Time Reversal Algorithm with Finite-Difference Time-Domain Method Software implementation of a microwave imaging technique for breast cancer early diagnosis.

This repo contains Matlab files I have wrote for my graduation project. This project is based on a paper by P. Kosmas & C.M. Rappaport.

• Run WithTumor.m and WithoutTumor.m. These will collect data from 3D simulated tissue. Collected data is exported to withtumor.mat and withouttumor.mat files.
• Then run TR.m file. This is time reversal algorithm. It will take difference signals from previous two simulations. Filters the signal using some special filter, then propagates it in the same environment backwards in time. 2D slice of electrical Field in the 3D environment is visualised in every n iterations. Hopefully you can see tumor in the visual.

Tumor inside dielectric medium observed by linear antenna array

Dielectric medium without tumor observed by linear array

Time Reversal of linear array, dielectric medium

Time Reversal of linear array, conductive medum

Tumor inside conductive medium observed by linear array

Conductive medium without tumor observed by linear array

2D lossless FTDT causal-time simulation

same but with parameters choosen by Kosmas et al.

2D lossy simulation

2D lossy simulation with tissue material

3D lossless sim

3D sim with material

3D lossy with

Retrieved from Pelin Cerav's work.