A5048782725- Advanced MRI Techniques and Applications
- Electron Spin Resonance Studies
- Wireless Power Transfer Systems
- Ultrasound and Hyperthermia Applications
- Electromagnetic Fields and Biological Effects
- Wireless Body Area Networks
- RFID technology advancements
- Electromagnetic Compatibility and Measurements
- Recycling and Waste Management Techniques
- Atomic and Subatomic Physics Research
- Electromagnetic Launch and Propulsion Technology
- Superconducting Materials and Applications
- Neural and Behavioral Psychology Studies
- Transcranial Magnetic Stimulation Studies
- Functional Brain Connectivity Studies
- EEG and Brain-Computer Interfaces
- Neuroscience and Neural Engineering
- Ultrasound Imaging and Elastography
Sapienza University of Rome
2015-2021
Center for Devices and Radiological Health
2017-2018
United States Food and Drug Administration
2017-2018
Office of Science
2015-2018
This study aims at a systematic assessment of five computational models birdcage coil for magnetic resonance imaging (MRI) with respect to accuracy and cost.The were implemented using the same geometrical model numerical algorithm, but different driving methods (i.e., "defeaturing"). The defeatured labeled as: specific (S2), generic (G32, G16), hybrid (H16, [Formula: see text]). was evaluated "symmetric mean absolute percentage error" ("SMAPE"), by comparison measurements in terms frequency...
Purpose: The purpose of this study was to investigate the need for high-resolution detailed anatomical modeling correctly estimate radio-frequency (RF) safety during magnetic resonance imaging (MRI). RF-induced heating near metallic implanted devices depends on electric field tangential device (Etan ). Etan and specific absorption rate (SAR) were analyzed in blood vessels an model understand if a standard gel phantom accurately represents potential tissues due passive vascular implants such...
The purpose of this study is to perform provocative testing for the assessment electromagnetic interference (EMI) radiofrequency identification (RFID) and near field communication (NFC) readers on implantable pacemakers (PMs). Ten PMs were exposed generated by an RFID/NFC reader emulator, in LF (125 kHz), HF NCF (13.56 MHz), UHF (900 MHz) bands. Provocative tests performed increasing strength beyond maximum levels allowed commercial devices. affected EMI all three frequency For RFID, 2/10...
Purpose This study aims to investigate how the positions of feeding sources transmit radiofrequency (RF) coil, field orientation direction with respect patient, and patient dimensions affect global local electromagnetic exposure in human body models. Methods Three RF coil models were implemented, namely a specific two‐source (S2) feed two multisource configurations: generic 32‐source (G32) hybrid 16‐source (H16). Thirty‐two conditions studied for S2, whereas G32 H16. The was performed using...
High dielectric materials (HDM) have been proposed in magnetic resonance imaging (MRI) to increase the signal-to-noise ratio (SNR) of images acquired while reducing radiofrequency (RF) absorption tissue. The aim this study is assess potential merit using HDM reduce power induced at tip an endocardial lead patients undergoing MRI. Numerical simulations were performed a commercial finite-differences time-domain (FDTD) software model RF field generated by birdcage body coil 64 MHz on human...
This study investigates how the tuning conditions of a 64 MHz / 1.5 T radio frequency (RF) birdcage coil modeled with an RF circuit and 3D electromagnetic co-simulation affect electric magnetic near-field distribution. Four models were implemented different difference between numerical results measurements was evaluated. The show that simulated depends significantly on conditions, especially in volumes close to ASTM phantom walls. Further extensive evaluations should be conducted cover...
An accurate dosimetry is a key issue to understanding brain stimulation and related interaction mechanisms with neuronal tissues at the basis of increasing amount literature revealing effects on human induced by low-level, low frequency pulsed magnetic fields (PMFs).
Magnetic Resonance Imaging (MRI) is a radiological imaging technique widely used in clinical practice. MRI has been proposed to guide the catheters for interventional procedures, such as cardiac ablation. However, there are risks associated with this procedure, RF-induced heating of tissue near catheters. The aim study develop quantitative RF-safety method patients partially implanted leads at 64 MHz. related electric field incident along catheter, which turns depends on several variables,...