Institute of Radiology and Neuroradiology, Evangelisches Krankenhaus, Medical Campus University of Oldenburg, Germany.
Research Center Neurosensory Science, University of Oldenburg, Germany.
Rofo. 2022 Oct;194(10):1100-1108. doi: 10.1055/a-1800-8692. Epub 2022 May 11.
Recently introduced MRI techniques offer improved image quality and facilitate examinations of patients even when artefacts are expected. They pave the way for novel diagnostic imaging strategies in neuroradiology. These methods include improved 3D imaging, movement and metal artefact reduction techniques as well as Dixon techniques.
Narrative review with an educational focus based on current literature research and practical experiences of different professions involved (physicians, MRI technologists/radiographers, physics/biomedical engineering). Different hardware manufacturers are considered.
3D FLAIR is an example of a versatile 3D Turbo Spin Echo sequence with broad applicability in routine brain protocols. It facilitates detection of smaller lesions and more precise measurements for follow-up imaging. It also offers high sensitivity for extracerebral lesions. 3D techniques are increasingly adopted for imaging arterial vessel walls, cerebrospinal fluid spaces and peripheral nerves. Improved hybrid-radial acquisitions are available for movement artefact reduction in a broad application spectrum. Novel susceptibility artefact reduction techniques for targeted application supplement previously established metal artefact reduction sequences. Most of these techniques can be further adapted to achieve the desired diagnostic performances. Dixon techniques allow for homogeneous fat suppression in transition areas and calculation of different image contrasts based on a single acquisition.
· 3D FLAIR can replace 2 D FLAIR for most brain imaging applications and can be a cornerstone of more precise and more widely applicable protocols.. · Further 3D TSE sequences are increasingly replacing 2D TSE sequences for specific applications.. · Improvement of artefact reduction techniques increase the potential for effective diagnostic MRI exams despite movement or near metal implants.. · Dixon techniques facilitate homogeneous fat suppression and simultaneous acquisition of multiple contrasts..
· Sundermann B, Billebaut B, Bauer J et al. Practical Aspects of novel MRI Techniques in Neuroradiology: Part 1-3D Acquisitions, Dixon Techniques and Artefact Reduction. Fortschr Röntgenstr 2022; 194: 1100 - 1108.
最近引入的 MRI 技术提供了更高的图像质量，并使即使存在伪影的情况下也能为患者进行检查。它们为神经放射学中的新型诊断成像策略铺平了道路。这些方法包括改进的 3D 成像、运动和金属伪影减少技术以及 Dixon 技术。
基于当前文献研究和不同相关专业（医生、MRI 技术人员/放射技师、物理/生物医学工程）的实践经验，进行叙述性综述和教育性重点介绍。考虑了不同的硬件制造商。
3D FLAIR 是一种多功能 3D Turbo Spin Echo 序列的示例，在常规脑协议中有广泛的适用性。它有助于检测更小的病变并进行更精确的随访成像测量。它还对脑外病变具有高灵敏度。3D 技术越来越多地用于动脉血管壁、脑脊液空间和周围神经的成像。适用于广泛应用谱的改进的混合径向采集技术可用于减少运动伪影。针对特定应用的新型磁化率伪影减少技术补充了以前建立的金属伪影减少序列。这些技术中的大多数都可以进一步调整以达到所需的诊断性能。Dixon 技术允许在过渡区域进行均匀的脂肪抑制，并根据单次采集计算出不同的图像对比。
3D FLAIR 可用于大多数脑成像应用，取代 2D FLAIR，成为更精确、更广泛适用的协议的基石。
进一步的 3D TSE 序列越来越多地取代 2D TSE 序列，用于特定应用。
伪影减少技术的改进增加了在存在运动或靠近金属植入物的情况下进行有效诊断性 MRI 检查的潜力。
Dixon 技术便于均匀的脂肪抑制和同时采集多个对比。
