Selectivity Analysis of Electrical Capacitance Volume Tomography (ECVT) as a Breast Cancer Scanner

    Ifnia Widora, MS Thesis, Dept. of Physics, University of Indonesia, 2014

    In  the  previous study, a novel sensor for Electrical Capacitance Volume Tomography (ECVT) to map the distribution of tumor inside the  human breast has  been developed . The ECVT provides a volumetric image of permittivity distribution of the breast tissue, showing higher permittivity of abnormal tissue characterized with a simple cyst,  a benign tumor or a malignant cancer as compared with normal breast. In this study, we evaluate the selectivity of the ECVT to differentiate malignant cancers from benign tumors.  Serial cases involving 120 patients diagnosed with simple cysts, benign tumors or malignant cancers by Ultrasonography (USG) are scanned using the ECVT, and the images from both of the modalities are compared. It is found that the maximum voxel permittivity value of the reconstructed volumetric image is correlated strongly with the malignancy of the tumor identified by the USG. 89.55% of all malignant data reside above 0.3 in the normalized maximum permittivity value of the reconstructed ECVT image, while 94.4% of simple cyst or benign tumor is in the range below 0.3. This findings suggest the feasibility of the ECVT technique to differentiate the malignant cancer from benign tumor with relatively high
    selectivity.
    Keywords: ECVT, USG, Breast Cancer, Selectivity