Magnetic resonance imaging in patients with cardiac implantable electronic devices: A prospective study

Navarro-Valverde, Cristina; Ramos-Maqueda, Javier; Romero-Reyes, María José; Esteve-Ruiz, Irene; García-Medina, Dolores; Pavón-Jiménez, Ricardo; Rodríguez-Gómez, Cristóbal; Leal-del-Ojo, Juan; Cayuela, Aurelio; Molano-Casimiro, Francisco Javier

doi:10.1016/j.mri.2022.05.004

Cited by 9 publications

(3 citation statements)

References 31 publications

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“…3.2 μT as previously suggested in the FPO:B) might used for untested implants under the assumption that its safe (e.g. cardiac pacemakers as suggested in current literature (Sohns and Sommer 2021, Nazarian et al 2017, Navarro-Valverde et al 2022). From table 4, it is easy to see that applying a fixed + B 1 strategy will lead to a more conservative exposure compared to normal operating mode (e.g.…”

Section: Discussionmentioning

confidence: 90%

Impact of MRI RF coil design on the RF-induced heating of medical implants: fixed B ₁ ⁺ _rms exposure versus normal operating mode

Yao,

Li,

2024

Phys. Med. Biol.

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A direct comparison of the impact of RF coil design under SAR and B1+ rms limitations are investigated and quantified using RF coils of different geometries and topologies at 64 MHz and 128 MHz. The RF-induced in vivo electric field and power deposition of a 50 cm long pacemaker and 55 cm long deep brain stimulator (DBS) are evaluated within two anatomical models exposed with these RF coils. The associated uncertainty is quantified and analyzed under a fixed B1+ rms incident and normal operating mode. For a fixed B1+ rms incident, the in vivo incident field shows a much higher uncertainty (>5.6 dB) to the RF coil diameter compared to other design parameters (e.g., <2.2 dB for coil length and topology), while the associated uncertainty reduced greatly (e.g., <1.5 dB) under normal operating mode exposure. Similar uncertainties are observed in the power deposition near the pacemaker and DBS electrode. Compared to the normal operating mode, applying a fixed B1+ rms field to the untested implant will lead to a large variation in the induced incident and power deposition of the implant, as a result, a larger safe margin when different coil designs (e.g., coil diameter) are considered.

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Section: Discussionmentioning

confidence: 90%

Impact of MRI RF coil design on the RF-induced heating of medical implants: fixed B ₁ ⁺ _rms exposure versus normal operating mode

Yao,

Li,

2024

Phys. Med. Biol.

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“…In such a case, disturbances due to EMF noise mainly concern universal non-ionizing procedures using MRI. The second category concerns body onboard embedded and wearable devices [14][15][16][17][18].…”

Section: Introductionmentioning

confidence: 99%

“…The wearable biosensors involved behave as non-intrusive tools allowing real-time monitoring of patients, providing sufficient data to establish their health status and can constitute a first diagnosis. Devices integrated into the body can be static passive for permanent monitoring, e.g., [17], or active stimulating or assisting tools, e.g., [18]. All of these onboard tools enable diligent, personalized and tailored healthcare.…”

Section: Introductionmentioning

confidence: 99%

Assessment of a Functional Electromagnetic Compatibility Analysis of Near-Body Medical Devices Subject to Electromagnetic Field Perturbation

Razek

2023

Electronics

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This article aims to assess, discuss and analyze the disturbances caused by electromagnetic field (EMF) noise of medical devices used near living tissues, as well as the corresponding functional control via the electromagnetic compatibility (EMC) of these devices. These are minimally invasive and non-ionizing devices allowing various healthcare actions involving monitoring, assistance, diagnoses and image-guided medical interventions. Following an introduction of the main items of the paper, the different imaging methodologies are conferred, accounting for their nature, functioning, employment condition and patient comfort and safety. Then the magnetic resonance imaging (MRI) components and their fields, the consequential MRI-compatibility concept and possible image artifacts are detailed and analyzed. Next, the MRI-assisted robotic treatments, the possible robotic external matter introductions in the MRI scaffold, the features of MRI-compatible materials and the conformity control of such compatibility are analyzed and conferred. Afterward, the embedded, wearable and detachable medical devices, their EMF perturbation control and their necessary protection via shielding technologies are presented and analyzed. Then, the EMC control procedure, the EMF governing equations and the body numerical virtual models are conferred and reviewed. A qualitative methodology, case study and simple example illustrating the mentioned methodology are presented. The last section of the paper discusses potential details and expansions of the different notions conferred in the paper, in the perspective of monitoring the disturbances due to EMF noise of medical devices working near living tissues. This contribution highlights the possibility of the proper functioning of medical instruments working close to the patient’s body tissues and their protection by monitoring possible disturbances. Thanks to these commitments, various health recommendations have been taken into account. This concerns piezoelectric actuated robotics, assisted with MRI and the possible use of conductive materials in this imager under certain conditions. The safe use of onboard devices with EMF-insensitive or intelligently shielded materials with short exposure intervals is also of concern. Additionally, the need to monitor body temperature in case of prolonged exposure of onboard devices to EMF is analyzed in the Discussion section. Moreover, the use of virtual tissue models in EMC testing to achieve more realistic evaluation capabilities also features in the Discussion section.

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Exercise MR of Skeletal Muscles, the Heart, and the Brain

Hooijmans,

Jeneson,

Jørstad

et al. 2024

Magnetic Resonance Imaging

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Magnetic resonance (MR) imaging (MRI) is routinely used to evaluate organ morphology and pathology in the human body at rest or in combination with pharmacological stress as an exercise surrogate. With MR during actual physical exercise, we can assess functional characteristics of tissues and organs under real‐life stress conditions. This is particularly relevant in patients with limited exercise capacity or exercise intolerance, and where complaints typically present only during physical activity, such as in neuromuscular disorders, inherited metabolic diseases, and heart failure. This review describes practical and physiological aspects of exercise MR of skeletal muscles, the heart, and the brain. The acute effects of physical exercise on these organs are addressed in the light of various dynamic quantitative MR readouts, including phosphorus‐31 MR spectroscopy (31P‐MRS) of tissue energy metabolism, phase‐contrast MRI of blood flow and muscle contraction, real‐time cine MRI of cardiac performance, and arterial spin labeling MRI of muscle and brain perfusion. Exercise MR will help advancing our understanding of underlying mechanisms that contribute to exercise intolerance, which often proceed structural and anatomical changes in disease. Its potential to detect disease‐driven alterations in organ function, perfusion, and metabolism under physiological stress renders exercise MR stress testing a powerful noninvasive imaging modality to aid in disease diagnosis and risk stratification. Although not yet integrated in most clinical workflows, and while some applications still require thorough validation, exercise MR has established itself as a comprehensive and versatile modality for characterizing physiology in health and disease in a noninvasive and quantitative way.Evidence Level5Technical EfficacyStage 1

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Magnetic resonance imaging in patients with cardiac implantable electronic devices: A prospective study

Cited by 9 publications

References 31 publications

Impact of MRI RF coil design on the RF-induced heating of medical implants: fixed B ₁ ⁺ _rms exposure versus normal operating mode

Impact of MRI RF coil design on the RF-induced heating of medical implants: fixed B ₁ ⁺ _rms exposure versus normal operating mode

Assessment of a Functional Electromagnetic Compatibility Analysis of Near-Body Medical Devices Subject to Electromagnetic Field Perturbation

Exercise MR of Skeletal Muscles, the Heart, and the Brain

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Magnetic resonance imaging in patients with cardiac implantable electronic devices: A prospective study

Cited by 9 publications

References 31 publications

Impact of MRI RF coil design on the RF-induced heating of medical implants: fixed B 1 + rms exposure versus normal operating mode

Impact of MRI RF coil design on the RF-induced heating of medical implants: fixed B 1 + rms exposure versus normal operating mode

Assessment of a Functional Electromagnetic Compatibility Analysis of Near-Body Medical Devices Subject to Electromagnetic Field Perturbation

Exercise MR of Skeletal Muscles, the Heart, and the Brain

Contact Info

Product

Resources

About

Impact of MRI RF coil design on the RF-induced heating of medical implants: fixed B ₁ ⁺ _rms exposure versus normal operating mode

Impact of MRI RF coil design on the RF-induced heating of medical implants: fixed B ₁ ⁺ _rms exposure versus normal operating mode