Fukui M B, Weissman J L, Curtin H D, Kanal E
Department of Radiology, University of Pittsburgh Medical Center, PA 15213, USA.
AJNR Am J Neuroradiol. 1996 Aug;17(7):1211-8.
To determine whether masses of the internal auditory canal are hypointense relative to cerebrospinal fluid, and therefore visible, on fast spin-echo T2-weighted MR images.
Forty-six patients had 50 masses of the internal auditory canal, identified initially on contrast-enhanced MR images, that were evaluated retrospectively for signal intensity of the mass with respect to cerebrospinal fluid and for visibility of the neural elements within the internal auditory canal on T2-weighted images.
Forty-seven of 50 masses were clearly identified on T2-weighted images. Three small abnormalities (2 to 4 mm) were not seen with confidence on T2-weighted images. However, on close inspection of these three masses, the small abnormality on contrast-enhanced MR images corresponded to a hypointense focus on T2-weighted images. All 50 masses were hypointense relative to cerebrospinal fluid on T2-weighted images.
All masses of the internal auditory canal in this study were hypointense relative to cerebrospinal fluid on T-2 weighted images, and were therefore visible.
确定在快速自旋回波T2加权磁共振成像上，内听道肿块相对于脑脊液是否呈低信号，从而是否可见。
46例患者有50个内听道肿块，最初在增强磁共振成像上发现，回顾性评估肿块相对于脑脊液的信号强度以及T2加权图像上内听道内神经结构的可见性。
50个肿块中有47个在T2加权图像上清晰可见。3个小异常（2至4毫米）在T2加权图像上不能确定看到。然而，仔细检查这3个肿块时，增强磁共振成像上的小异常在T2加权图像上对应一个低信号灶。所有50个肿块在T2加权图像上相对于脑脊液均呈低信号。
本研究中所有内听道肿块在T2加权图像上相对于脑脊液均呈低信号，因此可见。
