Cranial fixation plates in cerebral magnetic resonance imaging: a 3 and 7 Tesla in vivo image quality study
Cranial fixation plates in cerebral magnetic resonance imaging: a 3 and 7 Tesla in vivo image quality study
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DOI：
10.1007/s10334-016-0548-1
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发表时间：
2016-06-01
影响因子：
2.3
通讯作者：
Wrede, Karsten H.
中科院分区：
文献类型：
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作者：
Chen, Bixia;Schoemberg, Tobias;Wrede, Karsten H.
本研究评估并量化了神经外科骨瓣固定钛颅骨固定板（CFPs）植入术后7 T磁共振成像（MRI）的损伤，研究组包括5例患者，术前和术后（72 h/3个月内）分别接受3 T和7 T MRI检查。采集的序列包括T-1加权磁化准备快速采集梯度回波（MPWE）、T-2加权快速自旋回波（TSE）成像和磁共振成像（SWI）。两名经验丰富的神经外科医生和一名神经放射科医生对图像质量和共识阅读中伪影的存在进行了评价。在两种场强下，MPPT和T-2 TSE的CFP周围均出现了轻微伪影，3 T和7 T之间无显著差异。在SWI中，由于颅内空气和出血残留物，在两种场强下的术后早期扫描中伪影加重。吸收后，直接邻近颅骨的脑组织仍可进行评估。3个月后的图像质量与3 T和7 T下的术前检查相同。CFP植入后的图像质量在7 T MRI中没有显著受损，伪影与3 T MRI中的伪影相当。
This study assesses and quantifies impairment of postoperative magnetic resonance imaging (MRI) at 7 Tesla (T) after implantation of titanium cranial fixation plates (CFPs) for neurosurgical bone flap fixation.The study group comprised five patients who were intra-individually examined with 3 and 7 T MRI preoperatively and postoperatively (within 72 h/3 months) after implantation of CFPs. Acquired sequences included T-1-weighted magnetization-prepared rapid-acquisition gradient-echo (MPRAGE), T-2-weighted turbo-spin-echo (TSE) imaging, and susceptibility-weighted imaging (SWI). Two experienced neurosurgeons and a neuroradiologist rated image quality and the presence of artifacts in consensus reading.Minor artifacts occurred around the CFPs in MPRAGE and T-2 TSE at both field strengths, with no significant differences between 3 and 7 T. In SWI, artifacts were accentuated in the early postoperative scans at both field strengths due to intracranial air and hemorrhagic remnants. After resorption, the brain tissue directly adjacent to skull bone could still be assessed. Image quality after 3 months was equal to the preoperative examinations at 3 and 7 T.Image quality after CFP implantation was not significantly impaired in 7 T MRI, and artifacts were comparable to those in 3 T MRI.