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

Postoperative Sella: Evaluation with Fast Spin Echo T2-weighted High-resolution Imaging AbstractOBJECTIVE:The purpose of this study was to investigate the magnetic resonance features of the postoperative sella -L 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.METHODS:Coronal spin echo (SE) Tt-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.RESULTS:The pituitary gland was delineated in 51 of 59 FSE T2-weighted images, 9 0 .2% of which presented clear boundaries. Whereas the gland was detected in 49 of 58 SE T1-weighted images, only 2 0 .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.CONCLUSION: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. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Neurosurgery Oxford University Press

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

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

C L IN IC A L ST U D IE S « f t Postoperative Sella: Evaluation with Fast Spin Echo T2-weighted High-resolution Imaging fo Yoko Nakasu, M.D., Ryuta Itoh, M.D., ler Satoshi Nakasu, M.D., Hirofumi Nioka, M.D., v Minoru Kidooka, M.D., Jyoji Handa, M.D. jj Departments o f Neurosurgery (YN, SN, H N , JH), and Radiology (Rl), Shiga U n ive rsity o f M e d ica l Science, Ohtsu, Shiga, and D ep artm ent o f Neurosurgery (MK), f D ai-ni O k a m o to Hospital, U ji, Kyoto, Japan T O B JE C T IV E : The purpose of this study was to investigate the magnetic resonance features of the postoperative sella -L 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. fja M E T H O D S : Coronal spin echo (SE) Tt-w eighted and FSE T2-weighted images were prospectively obtained in 24 5> patients after surgery for pituitary adenomas. We observed the signals and the contour of normal structures, fluid t: collection, implanted materials, and mass lesions, including granulation tissue and adenoma. at | RESULTS: The pituitary gland was delineated in 51 of 59 FSE T2-weighted images, 9 0 . 2 % of which presented clear boundaries. Whereas the gland was detected in 4 9 of 5 8 SE T1-weighted images, only 2 0 . 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 fit 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 =r images and 0 . 2 5 for SE T1-weighted images. C O N C L U S IO N : FSE T2-weighted imaging is a reliable method with which to assess the sella with sufficient resolution ^ after...
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Publisher
Oxford University Press
Copyright
© Published by Oxford University Press.
ISSN
0148-396X
eISSN
1524-4040
D.O.I.
10.1097/00006123-199809000-00025
Publisher site
See Article on Publisher Site

Abstract

AbstractOBJECTIVE:The purpose of this study was to investigate the magnetic resonance features of the postoperative sella -L 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.METHODS:Coronal spin echo (SE) Tt-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.RESULTS:The pituitary gland was delineated in 51 of 59 FSE T2-weighted images, 9 0 .2% of which presented clear boundaries. Whereas the gland was detected in 49 of 58 SE T1-weighted images, only 2 0 .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.CONCLUSION: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.

Journal

NeurosurgeryOxford University Press

Published: Sep 1, 1998

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