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Savazzi, M., Felício, J. M., Costa, J. R., Fernandes, C. A. & Conceição, R. (2021). Study of freezing and defrosting effects on complex permittivity of biological tissues. IEEE Antennas and Wireless Propagation Letters. 20 (12), 2210-2214

M. Savazzi et al.,  "Study of freezing and defrosting effects on complex permittivity of biological tissues", in IEEE Antennas and Wireless Propagation Letters, vol. 20, no. 12, pp. 2210-2214, 2021

@article{savazzi2021_1714026235218,
	author = "Savazzi, M. and Felício, J. M. and Costa, J. R. and Fernandes, C. A. and Conceição, R.",
	title = "Study of freezing and defrosting effects on complex permittivity of biological tissues",
	journal = "IEEE Antennas and Wireless Propagation Letters",
	year = "2021",
	volume = "20",
	number = "12",
	doi = "10.1109/LAWP.2021.3102842",
	pages = "2210-2214",
	url = "https://ieeexplore.ieee.org/document/9508191"
}

TY  - JOUR
TI  - Study of freezing and defrosting effects on complex permittivity of biological tissues
T2  - IEEE Antennas and Wireless Propagation Letters
VL  - 20
IS  - 12
AU  - Savazzi, M.
AU  - Felício, J. M.
AU  - Costa, J. R.
AU  - Fernandes, C. A.
AU  - Conceição, R.
PY  - 2021
SP  - 2210-2214
SN  - 1536-1225
DO  - 10.1109/LAWP.2021.3102842
UR  - https://ieeexplore.ieee.org/document/9508191
AB  - In this letter we study the effect of freezing and defrosting on the dielectric properties of biological tissues. The electromagnetic characterization of tissues at microwave frequencies is crucial for the development of microwave-based biomedical devices. These measurements are often not practical, as tissue degradation restricts the time available between tissue excision and dielectric measurements. For this reason, measurement of tissues that underwent freezing and defrosting may provide researchers with more flexibility in setting measurement campaigns, thus speeding up the development of microwave-based biomedical devices. To this end, this letter presents dielectric measurement on frozen and defrosted tissue, which translates into the following objectives: first, investigate if the dielectric properties of defrosted tissues depend on frozen storage time; second, determine if defrosted tissue dielectric properties differ from those of fresh tissues. As a result, we measure the dielectric properties of ten samples of chicken muscle, bovine liver, and bovine fat, each before and after freezing (up to 14 days) and defrosting. The measurements are performed with the open-ended coaxial probe method at the frequency band of 0.5–8.5 GHz. We observe a slight increase—less than 10%—in complex permittivity of high-water-content tissues (muscle and liver) after defrosting, and negligible effect on fat tissues.
ER  -