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- W2372635522 abstract "The temperature measurement and control is a key factor to Hyperthermia(HIFU),but the fast, accurate, low-cost technology real-time detection of the temperature is lacking off. This research developed a device to test the relationship of tissue impedance and temperature, which can provide the basis for temperature detection during HIFU. The tissue was heated by water circulation, of use which the temperature is easy to control and heated homogeneous. The four electrode method was used in this device, which can effectively avoid the contact resistance and polarization effects, etc. A high output impedance constant current source was designed; its output impedance is 212 kΩ at a frequency of 1 MHz. Two fresh fat tissue were tested to obtain the impedance's temperature characteristic and the frequency characteristic, the frequency characteristics are:the real part of impedance decreases with increasing frequency, the imaginary part decreases and increases with increasing frequency, the transition frequency is between 80~120 k Hz, while temperature characteristics are: when the temperature is less than 53 ℃, tissue impedance presented as the temperature decreases slowly, and during 53~59 ℃, the impedance formed a mutant, showing the critical organizational changes, which provides a theoretical and experimental basis for further hyperthermia process technology based on electrical impedance temperature nondestructive monitoring." @default.
- W2372635522 created "2016-06-24" @default.
- W2372635522 creator A5080216955 @default.
- W2372635522 date "2014-01-01" @default.
- W2372635522 modified "2023-09-23" @default.
- W2372635522 title "The research of a temperature feature of tissue impedance testing system" @default.
- W2372635522 hasPublicationYear "2014" @default.
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