Elektrik Elektronik Fakültesi
Bu topluluk için Kalıcı Uri
Gözat
Yazar "Ateş Alkan, Fatma" ile Elektrik Elektronik Fakültesi'a göz atma
Sayfa başına sonuç
Sıralama Seçenekleri
-
ÖgeIn vitro dielectric properties of rat skin tissue for microwave skin cancer detection(IEEE, 2019) Aydınalp, Cemanur ; joof, Sulayman ; Yılmaz, Tuba ; Pastacı Özsobacı, Nural ; Ateş Alkan, Fatma ; Akduman, İbrahim ; Elektronik ve Haberleşme Mühendisliği ; Electronics and Communication EngineeringDermal tissue characterization based on dielectric properties can be utilized as a non-invasive method for diagnosis of skin cancers. To enable such technology, there is a need to develop techniques that can rapidly and accurately collect the dielectric properties of the skin tissues. Therefore, the current measurement techniques and tools has to be optimized for skin cancer detection. To this end, this study presents dielectric property measurements with open-ended coaxial probes having small apertures customized for detection of skin cancer. Relative permittivity and conductivity of rat skin tissue is characterized with open-ended coaxial probes with outer diameters of 0.9mm and 0.5mm between 0.5GHz6GHz and the measurement results are compared with the traditional probes having diameter of 2.2mm. The results agree well with the reported literature data.
-
ÖgeIn vivo dielectric properties of healthy and benign rat mammary tissues from 500 MHz to 18 GHz(MDPI, 2020-04) Yılmaz, Tuba ; Ateş Alkan, Fatma ; Elektronik ve Haberleşme Mühendisliği ; Electronics and Communication EngineeringThis work investigates the in vivo dielectric properties of healthy and benign rat mammary tissues in an attempt to expand the dielectric property knowledge of animal models. The outcomes of this study can enable testing of microwave medical technologies on animal models and interpretation of tissue alteration-dependent in vivo dielectric properties of mammary tissues. Towards this end, in vivo dielectric properties of healthy rat mammary tissues and chemically induced benign rat mammary tumors including low-grade adenosis, sclerosing adenosis, and adenosis were collected with open-ended coaxial probes from 500 MHz to 18 GHz. The in vivo measurements revealed that the dielectric properties of benign rat mammary tumors are higher than the healthy rat mammary tissues by 9.3% to 35.5% and 19.6% to 48.7% for relative permittivity and conductivity, respectively. Furthermore, to our surprise, we found that the grade of the benign tissue affects the dielectric properties for this study. Finally, a comparison with ex vivo healthy human mammary tissue dielectric properties revealed that the healthy rat mammary tissues best replicate the dielectric properties of healthy medium density human samples.