Casselman J W, Kuhweide R, Ampe W, D'Hont G, Offeciers E F, Faes W K, Pattyn G
Department of Radiology, A. Z. St.-Jan Brugge, Belgium.
Neuroradiology. 1996 Apr;38(3):278-86. doi: 10.1007/BF00596549.
The sensitivity of different MRI sequences in the detection of inner ear malformations in patients presenting with sensorineural hearing loss (SNHL) and/or vertigo was evaluated. We studied 650 patients presenting with SNHL and/or vertigo, clinically not suspected of having inner ear malformations. The sensitivity of T1-weighted, Gd-enhanced T1-weighted and (when available) T2-weighted spin-echo images, and three-dimensional Fourier transformation-constructive interference in steady state (3DFT-CISS) gradient-echo images, to unexpected malformations was assessed. Inner ear malformations were found in 15 (2.3%) of these patients. Enlargement of the endolymphatic duct and sac was the most frequent malformation, found in 11 patients. The 3DFT-CISS images showed all lesions; the other sequences were less sensitive and the pathology was missed, partially or only retrospectively seen in 11 of the 15 patients. Therefore, in addition to the routine unenhanced and Gd-enhanced T1-weighted and T2-weighted images, thin gradient-echo (3DFT-CISS) images are necessary to detect all clinically unexpected inner ear malformations in patients presenting with vertigo and/or SNHL.
评估了不同MRI序列对感音神经性听力损失（SNHL）和/或眩晕患者内耳畸形的检测敏感性。我们研究了650例表现为SNHL和/或眩晕的患者，临床未怀疑有内耳畸形。评估了T1加权、钆增强T1加权以及（如有）T2加权自旋回波图像和三维傅里叶变换稳态构成干扰（3DFT-CISS）梯度回波图像对意外畸形的敏感性。在这些患者中有15例（2.3%）发现内耳畸形。内淋巴管和内淋巴囊扩大是最常见的畸形，在11例患者中发现。3DFT-CISS图像显示了所有病变；其他序列敏感性较低，15例患者中有11例部分或仅在回顾时才发现病变。因此，除了常规的非增强和钆增强T1加权及T2加权图像外，薄梯度回波（3DFT-CISS）图像对于检测眩晕和/或SNHL患者中所有临床上意外的内耳畸形是必要的。
