scholarly journals Broadband Dielectric Properties of Ex Vivo Bovine Liver Tissue Characterized at Ablative Temperatures

2021 ◽  
Vol 68 (1) ◽  
pp. 90-98
Author(s):  
Hojjatollah Fallahi ◽  
Jan Sebek ◽  
Punit Prakash
Keyword(s):  
Dielectric Properties ◽  
Liver Tissue ◽  
Ex Vivo ◽  
Bovine Liver

Dielectric Properties of Ex Vivo Porcine Liver Tissue Characterized at Frequencies Between 5 and 500 kHz When Heated at Different Rates

2018 ◽  
Vol 65 (11) ◽  
pp. 2560-2568 ◽  
Author(s):  
Douglas Deas Yero ◽  
Fidel Gilart Gonzalez ◽  
Dirk Van Troyen ◽  
Guy A. E. Vandenbosch
Keyword(s):  
Dielectric Properties ◽  
Liver Tissue ◽  
Ex Vivo ◽  
Porcine Liver

Hyperspectral image-based analysis of thermal damage for ex-vivo bovine liver utilizing radiofrequency ablation

2021 ◽  
pp. 101564
Author(s):  
Mohamed Hisham Aref ◽  
Ibrahim H. Aboughaleb ◽  
Abou-Bakr M. Youssef ◽  
Yasser H. El-Sharkawy
Keyword(s):  
Radiofrequency Ablation ◽  
Thermal Damage ◽  
Hyperspectral Image ◽  
Ex Vivo ◽  
Bovine Liver

Increased Ablation Zones Using a Cryo-Based Internally Cooled Bipolar RF Applicator in Ex Vivo Bovine Liver

2009 ◽  
Vol 44 (12) ◽  
pp. 763-768 ◽  
Author(s):  
Hansjörg Rempp ◽  
Matthias Voigtländer ◽  
Stephan Clasen ◽  
Simone Kempf ◽  
Alexander Neugebauer ◽  
...  
Keyword(s):  
Ex Vivo ◽  
Bovine Liver ◽  
Internally Cooled

scholarly journals Determination of the optical properties of bovine liver tissue using integrating sphere technique

2018 ◽  
Vol 1 (1) ◽  
pp. 248-252
Author(s):  
Halil Arslan ◽  
Yasar Baris Dolukan
Keyword(s):  
Optical Properties ◽  
Liver Tissue ◽  
Tissue Sample ◽  
Bovine Liver ◽  
Integrating Sphere ◽  
Scattering Coefficients ◽  
Single Sphere ◽  
Microscope Slides ◽  
Good Agreement

The optical properties (absorption and reduced scattering coefficients, µa and µs’) of bovine liver tissue for 635 nm has been determined by using integrating sphere and inverse adding-doubling (IAD) techniques. For this purpose, total reflectance and total transmittance values of bovine liver tissue sample, which is placed between two microscope slides, have been measured by using single-sphere system. The measured values have been used as input parameters for IAD program to extract the µa and µs’ of the sample. In this study, µa and µs’ of bovine liver tissue for 635 nm have been determined to be 0.22 mm-1 and 0.51mm-1, respectively. These values, which yield 1.44 mm penetration depth, are in good agreement with the ones in the literature.

scholarly journals Mean Scatterer Spacing Estimation in Normal and Thermally Coagulated Ex Vivo Bovine Liver

2014 ◽  
Vol 36 (2) ◽  
pp. 79-97 ◽  
Author(s):  
Nicholas Rubert ◽  
Tomy Varghese
Keyword(s):  
Ex Vivo ◽  
Bovine Liver

A study of the dielectric properties of biological tissues: Ex-vivo vs preserved samples

2017 ◽  
Author(s):  
Irina L. Alborova ◽  
Julian Bonello ◽  
Lourdes Farrugia ◽  
Charles V. Sammut ◽  
Lesya N. Anishchenko
Keyword(s):  
Dielectric Properties ◽  
Ex Vivo ◽  
Biological Tissues

scholarly journals Exploiting Tissue Dielectric Properties to Shape Microwave Thermal Ablation Zones

Sensors ◽  
2020 ◽  
Vol 20 (14) ◽  
pp. 3960
Author(s):  
Anna Bottiglieri ◽  
Giuseppe Ruvio ◽  
Martin O’Halloran ◽  
Laura Farina
Keyword(s):  
Adipose Tissue ◽  
Dielectric Properties ◽  
Thermal Ablation ◽  
Ex Vivo ◽  
Reference Scenario ◽  
Target Tissue ◽  
Ablation Zone ◽  
Dielectric Characterization ◽  
Clinical Scenarios ◽  
Tissue Target

The dielectric characterization of tissue targets of microwave thermal ablation (MTA) have improved the efficacy and pre-procedural planning of treatment. In some clinical scenarios, the tissue target lies at the interface with an external layer of fat. The aim of this work is to investigate the influence of the dielectric contrast between fat and target tissue on the shape and size of the ablation zone. A 2.45 GHz monopole antenna is placed parallel to an interface modelled by fat and a tissue characterized by higher dielectric properties and powered at 30 and 60 W for 60 s. The performances of MTA are numerically investigated considering different interface scenarios (i.e., different widths of fat layer, shifts in the antenna alignment) and a homogeneous reference scenario. Experiments (N = 10) are conducted on ex vivo porcine tissue to validate the numerical results. Asymmetric heating patterns are obtained in the interface scenario, the ablation zone in the target tissue is two-fold to ten-fold the size of the zone in the adipose tissue, and up to four times larger than the homogenous scenario. The adipose tissue reflects the electromagnetic energy into the adjacent tissue target, reducing the heating in the opposite direction.

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