Sequence-universal high-frequency prospective MRI motion correction with navigators

使用导航器进行序列通用高频前瞻性 MRI 运动校正

• 批准号: 10327727
• 负责人: Stephen Robert Frost
• 金额: $ 21万
• 依托单位: MASSACHUSETTS GENERAL HOSPITAL
• 依托单位国家: 美国
• 财政年份: 2021
• 资助国家: 美国
• 起止时间: 2021-02-01 至 2023-11-30
• 项目状态: 已结题
• 来源: https://reporter.nih.gov/project-details/10327727
• 关键词: 3-Dimensional; Accident and Emergency department; Address; Affect; Anesthesia procedures; Brain; Brain imaging; Brain scan; Child; Clinical; Computer software; Dangerousness; Data; Detection; Development; Devices; Diagnosis; Diagnostic Imaging; Disease Progression; Equipment; Face; Fatty acid glycerol esters; Financial Hardship; Frequencies; Head; Head Movements; Health; Hospital Costs; Hospitals; Image; Imaging technology; Inpatients; Lead; MRI Scans; Magnetic Resonance Imaging; Measurement; Measures; Methods; Modeling; Monitor; Morphologic artifacts; Motion; Optics; Participant; Patients; Pediatric Hospitals; Performance; Physiologic pulse; Problem Solving; Recording of previous events; Recovery; Reporting; Research; Research Institute; Resolution; Risk; Sampling; Scanning; Signal Transduction; Slice; System; Technology; Time; Training; Water; base; brain magnetic resonance imaging; clinical diagnosis; clinical examination; clinical imaging; correctional system; cost; flexibility; innovation; interest; neuroimaging; prospective; radio frequency; research clinical testing; soft tissue; subcutaneous

Project Summary/Abstract Motion during magnetic resonance imaging (MRI) is estimated to cost hospitals approximately $115,000 per scanner per year, which implies that the annual cost in the US is over $1 billion. Head movement during MRI affects clinical diagnosis, especially in the sickest patients and children. In brain imaging research, high resolution structural scans are used, and participants tend to move during these long acquisitions. Moreover, participants in patient groups may move systematically more than healthy controls, and this may introduce bias in the data with possibly erroneous conclusions from the research. In this project, we will address the problem of head motion MR neuroimaging, and validate the technology in routine clinical exams. The ideal motion tracking and correction system would require no external devices, operate at high temporal frequency to enable tracking of rapid motion, leave the contrast of the MRI sequence unchanged, and function properly in a broad array of MRI acquisition types. Unfortunately, state-of-the-art prospective motion correction requires an external device, so the impact of high-quality motion correction is limited. In this project we propose an array of innovative technical enhancements for “navigator” methods that use the intrinsic motion information in the MR signal. The developments will result in a flexible, widely applicable high-frequency prospective motion correction (PMC) that radically reduces MRI motion artifacts. In order to achieve this, we will use “cloverleaf” navigators (CLN), which have been shown to provide high- frequency motion information but unfortunately only in a limited set of “3D steady-state” sequences. To enhance the flexibility of CLN we will use the MR signal from subcutaneous fat so that motion can be measured rapidly in non-steady-state and multi-slice sequences without affecting the water signal of interest. Furthermore, CLN will be enhanced using recent advances in coil-space motion detection. During development, an external camera will be used to evaluate motion measurement and PMC performance. The PMC-enabled 3D GRE, MPRAGE, and Fast-Spin-Echo sequences will be validated in clinical brain MRI exams. Such methods for sequence-universal, high-frequency prospective motion correction without any external camera equipment could be extended to other sequences, and would substantially broaden the impact of motion-robust brain MRI and reduce the financial burden for hospitals and research institutes world-wide.

项目总结/摘要 据估计，磁共振成像（MRI）期间的运动会使医院花费约115，000美元。 这意味着美国每年的成本超过10亿美元。MRI期间头部移动 影响临床诊断，特别是在最严重的病人和儿童。在脑成像研究中， 使用分辨率结构扫描，并且参与者在这些长采集期间倾向于移动。此外，委员会认为， 患者组的参与者可能比健康对照组更系统地移动，这可能会引入偏见 在数据中可能有错误的研究结论。在这个项目中，我们将解决这个问题， 的头部运动磁共振神经成像，并验证该技术在常规临床检查。 理想的运动跟踪和校正系统将不需要外部设备， 能够跟踪快速运动的频率，保持MRI序列的对比度不变， 适当地用于广泛的MRI采集类型。不幸的是，最先进的前瞻性运动矫正 需要外部设备，因此高质量运动校正的影响有限。在这个项目中，我们建议 一系列创新的技术增强，用于使用内在运动信息的“导航器”方法 在MR信号中。这些发展将导致一个灵活的，广泛适用的高频前景 运动校正（PMC），从根本上减少MRI运动伪影。 为了实现这一目标，我们将使用“立体式”导航仪（CLN），它已被证明提供高- 频率运动信息，但不幸的是，仅在有限的一组“3D稳态”序列中。到 为了增强CLN的灵活性，我们将使用来自皮下脂肪的MR信号， 在不影响感兴趣的水信号的情况下，在非稳态和多切片序列中快速测量。 此外，CLN将使用线圈空间运动检测的最新进展来增强。 在开发过程中，将使用外部摄像机来评估运动测量和PMC性能。 PMC启用的3D GRE、MPTEE和快速自旋回波序列将在临床脑部MRI中得到确认 考试这种用于序列通用、高频前瞻性运动校正的方法没有任何额外的限制。 外部摄像设备可以扩展到其他序列，并将大大扩大影响 这将有助于实现运动稳健的脑部MRI，并减轻全球医院和研究机构的经济负担。