Institute of Diagnostic and Interventional Radiology, University Hospital, Friedrich Schiller University, Jena, Germany.
AJNR Am J Neuroradiol. 2011 Mar;32(3):460-4. doi: 10.3174/ajnr.A2338. Epub 2011 Feb 3.
Improved MR imaging at higher field strengths enables more detailed imaging of cranial nerves. The aim of this study was to assess the identifiability of the NI in the CPA and IAC by using high-resolution 3T MR imaging.
Twenty-seven healthy volunteers (13 men and 14 women; mean age, 33 years) underwent 3T MR imaging of the CPA. The section thicknesses of the CISS sequence was 0.4 mm (TR, 12.18 ms; TE, 6.09 ms) using a 12-channel head coil. Evaluation was performed by using MPR mode. Image quality and identifiability of the NI were rated independently by 2 observers according to predefined criteria on an ordinal scale. Interobserver agreement was assessed by κ statistics.
Fifty-four NIs were evaluated. Both observers were able to identify the NI in nearly 60% of cases. It was possible to indentify at least 1 NI in 70% of all volunteers in the CPA and/or IAC. Image quality ratings showed a substantial agreement (κ = 0.65) and identifiability ratings an almost perfect (κ = 0.83) agreement.
Careful evaluation of all nervous and vascular structures in the CPA and IAC at high-resolution 3T MR imaging allows reliable depiction of the NI.
在更高场强下进行的改进型磁共振成像能够更详细地对颅神经成像。本研究旨在通过使用高分辨率 3T MR 成像评估CPA 和 IAC 中 NI 的可识别性。
27 名健康志愿者（13 名男性和 14 名女性；平均年龄，33 岁）接受了 3T MR 成像的 CPA 检查。CISS 序列的层厚为 0.4 毫米（TR，12.18 ms；TE，6.09 ms），使用 12 通道头部线圈。评估采用 MPR 模式进行。两名观察者根据预定的标准，对图像质量和 NI 的可识别性进行独立的评估，并采用κ统计量评估观察者间的一致性。
评估了 54 个 NI。两位观察者都能够识别出近 60%的 NI。在 CPA 和/或 IAC 中，所有志愿者中有 70%的人都可以识别出至少 1 个 NI。图像质量评分显示出显著的一致性（κ=0.65），可识别性评分显示出几乎完美的一致性（κ=0.83）。
在高分辨率 3T MR 成像中仔细评估 CPA 和 IAC 中的所有神经和血管结构，可以可靠地描绘 NI。
