ArticleSensors (Basel, Switzerland)2020
Effect of Open-Ended Coaxial Probe-to-Tissue Contact Pressure on Dielectric Measurements.
Article in Sensors (Basel, Switzerland), 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 15 papers.
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Who cites it
15 citing papers in PubMed.
- Force-regulated robotic diffuse reflectance spectroscopy scanning.Journal of biomedical optics · 2026Article
- The Origin of Dielectric Permittivity in Plants.International journal of molecular sciences · 2026Review
- Validation of a Low-Cost Open-Ended Coaxial Probe Setup for Broadband Permittivity Measurements up to 6 GHz.Sensors (Basel, Switzerland) · 2025Article
- Effect of Physiologically Relevant Dehydration on the Dielectric Properties of Ground Beef.Bioelectromagnetics · 2025Article
- Review
- Dielectric Characterization of Ex-Vivo Breast Tissues: Differentiation of Tumor Types through Permittivity Measurements.Cancers · 2024Article
- Review
- Probe Contact Force Monitoring during Conductivity Measurements of the Left Atrial Appendage to Support the Design of Novel Diagnostic and Therapeutic Procedures.Sensors (Basel, Switzerland) · 2022Article
- Dielectric Permittivity Measurement Using Open-Ended Coaxial Probe-Modeling and Simulation Based on the Simple Capacitive-Load Model.Sensors (Basel, Switzerland) · 2022Article
- Classification of rat mammary carcinoma with large scale in vivo microwave measurements.Scientific reports · 2022Article
- Controlled Measurement Setup for Ultra-Wideband Dielectric Modeling of Muscle Tissue in 20-45 °C Temperature Range.Sensors (Basel, Switzerland) · 2021Article
- Sensitivity and Accuracy of Dielectric Measurements of Liquids Significantly Improved by Coupled Capacitive-Dependent Quartz Crystals.Sensors (Basel, Switzerland) · 2021Article
- Broadband Dielectric Properties of Ex Vivo Bovine Liver Tissue Characterized at Ablative Temperatures.IEEE transactions on bio-medical engineering · 2021Article
- Development of an Anthropomorphic Phantom of the Axillary Region for Microwave Imaging Assessment.Sensors (Basel, Switzerland) · 2020Article
- Characterisation of Ex Vivo Liver Thermal Properties for Electromagnetic-Based Hyperthermic Therapies.Sensors (Basel, Switzerland) · 2020Article
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Authors and funding
4 authors.
Funding
Abstract
Open-ended coaxial probes are widely used to gather dielectric properties of biological tissues. Due to the lack of an agreed data acquisition protocol, several environmental conditions can cause inaccuracies when comparing dielectric data. In this work, the effect of a different measurement probe-to-tissue contact pressure was monitored in the frequency range from 0.5 to 20 GHz. Therefore, we constructed a controlled lifting platform with an integrated pressure sensor to exert a constant pressure on the tissue sample during the dielectric measurement. In the pressure range from 7.74 kPa to 77.4 kPa, we observed a linear correlation of - 0 . 31 ± 0 . 09 % and - 0 . 32 ± 0 . 14 % per kPa for, respectively, the relative real and imaginary complex permittivity. These values are statistically significant compared with the reported measurement uncertainty. Following the literature in different biology-related disciplines regarding pressure-induced variability in measurements, we hypothesize that these changes originate from squeezing out the interstitial and extracellular fluid. This process locally increases the concentration of membranes, cellular organelles, and proteins in the sensed volume. Finally, we suggest moving towards a standardized probe-to-tissue contact pressure, since the literature has already demonstrated that reprobing at the same pressure can produce repeatable data within a 1% uncertainty interval.
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