Multiple Frequency Distorted Born Iterative Method for Tomographic Imaging
The goal of ultrasound tomography is to produce a two-dimensional (2D) map of the acoustical properties of a region of interest (ROI) from measurements of the acoustic field taken outside the ROL This map or image can prove very useful in medical diagnosis, non-destructive evaluation, and earth sciences [2, 5, 8, 12]. One solution of the tomographic imaging problem is by solving the inverse scattering problem [2, 4, 6, 10]. The inverse scattering problem is dependent on the total field inside the ROI which is unknown and is dependent on medium properties. This makes the inverse scattering problem nonlinear, and difficult to solve. A linearized, Born-approximate wave equation is usually inverted instead [4, 12].
KeywordsInhomogeneous Medium Scattered Field Total Field Multiple Frequency Scattering Function
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