PITUITARY MICROADENOMAS - DIAGNOSIS WITH 2-DIMENSIONAL AND 3-DIMENSIONAL MR IMAGING AT 1.5 T BEFORE AND AFTER INJECTION OF GADOLINIUM

被引:67
作者
STADNIK, T
STEVENAERT, A
BECKERS, A
LUYPAERT, R
BUISSERET, T
OSTEAUX, M
机构
[1] UNIV HOSP LIEGE,DEPT NEUROSURG,LIEGE,BELGIUM
[2] UNIV HOSP LIEGE,DEPT ENDOCRINOL,LIEGE,BELGIUM
关键词
Gadolinium; Magnetic resonance (MR); comparative studies; contrast enhancement; Pituitary; neoplasms; 145.363; Pituitory; MR studies; 145.1214;
D O I
10.1148/radiology.176.2.2164234
中图分类号
R8 [特种医学]; R445 [影像诊断学];
学科分类号
1002 ; 100207 ; 1009 ;
摘要
The usefulness of different magnetic resonance (MR) imaging sequences (coronal and sagittal spinecho [SE] and three-dimensional fast low-angle shot [3D FLASH]) in the detection of pituitary microadenomas before and after gadolinium injection was prospectively evaluated in 28 patients with surgical confirmation. When evaluated separately, the most useful sequences in the detection of these microadenomas were coronal pregadolinium T1-weighted SE, coronal pregadolinium 3D FLASH, coronal postgadolinium T1-weighted SE, and coronal postgadolinium 3D FLASH. The combination of pre- and postgadolinium T1-weighted sequences with preand postgadolinium 3D FLASH sequences produced the highest number of true-positive findings (90%) and the lowest number of false-positive findings (5%). When a 1.5-T imaging unit with a high signal-to-noise ratio allowing useful three-dimensional acquisition is used, the authors advocate a coronal T1-weighted SE sequence, followed (if necessary) by a coronal 3D FLASH sequence, both without injection of gadolinium, in the diagnosis of pituitary microadenomas. When no confident diagnosis is reached, the same sequences should be performed after the injection of gadolinium. The sagittal pre- and postgadolinium T1-weighted SE and long-TR SE sequences are useful only in specific cases.
引用
收藏
页码:419 / 428
页数:10
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