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Development of a conductivity measurement method during installment of deep brain stimulation electrodes

Tapaninaho, Anna (2017)

 
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Tapaninaho, Anna
2017

Sähkötekniikka
Tieto- ja sähkötekniikan tiedekunta – Faculty of Computing and Electrical Engineering
This publication is copyrighted. You may download, display and print it for Your own personal use. Commercial use is prohibited.
Hyväksymispäivämäärä
2017-10-04
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Julkaisun pysyvä osoite on
http://urn.fi/URN:NBN:fi:tty-201709201919
Tiivistelmä
The dielectric properties of brain tissue such as conductivity depend on several factors including temperature and frequency. Thus, the conductivity values obtained post-mortem from tissue samples at high frequencies do not describe properly the behavior of the conductivity at body temperature at low frequencies. The brain tissue conductivity data is scarce and most of the measurements are done from tissue samples at very high frequencies.

The primary goal of this thesis was to examine different methods used for conductivity measurement and collect brain tissue conductivity data published in 2000 or later. These methods include e.g. intracerebral technique, electrode impedance tomography and MRI-based methods. This thesis includes studies made on both living humans and animals in addition to studies conducted on post-mortem tissue samples.

The final goal of this thesis was to develop a novel conductivity measurement method during installment of deep brain stimulation electrodes. The device used is a clinician programmer used for example in deep brain stimulation, called N’Vision by Medtronic. Thus, the method measures the conductivity directly from the brain tissue. The method has it challenges, such as control of the tissue environment, but we believe that the developed method can be used in brain tissue conductivity measurement.
Kokoelmat
  • Opinnäytteet - ylempi korkeakoulututkinto [32861]
Kalevantie 5
PL 617
33014 Tampereen yliopisto
oa[@]tuni.fi | Yhteydenotto | Tietosuoja | Saavutettavuusseloste
 

 

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Kalevantie 5
PL 617
33014 Tampereen yliopisto
oa[@]tuni.fi | Yhteydenotto | Tietosuoja | Saavutettavuusseloste