Benchtop spectrometer, gaussmeter and position system for low field, open magnetic resonance

用于低场、开放式磁共振的台式光谱仪、高斯计和定位系统

• 批准号: 374968-2009
• 负责人: Marble, Andrew
• 金额: $ 4.91万
• 依托单位: Carleton University
• 依托单位国家: 加拿大
• 项目类别: Research Tools and Instruments - Category 1 (<$150,000)
• 财政年份: 2008
• 资助国家: 加拿大
• 起止时间: 2008-01-01 至 2009-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=412049
• 关键词: Benchtop; spectrometer; gaussmeter; position; system

Magnetic resonance imaging is a proven and powerful tool in medical diagnostics. Along with biomedical applications, magnetic resonance (MR), the phenomenon behind MRI, can be applied to a range of nondestructive testing problems, for example structural health monitoring in buildings, quality control of food products, and process monitoring in polymer manufacturing. Conventional MR is costly, requiring large superconducting magnets to generate the carefully controlled magnetic fields which make this technology work. MR compatible magnetic fields must traditionally be generated inside of an enclosed tube - like a hospital MRI machine - which makes it difficult or impossible to measure many samples. Low cost, open magnets would be a more affordable alternative to conventional medical MRI machines which would be of great benefit in developing countries or more remote locations such as northern Canada. Simplified quality control MR measurements would benefit industry in terms of cost savings and increased product quality. I am developing ways of designing MR magnets which overcome these difficulties, lowering cost using permanent magnets, and projecting the required magnetic field into an open volume in order to accommodate a wider range of measurement samples. This design work requires feedback including (1) mapping the magnetic field patterns of magnets constructed based on the design techniques being developed, (2) MR measurements using the constructed magnets - this provides feedback which allows designs to be numerically optimized, and opportunities to develop signal processing techniques to correct data corrupted by the less than ideal magnetic field generated by open magnets. With the ability to make these MR measurements, I will also work with research and industry partners to develop new sensing techniques for applications such as healthcare and quality control. For these applications, I am requesting a benchtop spectrometer - the apparatus providing experimental control for MR experiments, a Gaussmeter - a magnetic field sensor used to make 3D maps of magnetic fields, and a 3-axis position system for use in field mapping and MR experiment automation.

磁共振成像是医学诊断中经过验证的强大工具。沿着生物医学应用，磁共振（MR），MRI背后的现象，可以应用于一系列无损检测问题，例如建筑物的结构健康监测，食品的质量控制，以及聚合物制造的过程监测。传统的MR成本高昂，需要大型超导磁体来产生精心控制的磁场，从而使这项技术发挥作用。传统上，MR兼容磁场必须在封闭的管内产生-如医院的MRI机器-这使得难以或不可能测量许多样品。低成本、开放式磁体将是传统医疗MRI机器的更经济实惠的替代品，这将在发展中国家或更偏远的地区（如加拿大北方）带来巨大好处。简化的质量控制MR测量将在节约成本和提高产品质量方面使工业受益。我正在开发设计MR磁体的方法，以克服这些困难，使用永磁体降低成本，并将所需的磁场投射到开放体积中，以容纳更广泛的测量样品。该设计工作需要反馈，包括（1）映射基于正在开发的设计技术构建的磁体的磁场模式，（2）使用构建的磁体进行MR测量-这提供了允许设计进行数值优化的反馈，以及开发信号处理技术以校正由开放磁体产生的不太理想的磁场损坏的数据的机会。有了进行这些MR测量的能力，我还将与研究和行业合作伙伴合作，为医疗保健和质量控制等应用开发新的传感技术。对于这些应用，我需要一台台式光谱仪（为MR实验提供实验控制的设备）、一台高斯计（用于制作磁场3D图的磁场传感器）以及一个用于磁场测绘和MR实验自动化的3轴定位系统。