目的考察垂体瘤的CT影像形成 的病理基础。方法 对21例垂体瘤CT和MRI 成像特征进行总结并与术中所见病理结构 进行对比。结果 术前明确诊断为垂体瘤 18例；动脉粘连包裹受侵及海绵窦受侵检 出率100%，假阳性率为42.9%和50.0%。CT 及MRI影响可以分辨出坏死、出血、囊变 和变形等症状，但存在一定的漏诊率。颅 底骨质受侵检出率为100%，但具有25.0% 的假阳性率。结论 在CT和MRI影像中可以 较为准确的诊断垂体瘤尤其是对坏死、出 血、动脉粘连包裹受侵及海绵窦受侵检出 十分敏感，但存在有一定的假阳性。

Objective Pathological basis of CT imaging study of pituitary tumor formation. Methods 21 cases of pituitary tumor CT and MRI imaging features were summarized and compared with pathological structure in operation. Results The preoperative diagnosis of pituitary adenoma is 18 cases; The detection rate of artery adhesion invasion and cavernous sinus invasion is 100%, false positive rate is 42.9% and 50%. The effects of CT and MRI can distinguish necrosis, hemorrhage, cystic change and deformation and other symptoms, but there are certain misdiagnosis rate. Skull base invasion detection rate is 100%, the false positive rate is 25%. Conclusion The CT and MRI imaging in diagnosis of pituitary adenomas can be more accurate especially for necrosis, hemorrhage, arterial adhesion invasion and cavernous sinus invasion detection is sensitive, but there are some false positive.