Postoperative Sella: Evaluation with Fast Spin Echo T2-weighted High-resolution Imaging

医学 磁共振成像 冠状面 T2加权 核医学 经蝶手术 快速自旋回波 自旋回波 放射科 垂体腺瘤 腺瘤 病理
作者
Yoko Nakasu,Ryuta Itoh,Satoshi Nakasu,Hirofumi Nioka,Minoru Kidooka,Jyoji Handa
出处
期刊:Neurosurgery [Lippincott Williams & Wilkins]
卷期号:43 (3): 440-446 被引量:12
标识
DOI:10.1097/00006123-199809000-00025
摘要

The purpose of this study was to investigate the magnetic resonance features of the postoperative sella with fast spin echo (FSE) T2-weighted high-resolution imaging and to evaluate the benefits of the sequence using a follow-up magnetic resonance imaging protocol after transsphenoidal surgery.Coronal spin echo (SE) T1-weighted and FSE T2-weighted images were prospectively obtained in 24 patients after surgery for pituitary adenomas. We observed the signals and the contour of normal structures, fluid collection, implanted materials, and mass lesions, including granulation tissue and adenoma.The pituitary gland was delineated in 51 of 59 FSE T2-weighted images, 90.2% of which presented clear boundaries. Whereas the gland was detected in 49 of 58 SE T1-weighted images, only 20.4% showed the boundaries. A mass lesion was identified in each of 12 patients with good resolution on FSE T2-weighted images. SE T1-weighted images detected mass lesions in 7 of 12 patients without distinctive boundaries. Contrast enhancement had little advantage in clarifying the boundaries between normal and abnormal structures. For the detection of mass lesions in the sella, the kappa values for interobserver agreement were 0.8 for FSE T2-weighted images and 0.25 for SE T1-weighted images.FSE T2-weighted imaging is a reliable method with which to assess the sella with sufficient resolution after transsphenoidal surgery. The combination of unenhanced SE T1-weighted and FSE T2-weighted images may reduce the use of contrast material after pituitary surgery.
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