High-resolution ZTE imaging of human teeth
High-resolution ZTE imaging of human teeth
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DOI：
10.1002/nbm.2783
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发表时间：
2012-10-01
影响因子：
2.9
通讯作者：
Rasche, Volker
中科院分区：
文献类型：
--
作者：
Weiger, Markus;Pruessmann, Klaas P.;Rasche, Volker
零回波时间MRI （ZTE）是在投影梯度已经开启的情况下，通过三维径向中心外编码和硬脉冲射频激励实现的。针对短t2样本，实现了高效、鲁棒和静音的中兴通讯方法，用于高带宽高分辨率成像，需要特别快速的收发切换和代数图像重建。中兴通讯技术应用于11.7T场强下提取的人类牙齿图像，得到了非常好的矿化牙本质和牙釉质层的详细描述。将中兴通讯的结果与UTE（超短回波时间）MRI和微计算机断层扫描（mu CT）进行比较，发现信噪比和CNR产量存在显著差异。与mu CT相比，中兴MRI似乎不太容易受到牙齿填充物引起的伪影的影响，并且对早期脱矿和龋齿病变的检测具有更高的灵敏度。版权所有：John Wiley & Sons， Ltd。
MRI with zero echo time (ZTE) is achieved by 3D radial centre-out encoding and hard-pulse RF excitation while the projection gradient is already on. Targeting short-T2 samples, the efficient, robust and silent ZTE approach was implemented for high-bandwidth high-resolution imaging requiring particularly rapid transmit-receive switching and algebraic image reconstruction. The ZTE technique was applied to image extracted human teeth at 11.7T field strength, yielding detailed depictions with very good delineation of the mineralised dentine and enamel layers. ZTE results are compared with UTE (ultra-short echo time) MRI and micro-computed tomography (mu CT), revealing significant differences in SNR and CNR yields. Compared to mu CT, ZTE MRI appears to be less susceptible to artefacts caused by dental fillings and to offer superior sensitivity for the detection of early demineralisation and caries lesions. Copyright (c) 2012 John Wiley & Sons, Ltd.