AustinMan and AustinWoman: High-fidelity, anatomical voxel models developed from the VHP color images

Massey, Jackson W.; Yılmaz, Ali E.

doi:10.1109/embc.2016.7591444

Cited by 74 publications

(40 citation statements)

References 16 publications

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“…The antenna was modeled based on measurements of the disassembled unit and consisted principally of a circular radiating element with a diameter of one λ and a circular reflector element with a diameter of 16 cm. We used 2 mm resolution AustinMan Electromagnetic Voxel v2.5 phantom [Massey and Yilmaz, ] to evaluate both E‐field distribution and SAR 10g value in areas of interest (sagittal and coronal plane of the head). The antenna was placed 30 cm away from the right face of the phantom, and reference power was set to 2 W. According to numerical simulation, maximal SAR 10g value reached 0.405 W/kg (Fig.…”

Section: Methodsmentioning

confidence: 99%

Heart rate variability affected by radiofrequency electromagnetic field in adolescent students

Misek

Belyaev

Jakušová

et al. 2018

Bioelectromagnetics

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This study examines the possible effect of radiofrequency (RF) electromagnetic fields (EMF) on the autonomic nervous system (ANS). The effect of RF EMF on ANS activity was studied by measuring heart rate variability (HRV) during ortho-clinostatic test (i.e., transition from lying to standing and back) in 46 healthy grammar school students. A 1788 MHz pulsed wave with intensity of 54 ± 1.6 V/m was applied intermittently for 18 min in each trial. Maximum specific absorption rate (SAR ) value was determined to 0.405 W/kg. We also measured the respiration rate and estimated a subjective perception of EMF exposure. RF exposure decreased heart rate of subjects in a lying position, while no such change was seen in standing students. After exposure while lying, a rise in high frequency band of HRV and root Mean Square of the Successive Differences was observed, which indicated an increase in parasympathetic nerve activity. Tympanic temperature and skin temperature were measured showing no heating under RF exposure. No RF effect on respiration rate was observed. None of the tested subjects were able to distinguish real exposure from sham exposure when queried at the end of the trial. In conclusion, short-term RF EMF exposure of students in a lying position during the ortho-clinostatic test affected ANS with significant increase in parasympathetic nerve activity compared to sham exposed group. Bioelectromagnetics. 39:277-288, 2018. © 2018 Wiley Periodicals, Inc.

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Section: Methodsmentioning

confidence: 99%

Heart rate variability affected by radiofrequency electromagnetic field in adolescent students

Misek

Belyaev

Jakušová

et al. 2018

Bioelectromagnetics

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“…A radiation box of 600 × 400 × 800 mm 3 shows the portion of the body considered during simulations. Realistic human body model has a voxel resolution of 1 × 1 × 1 mm 3 with 104, 328, 722 voxels that have been developed from the National Library of Medicine's Visible Human Project data set 33 . Note, during the simulations, the antenna is placed 4 mm below the top layer (skin) in the three-layer model and at 4 mm depth in the chest (muscles) in the realistic model.…”

mentioning

confidence: 99%

Ultra-Miniature Circularly Polarized CPW-Fed Implantable Antenna Design and its Validation for Biotelemetry Applications

Kaim

Kanaujia

Kumar

et al. 2020

Sci Rep

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the paper presents a coplanar waveguide (cpW)-fed ultra-miniaturized patch antenna operating in Industrial, Scientific and Medical (ISM) band (2.4-2.5 GHz) for biotelemetry applications. The proposed antenna structure is circular in shape and its ground plane is loaded with a pair of slots for obtaining circular polarization. In the proposed design, asymmetric square slots generate phase condition for right-hand circularly polarized (RHCP) radiation. And, by merely changing the position of the slots, either RHCP or left-hand circularly polarized (LHCP) radiation can be excited. In the proposed design, a meandered central strip is used for miniaturization. The simulations of the proposed antenna are carried out using Ansys HFSS software with a single-layer and multilayer human tissue models. The antenna shows good performance for different tissue properties owing to its wide axial ratio bandwidth and impedance bandwidth. The antenna is fabricated and measurements are carried out in skin mimicking phantom and pork. Simulated and measured performances of the antenna are in close agreement. The power link budget is also calculated using an exterior circularly polarized (CP) receiving antenna.Recent advances in technology lead to the design of small and low-power consuming biomedical devices that can be implanted inside a patient's body through surgical operation or ingestion. These embedded devices can sense data from inside the human body in real-time, offering a unique opportunity for early diagnosis and treatment of diseases. The embedded devices communicate with the external world in terms of telemetry. Telemetry includes data transmission from the implanted device to an external one and vice-versa.The standard requirement of all implantable medical devices (IMD) is the wireless operation of equipment and bidirectional data communication. The implantable antenna is one of the critical components for IMD for exchanging body anatomy data with installed base stations 1,2 . In the last few years, several prototypes of implantable patch antennas are proposed; but their radiation efficiency lacks in one or the other parameters such as gain, impedance bandwidth, axial ratio bandwidth; in few cases, antenna footprints are also large for implantation 3-11 . In 12-16 , dimensions of the antenna are significantly reduced making them best prototypes for implantation, but are prone to multipath fading because of their omnidirectional linearly polarized radiations. Though these antenna designs are highly compact, their gain, and impedance bandwidths are very less. Various types of antennas with a defected ground, fractal shape, spiral, slotted, PIFA have been proposed in the literature for wide impedance and axial ratio bandwidth [17][18][19][20] . However, most of the proposed antennas are linearly polarized with large and complex geometry. Few antennas reported consist of ground plane as the primary radiator, but most of them are linearly polarized and proposed for wireless applications. Since the profile of such antennas is...

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“…The result is a segmented upper torso that is merged with the head in a subsequent step (see subsequently). The AustinMan full‐body human model (version 2.4) from the visible human project serves as the torso atlas. This model originally features a very high in‐slice resolution of 0.3 × 0.3 mm 2 , with a slice thickness of 1 mm and a total of 64 segmented structures.…”

Section: Methodsmentioning

confidence: 99%

Semi‐automated generation of individual computational models of the human head and torso from MR images

Kalloch

Bode

Kozlov

et al. 2018

Magnetic Resonance in Med

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AustinMan and AustinWoman: High-fidelity, anatomical voxel models developed from the VHP color images

Cited by 74 publications

References 16 publications

Heart rate variability affected by radiofrequency electromagnetic field in adolescent students

Heart rate variability affected by radiofrequency electromagnetic field in adolescent students

Ultra-Miniature Circularly Polarized CPW-Fed Implantable Antenna Design and its Validation for Biotelemetry Applications

Semi‐automated generation of individual computational models of the human head and torso from MR images

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