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Akimasa Hirata

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Akimasa Hirata; Ilkka Laakso; Takuya Oizumi; Kwok Hung Chan; Ryuto Hanatani; Joe Wiart
The relationship between specific absorption rate and temperature elevation in anatomically based human body models for plane wave exposure from 30 MHz to 6 GHz.
Akimasa Hirata; Ilkka Laakso; Tomoaki Nagaoka; Soichi Watanabe; Kwok Hung Chan; Emmanuelle Conil; Osamu Fujiwara; Kazuya Yanase; Joe Wiart
Estimation of the whole-body averaged SAR of grounded human models for plane wave exposure at respective resonance frequencies.
Ilkka Laakso; Akimasa Hirata
Fast multigrid-based computation of the induced electric field for transcranial magnetic stimulation.

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2013: Akimasa Hirata; Ilkka Laakso; Takuya Oizumi; Kwok Hung Chan; Ryuto Hanatani; Joe Wiart
The relationship between specific absorption rate and temperature elevation in anatomically based human body models for plane wave exposure from 30 MHz to 6 GHz.
Physics in medicine and biology 2013;58(4):903-21.
2012: Akimasa Hirata; Ilkka Laakso; Tomoaki Nagaoka; Soichi Watanabe; Kwok Hung Chan; Emmanuelle Conil; Osamu Fujiwara; Kazuya Yanase; Joe Wiart
Estimation of the whole-body averaged SAR of grounded human models for plane wave exposure at respective resonance frequencies.
Physics in medicine and biology 2012;57(24):8427-42.
2012: Ilkka Laakso; Akimasa Hirata
Fast multigrid-based computation of the induced electric field for transcranial magnetic stimulation.
Physics in medicine and biology 2012;57(23):7753-65.
2012: Ilkka Laakso; Akimasa Hirata
Computational analysis of thresholds for magnetophosphenes.
Physics in medicine and biology 2012;57(19):6147-65.
2012: Ilkka Laakso; Shogo Tsuchida; Akimasa Hirata; Yoshitsugu Kamimura
Evaluation of SAR in a human body model due to wireless power transmission in the 10 MHz band.
Physics in medicine and biology 2012;57(15):4991-5002.
2012: Akimasa Hirata; Kwok Hung Chan; Junya Hattori; Teruyoshi Koyama; Toshihiro Nagai; Robert Kavet
Dispersive FDTD analysis of induced electric field in human models due to electrostatic discharge.
Physics in medicine and biology 2012;57(13):4447-58.
2012: Ilkka Laakso; Akimasa Hirata
Reducing the staircasing error in computational dosimetry of low-frequency electromagnetic fields.
Physics in medicine and biology 2012;57(4):N25-34.
2011: Ilkka Laakso; Akimasa Hirata
Dominant factors affecting temperature rise in simulations of human thermoregulation during RF exposure.
Physics in medicine and biology 2011;56(23):7449-71.
2011: Akimasa Hirata; Thanh Dovan; Osamu Fujiwara; Yukinori Takano; Robert Kavet
An electric field induced in the retina and brain at threshold magnetic flux density causing magnetophosphenes.
Physics in medicine and biology 2011;56(13):4091-101.
2010: Toshihiro Nagai; Akimasa Hirata
In situ electric fields causing electro-stimulation from conductor contact of charged human.
Radiation protection dosimetry 2010;140(4):351-6.
2010: Akimasa Hirata; Yukinori Takano; Yoshitsugu Kamimura; Osamu Fujiwara
Effect of the averaging volume and algorithm on the in situ electric field for uniform electric- and magnetic-field exposures.
Physics in medicine and biology 2010;55(9):N243-52.
2010: Akimasa Hirata; Kenichi Yamazaki; Shoji Hamada; Yoshitsugu Kamimura; Hiroo Tarao; Kanako Wake; Yukihisa Suzuki; Noriyuki Hayashi; Osamu Fujiwara
Intercomparison of induced fields in Japanese male model for ELF magnetic field exposures: effect of different computational methods and codes.
Radiation protection dosimetry 2010;138(3):237-44.
2009: Akimasa Hirata; Osamu Fujiwara
The correlation between mass-averaged SAR and temperature elevation in the human head model exposed to RF near-fields from 1 to 6 GHz.
Physics in medicine and biology 2009;54(23):7227-38.
2009: Akimasa Hirata; Naoki Ito; Osamu Fujiwara
Influence of electromagnetic polarization on the whole-body averaged SAR in children for plane-wave exposures.
Physics in medicine and biology 2009;54(4):N59-65.
2008: Akimasa Hirata; Naoki Ito; Osamu Fujiwara; Tomoaki Nagaoka; Soichi Watanabe
Conservative estimation of whole-body-averaged SARs in infants with a homogeneous and simple-shaped phantom in the GHz region.
Physics in medicine and biology 2008;53(24):7215-23.
2008: Peter Dimbylow; Akimasa Hirata; Tomoaki Nagaoka
Intercomparison of whole-body averaged SAR in European and Japanese voxel phantoms.
Physics in medicine and biology 2008;53(20):5883-97.
2008: Akimasa Hirata; Takayuki Asano; Osamu Fujiwara
FDTD analysis of body-core temperature elevation in children and adults for whole-body exposure.
Physics in medicine and biology 2008;53(18):5223-38.
2008: Akimasa Hirata; Hironori Sugiyama; Masami Kojima; Hiroki Kawai; Yoko Yamashiro; Osamu Fujiwara; Soichi Watanabe; Kazuyuki Sasaki
Computational model for calculating body-core temperature elevation in rabbits due to whole-body exposure at 2.45 GHz.
Physics in medicine and biology 2008;53(12):3391-404.
2008: Akimasa Hirata; Soichi Watanabe; Masao Taki; Osamu Fujiwara; Masami Kojima; Kazuyuki Sasaki
Computation of temperature elevation in rabbit eye irradiated by 2.45-GHz microwaves with different field configurations.
Health physics 2008;94(2):134-44.
2007: Akimasa Hirata; So-ichi Watanabe; Osamu Fujiwara; Masami Kojima; Kazuyuki Sasaki; Toshiyuki Shiozawa
Temperature elevation in the eye of anatomically based human head models for plane-wave exposures.
Physics in medicine and biology 2007;52(21):6389-99.
2007: Akimasa Hirata; Sachiko Kodera; Jianqing Wang; Osamu Fujiwara
Dominant factors influencing whole-body average SAR due to far-field exposure in whole-body resonance frequency and GHz regions.
Bioelectromagnetics 2007;28(6):484-7.
2007: Akimasa Hirata; Takayuki Asano; Osamu Fujiwara
FDTD analysis of human body-core temperature elevation due to RF far-field energy prescribed in the ICNIRP guidelines.
Physics in medicine and biology 2007;52(16):5013-23.
2007: Akimasa Hirata; Osamu Fujiwara
Dosimetry in Japanese male and female models for a low-frequency electric field.
Physics in medicine and biology 2007;52(15):N339-43.
2007: Akimasa Hirata
Improved heat transfer modeling of the eye for electromagnetic wave exposures.
IEEE transactions on bio-medical engineering 2007;54(5):959-61.
2007: Akimasa Hirata; Takayuki Asano; Osamu Fujiwara
FDTD computation of temperature elevation in human body for RF far-field exposure.
Conference proceedings : ... Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Conference 2007;2007():1164-7.
2006: Akimasa Hirata; Soichi Watanabe; Masami Kojima; Ikuho Hata; Kanako Wake; Masao Taki; Kazuyuki Sasaki; Osamu Fujiwara; Toshiyuki Shiozawa
Computational verification of anesthesia effect on temperature variations in rabbit eyes exposed to 2.45 GHz microwave energy.
Bioelectromagnetics 2006;27(8):602-12.
2006: Akimasa Hirata; Osamu Fujiwara; Toshiyuki Shiozawa
Correlation between peak spatial-average SAR and temperature increase due to antennas attached to human trunk.
IEEE transactions on bio-medical engineering 2006;53(8):1658-64.
2001: Akimasa Hirata; Krzysztof Caputa; Trevor W Dawson; Maria A Stuchly
Dosimetry in models of child and adult for low-frequency electric field.
IEEE transactions on bio-medical engineering 2001;48(9):1007-12.