This article studies the impact of strain relief loops on RF-induced heating active implantable medical devices (AIMDs) during magnetic resonance imaging (MRI) scans at 1.5 T. Two commercially available AIMDs, a 40-cm lead length peripheral nerve stimulator (PNS) and 60-cm spinal cord (SCS), were utilized. In in vitro study, lead-tip was calculated using transfer function (TF) method compared to direct measurement results for various locations. human model analysis, along six PNS two SCS...

Electrodes partially inserted into the human body for epilepsy treatment have metallic wires. There is a safety concern during MRI due to RF-induced heating. This study evaluated heating different types of electrodes at 1.5T MRI. Based on experimental results inside ASTM phantom and in-vivo simulations, it found that highly related contact size, spacing, length lead, patient's body, clinically relevant trajectories.

This paper discusses the effects of strain relief loops on RF-induced heating Active Implantable Medical Devices (AIMDs) during an MRI procedure. A method to estimate effect loop location AIMD is developed based differentiation cumulative summation (DCS) product between transfer function and tangential component electric field along device length. Placing a at peak DCS can significantly reduce while placing nulls would lead higher temperature rise. Numerical simulations experimental...

All-optical switches play a significant role in optical communication and signal processing using purely signals offer efficient high-speed data transmission over conventional switches, which rely on optic–electronic conversions. This paper demonstrates 1×2 all-optical realized with the Mach-Zehnder Interferometer (MZI) directional couplers (DCs) for next-generation computing systems. We numerically design simulate this switch by commercially available RSoft CAD BeamPROP solver. The proposed...

In this paper, we establish the local existence and uniqueness of mild solution to Cauchy problem for convection-diffusion equation in n-dimensional Euclidean space with initial data uniformly function spaces \(L^r_{uloc,\rho}\)(\(\mathbb{R}^n\)). For proof, apply \(L^p_{uloc,\rho}\)(\(\mathbb{R}^n\)) - \(L^q_{uloc,\rho}\)(\(\mathbb{R}^n\)) estimate convolution operators got by Maekawa Terasawa [1], Banach fixed point hypothesis.

Motivation: RF-induced heating for the partially-in and partially-out (PIPO) medical implants is primary concern patient’s safety under MRI. Goal(s): Winding external portion of PIPO electrodes proposed to reduce RF 1.5T Approach: One commercial electrode an insulated solid wire were used demonstrate this concept. measured inside ASTM phantom a birdcage coil evaluated from in-vivo simulations using transfer function (TF) approach. Results: The results showed significant reduction...

Abstract Purpose To address the issue of RF‐induced heating for partially in and out (PIPO) medical devices during 1.5 T MRI scans by proposing a method minimizing external portion. Methods A tightly winding segment PIPO device is proposed to minimize overall effective reception length mitigate heating. Two commercially available simplified solid wires were used demonstrate concept. RF results are compared between typical minimized‐length trajectories under American Society Testing Materials...

RF-induced heating is evaluated for unipolar and bipolar Partially-In Partially-Out (PIPO) medical electrodes at 1.5T MRI. Numerical simulations were performed by modeling simplified to understand the RF mechanism. Then, experimental studies inside ASTM phantom using a 60 cm long commercial PIPO cardiac pacing electrodes. In addition, transfer function models developed, scaled, validated electrodes, in-vivo was estimated 30-minute exposure standard medium. The results show that electrode...

This paper investigates the radio frequency (RF)-induced heating of active implantable medical device (AIMD) with dual leads under exposure 1.5T MR system. Simulations and experiments were used in study. It was observed that coupling between closely spaced dual-leads systems has lower RF-induced compared to same system a single lead. The effect lead spacing on also studied.

Solid-state complementary metal oxide semiconductor (CMOS)-compatible glucose fuel cells, with single-walled carbon nanotube (SWCNT) films and different amounts of (wt%) were investigated. Those a SWCNT content 3 wt% found to develop the highest open circuit voltage (OCV) 400 mV, together high electrical conductivity, power density 0.53 μ W/cm 2 current 1.31 A/cm . Measurements performed by dipping anode into 30 mM solution. The OCV increased cell concentration. developed uses materials that...

The advent of all-optical switches marks a significant milestone in optical communication and signal processing. Unlike traditional that rely on optic–electronic conversions, operate purely signals, offering unparalleled speed efficiency. These leverage various phenomena, such as interference nonlinear effects, to control the light flow without needing electronic intermediary steps. This research presents novel approach switching through designing, simulating, validating polymer-based 1×2...

All-optical switches play a significant role in optical communication and signal processing using purely signals offer efficient high-speed data transmission over conventional switches, which rely on optic–electronic conversions. This paper demonstrates 1×2 all-optical realized with the Mach-Zehnder Interferometer (MZI) directional couplers (DCs) for next-generation computing systems. We numerically design simulate this switch by commercially available RSoft CAD BeamPROP solver. The proposed...

The advent of all-optical switches marks a significant milestone in optical communication and signal processing. Unlike traditional that rely on optic–electronic conversions, operate purely signals, offering unparalleled speed efficiency. These leverage various phenomena, such as interference nonlinear effects, to control the light flow without needing electronic intermediary steps. This research presents novel approach switching through designing, simulating, validating polymer-based 1×2...