Approaches in cooling of resistive coil-based low-field Magnetic Resonance Imaging (MRI) systems for application in low resource settings.
Approaches in cooling of resistive coil-based low-field Magnetic Resonance Imaging (MRI) systems for application in low resource settings.
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DOI：
10.1186/s42490-021-00048-6
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发表时间：
2021-02-12
影响因子：
--
通讯作者：
Obungoloch J
中科院分区：
文献类型：
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作者：
Natukunda F;Twongyirwe TM;Schiff SJ;Obungoloch J
磁共振成像（MRI）是一种用于诊断各种健康状况的非侵入性方法，与其他成像方式（如超声和计算机断层扫描）相比，它越来越受欢迎。最初，概念验证和早期的MRI系统基于电阻和永磁技术。然而，超导磁体凭借其高场（HF）强度能力长期垄断MRI系统的市场，尽管它们存在高的构造、安装和选址要求。这些严格的先决条件限制了低中收入国家的供应和使用。基于电阻线圈的磁体，尽管容量为低场（LF），但代表了在资源受限环境中MRI系统可用性和使用的合理提升。这些系统的特点是低成本加上实质性的图像质量，用于诊断一些条件，如脑积水常见的是这样的区域。然而，电阻线圈的性质导致它们在操作期间变热，因此需要专用的冷却系统来提高图像质量并延长系统寿命。本文探讨了一系列的冷却方法，已被应用到电阻磁铁，列举其优点和缺点和改进的领域。
Magnetic Resonance Imaging (MRI), a non-invasive method for the diagnosis of diverse health conditions has experienced growing popularity over other imaging modalities like ultrasound and Computer Tomography. Initially, proof-of-concept and earlier MRI systems were based on resistive and permanent magnet technology. However, superconducting magnets have long held monopoly of the market for MRI systems with their high-field (HF) strength capability, although they present high construction, installation, and siting requirements. Such stringent prerequisites restrict their availability and use in low-middle income countries. Resistive coil-based magnet, albeit low-field (LF) in capacity, represent a plausible boost for the availability and use of MRI systems in resource constrained settings. These systems are characterized by low costs coupled with substantial image quality for diagnosis of some conditions such as hydrocephalus common is such regions. However, the nature of resistive coils causes them to heat up during operation, thus necessitating a dedicated cooling system to improve image quality and enhance system longevity. This paper explores a range of cooling methods as have been applied to resistive magnets, citing their pros and cons and areas for improvement.