MRI4ALL: A Week-Long Hackathon for the Development of an Open-Source Ultra-Low-Field MRI System.

IF 3.3 2区 医学 Q1 RADIOLOGY, NUCLEAR MEDICINE & MEDICAL IMAGING
Kai Tobias Block, Chengtong Zhang, Vito Ciancia, Clarissa Cooley, Sairam Geethanath, Jason Stockmann, George Verghese, Leeor Alon
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Abstract

The goal of the MRI4ALL hackathon, which took place in October 2023, was to develop a functional low-field MRI scanner in just one week and to release all created source code and resources as open-source packages. The event was attended by 52 participants from 16 institutions who assembled the scanner on the last day of the hackathon. The scanner's magnetic B0 field with a strength of 43 mT and a target field-of-view size of 11 cm3 was created with a Halbach array made from 990 N40UH permanent magnets, held in place using 3D printed ring formers. Gradient coils were fabricated by gluing enameled copper wire onto 3D printed holders with imprinted wire patterns. A solenoid coil for RF transmission and reception was built by winding 20 turns of Litz wire around a 3D printed cylinder. A Red Pitaya FPGA prototyping board running the MaRCoS framework was used to control the scanner components, and a GPA-FHDO amplifier board was used to drive the gradients. To simplify the scanner's operation, console software with an intuitive graphical user interface was developed in Python using the PyPulseq package for sequence calculations. Furthermore, the scanner was equipped with a cooling system, as well as options for passive and active shimming. After resolving several technical issues that arose during the assembly, the scanner is now able to acquire MR images with different sequences. While not suitable for real-world clinical applications, it can be utilized for educational purposes or as a low-cost prototyping platform. Moreover, it may serve as a reference design for future MRI development projects. All source code and resources are available on the project website mri4all.org, allowing other groups to replicate the scanner. EVIDENCE LEVEL: n/a TECHNICAL EFFICACY: Stage 1.

MRI4ALL:一个为期一周的开源超低场核磁共振系统开发黑客马拉松。
MRI4ALL黑客马拉松于2023年10月举行,其目标是在一周内开发出功能性低场MRI扫描仪,并将所有创建的源代码和资源作为开源包发布。来自16个机构的52名参与者参加了这次活动,他们在黑客马拉松的最后一天组装了扫描仪。扫描仪的B0磁场强度为43 mT,目标视场尺寸为11 cm3,由990块N40UH永磁体制成的Halbach阵列创建,使用3D打印环形成形器固定。梯度线圈是通过将漆包铜线粘合到带有印迹线图案的3D打印支架上制造的。一个用于射频传输和接收的电磁线圈是通过在3D打印圆柱体上缠绕20圈的利兹线来构建的。使用运行MaRCoS框架的Red Pitaya FPGA原型板来控制扫描仪组件,使用GPA-FHDO放大器板来驱动梯度。为了简化扫描仪的操作,使用Python开发了具有直观图形用户界面的控制台软件,使用PyPulseq包进行序列计算。此外,扫描仪配备了冷却系统,以及被动和主动摆振选项。在解决了组装过程中出现的几个技术问题后,扫描仪现在能够获得不同序列的MR图像。虽然不适合现实世界的临床应用,但它可以用于教育目的或作为低成本的原型平台。此外,它可以作为未来MRI开发项目的参考设计。所有源代码和资源都可以在项目网站mri4all.org上获得,允许其他小组复制扫描仪。证据水平:无技术功效:第1阶段。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
CiteScore
9.70
自引率
6.80%
发文量
494
审稿时长
2 months
期刊介绍: The Journal of Magnetic Resonance Imaging (JMRI) is an international journal devoted to the timely publication of basic and clinical research, educational and review articles, and other information related to the diagnostic applications of magnetic resonance.
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