Metamaterials Implants for Magnetic Resonance Imaging

用于磁共振成像的超材料植入物

• 批准号: 10668469
• 负责人: Joshua Paul Aronson
• 金额: $ 69.46万
• 依托单位: MASSACHUSETTS GENERAL HOSPITAL
• 依托单位国家: 美国
• 财政年份: 2022
• 资助国家: 美国
• 起止时间: 2022-07-20 至 2027-05-31
• 项目状态: 未结题
• 来源: https://reporter.nih.gov/project-details/10668469
• 关键词: Accidents; Adopted; Alzheimer' s Disease; Anatomy; Animal Testing; Arrhythmia; Biocompatible Materials; Brain; Characteristics; Choking; Chronic; Clinical; Clinical assessments; Coiled Bodies; Computational Technique; Deep Brain Stimulation; Defibrillators; Deposition; Development; Devices; Diagnosis; Dystonia; Electric Conductivity; Electric Stimulation; Electrocorticogram; Electrodes; Electroencephalography; Electromagnetics; Electrophysiology (science); Epilepsy; Family suidae; Filament; Film; Frequencies; Functional Magnetic Resonance Imaging; Gelfilm; General Hospitals; Generations; Goals; Head; Heating; Histology; Human; Image; Implant; Implanted Electrodes; Knowledge; Label; Lead; Leeches; Lifting; Literature; Location; MRI Scans; Magnetic Resonance Imaging; Malignant Neoplasms; Mass Spectrum Analysis; Massachusetts; Measurement; Measures; Medical; Medical Device; Medicine; Modeling; Morphologic artifacts; Pacemakers; Paralysed; Parkinson Disease; Pathologic; Patients; Performance; Polymers; Postoperative Period; Property; Refractory; Reporting; Research; Rest; Rodent; Safety; Scanning; Source; Spinal Cord; Stroke; Surface; System; Technology; Testing; Therapeutic; Therapeutic Effect; Thick; Thinness; Time; Tissues; Torque; Trauma; Traumatic Brain Injury; Universities; absorption; biomaterial compatibility; brain machine interface; comorbidity; deep brain stimulator; design; diagnostic tool; effectiveness evaluation; efficacy testing; efficacy validation; electric impedance; electrical potential; electrical property; experience; experimental study; flexibility; follow-up; implant material; implantable device; individual patient; innovation; manufacture; mechanical properties; medical implant; nanoparticle; nanoscale; nervous system disorder; neural; neural implant; neurophysiology; neurotransmission; new technology; novel; porcine model; prevent; radio frequency; safety assessment; severe injury; simulation; soft tissue; success; vapor; vibration; virtual human

Clinical electrical stimulation systems are increasingly common therapeutic options to treat a broad range of medical conditions, such as cardioverter-defibrillators, pacemakers, spinal cord stimulators, and deep brain stimulators. Despite their remarkable success, a significant limitation of these medical devices is their limited compatibility with magnetic resonance imaging (MRI), a standard and widely used diagnostic tool in medicine. A primary concern when performing MRI examinations in patients with electrically conductive implants is the antenna effect, which can potentially cause a large amount of energy to be absorbed in the tissue, leading to heat-related severe injury. In this application, we propose designing, developing, and testing a novel metamaterials technology to produce MRI conditional leads that could be used in implanted electrical recording and stimulation devices. The innovative nanoscale thin- film metamaterial is truly the only MRI cloaking technology that does not occupy any "brain" space compared to additional RF-choking components. We will develop a general framework for any arbitrary electrical stimulation lead implanted in the body to prevent a build-up of induced currents and reduce imaging artifacts during a 3 Tesla MRI. Furthermore, we propose novel electrocorticography (ECoG) electrodes based on biocompatible materials that will be stretchable, and conformable for optimal biocompatibility, safety, and performance. These novel electrodes will be thin and flexible and can be created in a wide range of configurations (i.e., strips, grids, and various combinations) for different applications. Notably, the electrodes will be MRI-safe and CT artifact-free, allowing for perfect registration of the electrode location to the brain anatomy. The electrodes also permit the combination of intracranial (depth and cortical) recordings with fMRI imaging, leading to a greater understanding of the neural organization in both individual patients and for neuroscientific knowledge. A complete test plan is in place that includes electromagnetic numerical simulation to support the design of both depth and ECoG Neuropace electrodes and bench-top and large animal testing for efficacy validation and biocompatibility on rodents. This project's long-term goal is to develop electrical stimulation system leads compatible with 3 Tesla MRI and other external radiofrequency sources, providing significant benefits to patients who may require implanted stimulators to treat pathological conditions such as heart arrhythmias and Parkinson's disease, epilepsy, and stroke.

临床电刺激系统是越来越常见的治疗选择 为了治疗广泛的医学病症，例如心律转复-复律器， 起搏器、脊髓刺激器和深部脑刺激器。尽管他们 尽管这些医疗设备取得了显著的成功，但是这些医疗设备的显著局限性是它们的有限性。 与磁共振成像（MRI）的兼容性，MRI是一种标准且广泛使用的 医学上的诊断工具进行MRI检查时的主要问题是 植入导电植入物的患者是天线效应， 导致大量的能量在组织中被吸收，导致与热有关的 严重受伤。在本申请中，我们提出设计，开发和测试一种新的 超材料技术生产可用于MRI条件性导线 植入的电记录和刺激装置。创新的纳米薄- 薄膜超材料是真正唯一的MRI隐身技术，不占用任何 “大脑”空间相比，额外的射频扼流圈组件。我们将开发一个 植入体内的任意电刺激引线的一般框架 防止感应电流积聚并减少3特斯拉MRI期间的成像伪影。 此外，我们提出了新的皮层电图（ECoG）电极的基础上， 生物相容性材料，将是可拉伸的，并符合最佳 生物相容性、安全性和性能。这些新型电极将是薄的， 灵活并且可以以宽范围的配置（即，条带、网格和 各种组合）用于不同的应用。值得注意的是，电极将是MRI安全的 无CT伪影，可将电极位置完美配准到大脑 解剖学电极还允许颅内（深度和皮质） 功能磁共振成像记录，从而更好地了解神经 组织在个体患者和神经科学知识。 制定了完整的测试计划，其中包括电磁数值模拟， 支持深度和ECoG Neuropace电极和台式电极的设计， 在啮齿动物上进行功效验证和生物相容性的大型动物试验。此项目的 长期目标是开发与3特斯拉兼容的电刺激系统电极导线 MRI和其他外部射频源，为患者提供显著受益 这些患者可能需要植入刺激器来治疗病理状况 心律失常和帕金森氏病癫痫和中风