Crosswell Electromagnetic Tomography: Some Results Using Born Approximation

A method of crosswell electromagnetic imaging is<br>presented and used to analyze the relevant parameters<br>for electromagnetic tomography. The influence of a<br>punctual inhomogeneity on the magnetic field is<br>calculated through the Sensitivity function based on<br>Born approximation. The analysis of the extremals of<br>that function is applied to generate crosswell images.<br>The method showed that the resolution is very good<br>vertically and very poor horizontally. Images are not<br>affected by increasing the number of receivers and<br>their horizontal alignment with the scatter, but local<br>maxima occur if transmitter and scatter are not<br>horizontally aligned. Furthermore, vertical resolution<br>is improved for increasing number of transmitters and<br>the aperture. These results are in agreement with<br>those well known in electromagnetic tomography literature.