Variations in calculated SAR with distance to the perfectly matched layer boundary for a human voxel model

被引：20

作者：

Findlay, R. P. ^{[1
]}

Dimbylow, P. J. ^{[1
]}

机构：

[1] Hlth Protect Agcy, Didcot OX11 0RQ, Oxon, England

来源：

PHYSICS IN MEDICINE AND BIOLOGY | 2006年 / 51卷 / 23期

关键词：

D O I：

10.1088/0031-9155/51/23/N02

中图分类号：

R318 [生物医学工程];

学科分类号：

0831 ;

摘要：

The purpose of this work was to investigate the dependence of whole-body averaged specific energy absorption rate (SAR), calculated using the finite-difference time-domain (FDTD) method, on the width of the free space region between a numerical phantom and the perfectly matched layer (pml) absorbing boundary. Results show that an increase in this width from 2 cells to 70 cells caused variations in the calculated whole-body averaged SAR of less than 2% for the FDTD code employing split-field pmls. Similarly, an increase in the width of the pml layer had little effect on the whole-body SAR values.

引用

收藏

页码：N411 / N415

页数：5

相关论文

共 13 条

[1] Perfectly matched layer for the FDTD solution of wave-structure interaction problems [J].

Berenger, JP .

IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION, 1996, 44 (01) :110-117

[2] A PERFECTLY MATCHED LAYER FOR THE ABSORPTION OF ELECTROMAGNETIC-WAVES [J].

BERENGER, JP .

JOURNAL OF COMPUTATIONAL PHYSICS, 1994, 114 (02) :185-200

[3] FDTD calculations of the whole-body averaged SAR in an anatomically realistic voxel model of the human body from 1 MHz to 1 GHz [J].

Dimbylow, PJ .

PHYSICS IN MEDICINE AND BIOLOGY, 1997, 42 (03) :479-490

[4] Fine resolution calculations of SAR in the human body for frequencies up to 3 GHz [J].

Dimbylow, PJ .

PHYSICS IN MEDICINE AND BIOLOGY, 2002, 47 (16) :2835-2846

[5]

DIMBYLOW PJ, 1996, P INT WORKSH VOX PHA, P1

[6] Effects of posture on FDTD calculations of specific absorption rate in a voxel model of the human body [J].

Findlay, RP ;

Dimbylow, PJ .

PHYSICS IN MEDICINE AND BIOLOGY, 2005, 50 (16) :3825-3835

[7]

FUJIWARA O, 2005, PRESENTATION ICEMC20

[8] Variability in EMF permittivity values: Implications for SAR calculations [J].

Hurt, WD ;

Ziriax, JM ;

Mason, PA .

IEEE TRANSACTIONS ON BIOMEDICAL ENGINEERING, 2000, 47 (03) :396-401

[9] ON IMPLEMENTING A NUMERIC HUYGENS SOURCE SCHEME IN A FINITE-DIFFERENCE PROGRAM TO ILLUMINATE SCATTERING BODIES [J].

MEREWETHER, DE ;

FISHER, R ;

SMITH, FW .

IEEE TRANSACTIONS ON NUCLEAR SCIENCE, 1980, 27 (06) :1829-1833

[10] ABSORBING BOUNDARY-CONDITIONS FOR THE FINITE-DIFFERENCE APPROXIMATION OF THE TIME-DOMAIN ELECTROMAGNETIC-FIELD EQUATIONS [J].

MUR, G .

IEEE TRANSACTIONS ON ELECTROMAGNETIC COMPATIBILITY, 1981, 23 (04) :377-382