SmartProbe: a bioimpedance sensing system for head and neck cancer tissue detection

Zhuoqi Cheng*, Andrea Luigi Camillo Carobbio, Lara Soggiu, Marco Migliorini, Luca Guastini, Francesco Mora, Marco Fragale, Alessandro Ascoli, Stefano Africano, Darwin Caldwell, Frank Rikki Mauritz Canevari, Giampiero Parrinello, Giorgio Peretti, Leonardo S Mattos

*Kontaktforfatter for dette arbejde

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Abstrakt

OBJECTIVES: This study presents SmartProbe, an electrical bioimpedance (EBI) sensing system based on a concentric needle electrode (CNE). The system allows the use of commercial CNEs for accurate EBI measurement, and was specially developed for in-vivo real-time cancer detection. APPROACH: Considering the uncertainties in EBI measurements due to the CNE manufacturing tolerances, we propose a calibration method based on statistical learning. This is done by extracting the correlation between the measured impedance value |Z|, and the material conductivity σ, for a group of reference materials. By utilizing this correlation, the relationship of σ and |Z| can be described as a function and reconstructed using a single measurement on a reference material of known conductivity. MAIN RESULTS: This method simplifies the calibration process, and is verified experimentally. Its effectiveness is demonstrate by results that show less than 6% relative error. An additional experiment is conducted for evaluating the system's capability to detect cancerous tissue. Four types of ex-vivo human tissue from the head and neck region, including mucosa, muscle, cartilage and salivary gland, are characterized using SmartProbe. The measurements include both cancer and surrounding healthy tissue excised from 10 different patients operated on for head and neck cancer. The measured data is then processed using dimension reduction and analyzed for tissue classification. The final results show significant differences between pathologic and healthy tissues in muscle, mucosa and cartilage specimens. SIGNIFICANCE: These results are highly promising and indicate a great potential for SmartProbe to be used in various cancer detection tasks.

OriginalsprogEngelsk
TidsskriftPhysiological Measurement
Vol/bind41
Udgave nummer5
ISSN0967-3334
DOI
StatusUdgivet - 3. jun. 2020
Udgivet eksterntJa

Bibliografisk note

© 2020 Institute of Physics and Engineering in Medicine.

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