What is the role of MRI in breast biopsy with needle localization?

Updated: Dec 28, 2015
  • Author: William Teh, MBChB, FRCR; more...
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Answer

The use of magnetic resonance imaging (MRI) localization reflects the increasing use of magnetic resonance mammography. Although a portion of MRI-depicted lesions can subsequently be localized with ultrasonography, some of them are mammographically and ultrasonographically occult, which means that they require MRI-guided needle biopsy or localization. [5, 15]

All of the major manufacturers of MRI units have made biopsy attachments available; these require the patient to be kept in a semiprone position. MRI is then performed with the intravenous administration of a gadolinium-based contrast agent, and the lesion is localized by using MRI-compatible localization needles. The correct placement of the needle can be confirmed by obtaining a T2-weighted MRI to verify the signal void to transfix the lesion.


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