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MRI is excellent for looking at scar tissue. MRI is able to distinguish between scar tissue and recurrent tumors. Therefore, breast MRI can evaluate a significant change in the lumpectomy site. It can determine how much cancer has spread beyond the surgical site after a breast biopsy or lumpectomy.
Main article: Phase Contrast Magnetic Resonance Imaging. Phase Contrast MRI (PC-MRI) is used to measure flow velocities in the body. It is mainly used to measure blood flow in the heart and throughout the body. PC-MRI can be considered a method of Magnetic Resonance Velocimetry.