A Subspace Preconditioned LSQR Gauss-Newton  Method with a Constrained Line Search Path Applied to  3D Biomedical Microwave Imaging

<div>A view of the dipole configuration for the realistic breast phantom. Dipole positions are indicated with dots and orientations with arrows. All dipoles act as receiver and transmitting dipoles are indicated with larger dots. The gray shape represents the outline of the breast phantom. Distances are in m.</div>

International Journal of Antennas and Propagation

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Figure 15

Figure 15: A Subspace Preconditioned LSQR Gauss-Newton  Method with a Constrained Line Search Path Applied to  3D Biomedical Microwave Imaging 