Selection of ferrite powder for thermal coagulation therapy with alternating magnetic field
Selection of ferrite powder for thermal coagulation therapy with alternating magnetic field
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DOI：
10.1007/s10853-005-5698-x
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发表时间：
2005
影响因子：
4.5
通讯作者：
T. Maehara;Kensuke Konishi;T. Kamimori;H. Aono;H. Hirazawa;T. Naohara;S. Nomura;H. Kikkawa;Y. Watanabe;Kanji Kawachi
中科院分区：
文献类型：
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作者：
T. Maehara;Kensuke Konishi;T. Kamimori;H. Aono;H. Hirazawa;T. Naohara;S. Nomura;H. Kikkawa;Y. Watanabe;Kanji Kawachi
选择铁氧体粉末，以实现热凝固技术，其中通过施加来自外部线圈的交变磁场来局部加热肿瘤。镁铁氧体（MgFe 2 O 4）在交变磁场下的温升（ΔT）最大。对于所有样品，在交变磁场下的Δ T值随着频率（200-500 kHz）的增加而增加。镁铁氧体的发热能力约为1000 ℃。1.4 W/g，在4.0 kA/m（200 W，370 kHz）的交变磁场下。铁氧体粉末在交变磁场中的加热能力明显取决于磁滞损耗的大小。
Selection of ferrite powder was carried out to realize a thermal coagulation technique in which tumors are locally heated by an application of alternating magnetic field from external coils. Magnesium ferrite (MgFe2O4) showed the largest increase in temperature (ΔT) under an alternating magnetic field in all the ferrites examined. For all the samples, ΔTvalue under alternating magnetic field was increased with an increase in frequency (200–500 kHz). The heating ability for the Mg-ferrite was ca. 1.4 W/g under alternating magnetic field of 4.0 kA/m (200 W, 370 kHz). The heating ability in alternating magnetic field was clearly depended on the magnitude of the hysteresis loss for the ferrite powder.