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The Resistivity of Human Brain Tumours In Vivo
1Faculty of Biomedical Sciences and Engineering, Tampere University of Technology, Tampere, Finland. latikka@student.tut.fi.
Annals of Biomedical Engineering
|January 6, 2019
Summary
Electrical resistivity differs significantly between brain tumor types and healthy tissue. This finding could improve medical imaging and tumor classification, aiding in diagnosis and treatment planning.
Area of Science:
- Neuroscience
- Biophysics
- Medical Imaging
Background:
- Histological differences between tumor and healthy brain tissue suggest variations in electrical properties.
- Accurate electrical resistivity values are crucial for medical imaging techniques like impedance tomography and EEG source localization.
- Limited in vivo human data exists for brain tumor electrical resistivity.
Purpose of the Study:
- To develop a controlled method for measuring in vivo electrical resistivity of living brain tissues.
- To investigate and compare the electrical resistivity of different brain tumor types (meningiomas, low-grade gliomas, high-grade gliomas) and healthy brain tissue.
- To assess the potential of resistivity measurements for distinguishing tumor types and healthy tissue.
Main Methods:
- Development of a controlled experimental method for in vivo electrical resistivity measurements.
- Data collection during brain tumor removal surgeries.
- Categorization of tumors into meningiomas, low-grade gliomas, high-grade gliomas (glioblastomas), and other lesions for analysis.
Main Results:
- Average resistivity values: meningiomas (530 Ω-cm), low-grade gliomas (160 Ω-cm), high-grade gliomas (498 Ω-cm).
- Statistically significant differences observed between high-grade and low-grade gliomas, and between meningiomas and low-grade gliomas.
- Tumor resistivity values differed from surrounding healthy brain tissue by 40% to 330%.
Conclusions:
- Brain tumor types exhibit distinct electrical resistivity properties.
- Electrical resistivity measurements show potential for differentiating tumor tissue from healthy brain tissue.
- Resistivity values may aid in the identification and classification of specific brain tumor types.
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