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Showing 1 to 12 of 12 for “"RF-induced heating"”.
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Effective Methods To Reduce The RF-Induced Heating For Medical Implants In MRI
Radiofrequency (RF) –induced heating is one of the primary safety concerns for patients with medical implants undergoing magnetic resonance imaging (MRI). Due to this potential hazard, patients with medical devices are usually contraindicated from the MRI process. With the steady growth in the …
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Methods and Strategies for Evaluating MRI Rf-Induced Heating for Implanted Metallic Stents
… implanted medical devices, and radio frequency (RF)-induced heating is one of the major concerns. As one of the general metallic implanted devices, however stents are not fully studied on its RF-induced heating behavior. In this work, evaluations of MRI RF-induced heating are carried out on …
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A Feasible Method to Evaluate RF-Induced Heating Behavior of Passive Orthopedic Implants in Human Body
Magnetic resonance imaging (MRI) radio frequency (RF) -induced heating is one of the most important concerns of MRI safety for patients with implantable medical devices. Due to the difficulties of performing direct study of the RF-induced heating in human body for an implantable medical device, the …
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RF-induced Heating Assessment and Heating Reduction Techniques for Partially-In and Partially-Out Medical Implants in MRI
… strong static, gradient, and radio frequency (RF) fields to produce detailed images of internal body structures. However, patients with partially-in and partially-out (PIPO) medical implants who require MRI scans are continually growing and often excluded from examinations or subjected to scans …
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Novel Methods of RF-induced Heating Assessment and Heating Reduction Techniques for Active Implantable Medical Devices in MRI
Radiofrequency (RF)-induced heating of active implantable medical devices (AIMDs) is a significant concern during magnetic resonance imaging (MRI). According to the tier-three approach proposed in ISO 10974, the device model (i.e., the transfer function [TF]) of AIMD should be developed and …
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The Tissue-reduced Virtual Family Models for RF-induced Heating Evaluation of Passive Medical Implants at 1.5 T and 3 T
RF-induced heating is an important safety concern for patients with implantable medical devices under magnetic resonance imaging (MRI) scanning. The implanted device may lead to a high temperature rise near device edges and cause tissue damage. Thus, the RF-induced heating near the device needs to …
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Comprehensive MRI Safety Assessment: Impact of Strain-Relief Loop Position, Lateral Movement, and Varying Field Strengths on RF-Induced Heating of Medical Implants
… strong magnetic fields and radiofrequency (RF) waves to produce detailed images of human organs, tissues, and various anatomical structures. Despite its benefits, individuals with active implantable medical devices (AIMDs) and passive implantable medical devices (PIMDs) are often restricted …
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MRI Safety Evaluation of Dual Leads and Fractured Leads Active Implantable Medical Devices in MRI
Magnetic resonance imaging (MRI) radiofrequency (RF)-induced heating is of great concern for patients with active implantable medical devices (AIMDs) undergo MR scanning. RF safety evaluation of AIMDs consists of two steps: (1) the development of the AIMD model (i.e., transfer function (TF) …
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MRI Safety Concerns: Anatomy Impacts on Radiofrequency Induced Heating and Implant Impacts on Gradient Induced Peripheral Nerve Stimulation
… safety concerns for patients. Radiofrequency (RF) induced heating and gradient induced peripheral nerve stimulation (PNS) are two typical safety concerns. Although many literatures have found the importance of them, they are not fully investigated. In this dissertation, the impact of anatomy on …
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Measurements of MRI Induced Heating
… the use of a relatively safe radio frequency (RF) signal, which can however be problematic for patients with implantable medical devices. The RF induced heating on twenty-four titanium rods with different diameters, coatings, and lengths, were placed, within a phantom of gelled saline, inside a …
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Development of an Absorbing Radio Frequency Shield for Safe Magnetic Resonance Imaging
… design for an absorbing radio frequency shield (ARFS) that helps to reduce the RF-induced heating effects at the tip of a deep brain stimulation (DBS) lead. We first review the transfer function method used to evaluate RF-induced temperature rise at a DBS lead tip, including both theory and …
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Measurement of Radiofrequency Induced Heating in Patients with Retained Post-Surgical Epicardial Leads During MRI
… the lead to interact with the radiofrequency (RF) field produced in the MRI scanner, causing a significant amount of heating in the patient. While there are numerous studies on transvenous leads, there is insufficient data to comment on the safety of patients with retained post-surgical …