Department of Pediatric Radiology, University Hospital, Leipzig, Germany.
Biomedical NMR, Max Planck Institute for Multidisciplinary Sciences, Gottingen, Germany.
Eur J Pediatr. 2023 Aug;182(8):3405-3417. doi: 10.1007/s00431-023-04996-0. Epub 2023 May 30.
Real-time MRI (rt-MRI) in children is a new imaging technique that combines the advantages of US - at frame rates of up to 50 images per second - with the quality and features of MRI. Although still subject of research, it has become a standard tool in the diagnostic portfolio of two pediatric radiology departments in Germany. Based on ultrashort acquisition times, any detrimental effects of macroscopic movements of the child and the physiological movements of the organs are negligible. Especially in pediatric brain imaging, rt-MRI has already proven its value. With suitable indications, rt-MRI can reduce anesthesia and sedation examinations in children below 6 years of age by 40% due to its very short examination time and its robustness to motion. There is a high level of acceptance among parents and referrers when diagnostic possibilities and limitations are communicated correctly.
Completely new diagnostic possibilities arise in the imaging of the moving lung, the beating heart, joint movements, and speaking and swallowing, as demonstrated in this video-backed review.
• MRI in moving children has been burdened with severe artifacts. • Gross motion usually has to be handled by sedation and periodic motion of the heart and lungs has to be compensated with time-consuming techniques until now.
• Real-time MRI allows image acquisition with up to 50 frames per second similar to ultrasound frame rate. • Real-time MRI proofs to be very promising for imaging children, reducing examination time and sedation rate drastically.
实时 MRI(rt-MRI)在儿童中是一种新的成像技术,它结合了 US 的优势——每秒高达 50 帧——以及 MRI 的质量和功能。尽管仍处于研究阶段,但它已成为德国两个儿科放射科诊断组合的标准工具。基于超短采集时间,儿童的宏观运动和器官的生理运动对图像质量的任何不利影响都可以忽略不计。特别是在儿科脑成像中,rt-MRI 已经证明了其价值。在适当的适应症下,由于检查时间非常短且对运动具有鲁棒性,rt-MRI 可以将 6 岁以下儿童的麻醉和镇静检查减少 40%。当正确沟通诊断的可能性和局限性时,家长和转诊医生的接受程度很高。
在移动的肺、跳动的心脏、关节运动以及说话和吞咽的成像中,出现了全新的诊断可能性,本视频回顾性研究对此进行了演示。
• 儿童运动中的 MRI 受到严重伪影的困扰。
• 通常需要通过镇静来处理大运动,而到目前为止,心脏和肺部的周期性运动必须通过耗时的技术来补偿。
• rt-MRI 允许每秒采集多达 50 帧的图像,类似于超声帧率。
• rt-MRI 有望极大地改善儿童成像,大大缩短检查时间和镇静率。