Conductivity and permittivity imaging at 3.0T.
Conductivity and permittivity imaging at 3.0T.
复制标题
电导率和介电常数成像为3.0t。
DOI:
10.1002/cmr.b.21204
复制
发表时间:
2012-02-01
期刊:
影响因子:
--
通讯作者:
Yeo DT
中科院分区:
文献类型:
--
作者:
Bulumulla SB;Lee SK;Yeo DT
Tissue conductivity and permittivity are critical to understanding local radio frequency (RF) power deposition during magnetic resonance imaging (MRI). These electrical properties are also important in treatment planning of RF thermotherapy methods (e.g. RF hyperthermia). The electrical properties may also have diagnostic value as malignant tissues have been reported to have higher conductivity and higher relative permittivity than surrounding healthy tissue. In this study, we consider imaging conductivity and permittivity using MRI transmit field maps (B1+ maps) at 3.0 Tesla. We formulate efficient methods to calculate conductivity and relative permittivity from 2-dimensional B1+ data and validate the methods with simulated B1+ maps, generated at 128 MHz. Next we use the recently introduced Bloch-Siegert shift B1+ mapping method to acquire B1+ maps at 3.0 Tesla and demonstrate conductivity and relative permittivity images that successfully identify contrast in electrical properties.
登录
查看更多内容
影响因子:
4.4
作者:
Yeo, Desmond T. B.;Wang, Zhangwei;Hancu, Ileana
通讯作者:
Hancu, Ileana
影响因子:
3.5
作者:
HAACKE, EM;PETROPOULOS, LS;WU, DH
通讯作者:
WU, DH
影响因子:
3.3
作者:
van Lier, Astrid L. H. M. W.;Brunner, David O.;van den Berg, Cornelis A. T.
通讯作者:
van den Berg, Cornelis A. T.
影响因子:
3.8
作者:
Das, SK;Clegg, ST;Samulski, TV
通讯作者:
Samulski, TV
影响因子:
8.2
作者:
Kärkkäinen, KK;Sihvola, AH;Nikoskinen, KI
通讯作者:
Nikoskinen, KI