DESIGN OF A UHF APPLICATOR FOR REWARMING OF CRYOPRESERVED BIOMATERIALS

被引：16

作者：

EVANS, S ^{[1
]}

RACHMAN, MJ ^{[1
]}

PEGG, DE ^{[1
]}

机构：

[1] UNIV CAMBRIDGE,DEPT SURG,MRC,MED CRYOBIOL GRP,CAMBRIDGE CB2 2AH,ENGLAND

来源：

IEEE TRANSACTIONS ON BIOMEDICAL ENGINEERING | 1992年 / 39卷 / 03期

基金：

英国惠康基金;

关键词：

D O I：

10.1109/10.125006

中图分类号：

R318 [生物医学工程];

学科分类号：

0831 ;

摘要：

The dielectric properties of cryopreserved biological tissue are discussed in relation to the problems which arise when EM fields are used for rapid rewarming. The UHF band is favored from two aspects: the avoidance of thermal runaway and the uniformity of heating inhomogeneous material. Various resonant cavity applicators are considered for efficient and uniform rewarming. The square-aspect TE 111 cylindrical applicator is favored principally because it allows variation of the E-field orientation as required during the warming profile. An appropriate kidney phantom organ is described. It is used to obtain measured values of the overall efficiency of a TE 111 applicator. The efficiency values are found to fall steadily with increasing temperature from 85% at -40-degrees-C to 45% at the phase change, mainly due to the decreasing tan delta-value of the phantom material.

引用

页码：217 / 225

页数：9

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