Grading of endolymphatic hydrops using magnetic resonance imaging
Grading of endolymphatic hydrops using magnetic resonance imaging
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DOI：
10.1080/00016480902729827
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发表时间：
2009-02-01
影响因子：
1.4
通讯作者：
Teranishi, Masaaki
中科院分区：
文献类型：
--
作者：
Nakashima, Tsutomu;Naganawa, Shinji;Teranishi, Masaaki
结论：建议用磁共振成像(MRI)对前庭和耳蜗内淋巴积水进行分级(2008名古屋分级)。目的：规范MRI对前庭和耳蜗内淋巴积水的评价。患者和方法：使用三维液体衰减(3D-FLAIR)和三维真实反转恢复(3D-REAL IR)MRI对鼓室内注射Gd后的内淋巴间隙进行评估。结果：对于前庭和耳蜗处的积水，一个简单的三阶段分级系统都是可以接受的：无、轻微和显著。在前庭，分级由内淋巴间隙与前庭液体间隙的面积之比(内淋巴间隙和外淋巴间隙之和)决定。没有积水的患者的比例为三分之一或更低，轻度积水的患者比例在三分之一到一半之间，而重度积水的患者比例超过50%。在耳蜗内，无积水的患者无Reissner膜移位；轻度积水的患者Reissner膜移位，但内淋巴间隙的面积不超过前庭阶区；重度积水者内淋巴间隙的面积超过前庭阶区。
Conclusion: Grading of endolymphatic hydrops in the vestibule and the cochlea using magnetic resonance imaging (MRI) is proposed (2008 Nagoya scale). Objective: To standardize the evaluation of endolymphatic hydrops in both the vestibule and the cochlea using MRI. Patients and methods: The endolymphatic space was evaluated after intratympanic gadolinium injection using three-dimensional fluid attenuated (3D-FLAIR) MRI and three-dimensional real inversion recovery (3D-real IR) MRI. Results: A simple three-stage grading system was acceptable for hydrops in both the vestibule and the cochlea: none, mild, and significant. In the vestibule, the grading was determined by the ratio of the area of endolymphatic space to the vestibular fluid space (sum of the endolymphatic and perilymphatic spaces). Patients with no hydrops have a ratio of one-third or less, those with mild hydrops have between one-third and a half, and those with significant hydrops have a ratio of more than 50%. In the cochlea, patients classified as having no hydrops show no displacement of Reissner's membrane; those with mild hydrops show displacement of Reissner's membrane but the area of the endolymphatic space does not exceed the area of the scala vestibuli; and in those with significant hydrops the area of the endolymphatic space exceeds the area of the scala vestibuli.