Radio Frequency Propagation Close to the Human Ear and Accurate Ear Canal Models

Chen, Louis; Eaton, Gerry; Makarov, Sergey N.; Noetscher, Gregory M.

doi:10.1007/978-3-030-21293-3_19

Cited by 2 publications

(4 citation statements)

References 5 publications

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“…Some recent uses of the VHP Female v3.0-5.0 computational human model have been documented in the literature -cf. for example [14][15][16][17][18][19][20][21][22][23][24][25][26][27][28][29][30][31] -and compared with experimental data on radio frequency propagation. A number of studies have focused on the characteristics and behaviors of antennas near the human body [15][16][17][18][19][20][21][22][23].…”

Section: Vhp Female V 50 Anatomical Human Model (Doi 1020298/vhp-fema...mentioning

confidence: 99%

“…for example [14][15][16][17][18][19][20][21][22][23][24][25][26][27][28][29][30][31] -and compared with experimental data on radio frequency propagation. A number of studies have focused on the characteristics and behaviors of antennas near the human body [15][16][17][18][19][20][21][22][23]. Others have examined through simulation various biomedical applications including transmission channel modeling [24], transcranial direct current stimulation [25], estimation of bone density [26], gastroenterology [27,28], SAR simulations in MRI coils at 3 T [29], and safety of active implants under MRI procedures [30,31].…”

Section: Vhp Female V 50 Anatomical Human Model (Doi 1020298/vhp-fema...mentioning

confidence: 99%

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Computational Tool Comprising Visible Human Project® Based Anatomical Female CAD Model and Ansys HFSS/Mechanical® FEM Software for Temperature Rise Prediction Near an Orthopedic Femoral Nail Implant During a 1.5 T MRI Scan

Noetscher

Serano

Nazarian

et al. 2022

Brain and Human Body Modelling 2021

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This medical device development tool (MDDT) is categorized as a non-clinical assessment model (NAM). This MDDT is a computational modeling and simulation tool. It can predict heating of metallic orthopedic implants with the radio frequency (RF) electromagnetic fields in the magnetic resonance imaging (MRI) coils while targeting a mid-aged and elderly female population primarily affected by osteoporosis and the associated bone fracture.This MDDT uses a high resolution anatomical female CAD (computer aided design) model coupled with the proven multiphysics finite element method (FEM) software (Ansys Workbench) to simulate the complete MRI environment. The environment is consisting of a tuned MRI coil with the given output power, detailed heterogeneous human model within the coil at the given landmark and a properly embedded metallic implant within the anatomical model to compute the extent of heating generated around the implant.Specifically, this MDDT is the in silico analog of an MRI scan for an elderly female subject with a metallic orthopedic implant at 1.5 T in a full-body birdcage RF coil.

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Section: Vhp Female V 50 Anatomical Human Model (Doi 1020298/vhp-fema...mentioning

confidence: 99%

Section: Vhp Female V 50 Anatomical Human Model (Doi 1020298/vhp-fema...mentioning

confidence: 99%

Computational Tool Comprising Visible Human Project® Based Anatomical Female CAD Model and Ansys HFSS/Mechanical® FEM Software for Temperature Rise Prediction Near an Orthopedic Femoral Nail Implant During a 1.5 T MRI Scan

Noetscher

Serano

Nazarian

et al. 2022

Brain and Human Body Modelling 2021

View full text Add to dashboard Cite

show abstract

“…Some recent uses of the VHP Female v3.0-5.0 computational human model have been documented in the literature-cf. for example [25][26][27][28][29][30][31][32][33][34][35][36][37][38][39][40][41][42]-and compared with experimental data on radio frequency propagation. A number of studies have focused on the characteristics and behaviors of antennas near the human body [26][27][28][29][30][31][32][33][34].…”

Section: Introductionmentioning

confidence: 99%

“…for example [25][26][27][28][29][30][31][32][33][34][35][36][37][38][39][40][41][42]-and compared with experimental data on radio frequency propagation. A number of studies have focused on the characteristics and behaviors of antennas near the human body [26][27][28][29][30][31][32][33][34]. Others have examined through simulation various biomedical applications including transmission channel modeling [35], transcranial direct current stimulation [36], estimation of bone density [37], gastroenterology [38,39], SAR simulations in MRI coils at 3 T [40], and safety of active implants under MRI procedures [41,42].…”

Section: Introductionmentioning

confidence: 99%

Visible Human Project® female surface based computational phantom (Nelly) for radio-frequency safety evaluation in MRI coils

et al. 2021

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Quantitative modeling of specific absorption rate and temperature rise within the human body during 1.5 T and 3 T MRI scans is of clinical significance to ensure patient safety. This work presents justification, via validation and comparison, of the potential use of the Visible Human Project (VHP) derived Computer Aided Design (CAD) female full body computational human model for non-clinical assessment of female patients of age 50–65 years with a BMI of 30–36 during 1.5 T and 3 T based MRI procedures. The initial segmentation validation and four different application examples have been identified and used to compare to numerical simulation results obtained using VHP Female computational human model under the same or similar conditions. The first application example provides a simulation-to-simulation validation while the latter three application examples compare with measured experimental data. Given the same or similar coil settings, the computational human model generates meaningful results for SAR, B1 field, and temperature rise when used in conjunction with the 1.5 T birdcage MRI coils or at higher frequencies corresponding to 3 T MRI. Notably, the deviation in temperature rise from experiment did not exceed 2.75° C for three different heating scenarios considered in the study with relative deviations of 10%, 25%, and 20%. This study provides a reasonably systematic validation and comparison of the VHP-Female CAD v.3.0–5.0 surface-based computational human model starting with the segmentation validation and following four different application examples.

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Radio Frequency Propagation Close to the Human Ear and Accurate Ear Canal Models

Cited by 2 publications

References 5 publications

Computational Tool Comprising Visible Human Project® Based Anatomical Female CAD Model and Ansys HFSS/Mechanical® FEM Software for Temperature Rise Prediction Near an Orthopedic Femoral Nail Implant During a 1.5 T MRI Scan

Computational Tool Comprising Visible Human Project® Based Anatomical Female CAD Model and Ansys HFSS/Mechanical® FEM Software for Temperature Rise Prediction Near an Orthopedic Femoral Nail Implant During a 1.5 T MRI Scan

Visible Human Project® female surface based computational phantom (Nelly) for radio-frequency safety evaluation in MRI coils

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