性。结果　 IIH患者可出现垂体变薄 ( 90 .60 % )、蝶鞍扩大 ( 56.2 2 % )。垂体形态的变化与相应的视力之间具有相关性 ,相关系数为 0 .4 16( P<0 .0 5)。经治疗后 ,2例可见垂体形态增厚。结论　垂体形态的变化可作为诊断 IIH的一个新的影像学参考指标 Objective To study the imaging changes in patients with elevated primary intracranial pressure (IIH). Methods Quantitative analysis of 32 cases of IIH patients with pituitary and sella changes and its relationship with changes in visual acuity. Results Patients with IIH showed pituitary thinning (90.60%) and sella enlargement (56.22%). There was a correlation between changes of pituitary morphology and corresponding visual acuity, the correlation coefficient was 0.416 (P <0.05). After treatment, 2 cases showed pituitary morphology thickening. Conclusion The changes of pituitary morphology may serve as a new imaging reference for diagnosis of IIH