Deepho Chutamas, Watanabe Hiroshi, Sakamoto Junichiro, Kurabayashi Tohru
1 Department of Oral and Maxillofacial Radiology, Graduate School, Tokyo Medical and Dental University, Tokyo, Japan.
Dentomaxillofac Radiol. 2018 Jan;47(1):20170245. doi: 10.1259/dmfr.20170245. Epub 2017 Oct 20.
To evaluate the validity of plain volumetric interpolated breath-hold examinations (VIBEs) for detecting the course of the mandibular canal, and to compare the results with contrast-enhanced (CE) VIBE images.
From our imaging archives, we collected 28 cases taken with a VIBE sequence both before and after intravenous administration of gadolinium hydrate, and then two observers evaluated neurovascular bundle (NVB) visibility in the VIBE images. For the invisible NVB cases, we identified the invisible areas and analysed the causes of invisibility. For cases that also had corresponding CT thin slice images, we obtained a fusion image between MRI and CT, and investigated the relationship between the NVB in VIBE and the mandibular canal in CT images.
The visibility of the NVBs in plain VIBE was 89%, the same as on CE VIBE. There were three invisible cases in each plain and CE VIBE images. The invisible areas were premolar in three cases, and molar in one case, and the causes of the invisibility were a metallic artefact in one case and motion artefacts in the other two cases.
A plain VIBE can depict the NVB at the same rate as CE VIBE, and is suitable for detecting NVBs.
评估容积内插屏气检查（VIBE）在检测下颌管走行方面的有效性，并将结果与增强对比（CE）VIBE图像进行比较。
从我们的影像存档中，收集了28例在静脉注射水合钆前后均采用VIBE序列拍摄的病例，然后由两名观察者评估VIBE图像中神经血管束（NVB）的显示情况。对于NVB显示不清的病例，我们确定了显示不清的区域并分析了显示不清的原因。对于同时有相应CT薄层图像的病例，我们获得了MRI与CT之间的融合图像，并研究了VIBE中的NVB与CT图像中的下颌管之间的关系。
平扫VIBE中NVB的显示率为89%，与CE VIBE相同。平扫和CE VIBE图像各有3例显示不清。显示不清的区域3例为前磨牙区，1例为磨牙区，显示不清的原因1例为金属伪影，另2例为运动伪影。
平扫VIBE对NVB的显示率与CE VIBE相同，适用于检测NVB。
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