The present invention describes a device for performing breast biopsies and/or
therapy within magnetic resonance imaging (MRI) systems. The apparatus includes
a RF receiver antenna for magnetic resonance imaging of the breast. The RF coil
includes openings in the front and side to provide access to the breast during
the procedure. Compression plates are integrated into the breast coil which compress
the breast either laterally or in the head/feet direction as required for optimal
access to the breast. The apparatus includes a mechanical device for positioning
interventional instruments in the breast such as biopsy or therapy instruments.
The mechanical positioning devices position the instrument along the desired trajectory
to the target site and insert the instrument into the breast while the patient
remains inside the MRI scanner. Real time MR images may be acquired during instrument
alignment and insertion to verify the trajectory. The mechanical positioning devices
allow manipulation of instruments in any type of MRI scanner, including high field
MRI systems with cylindrical magnets. The positioning devices provide a means to
overcome limited access to the patient in MRI scanners. The positioning devices
may be manually operated by means of gears, drive shafts, cables or other mechanical
means. Or they may be electronically controlled by means of MR compatible motorized
drive systems. The devices may be remotely controlled from outside the magnet for
MRI systems that have limited access to the patient in the magnet. An interface
between the electronically controlled drivers and the MRI scanner computer can
provide robotic control of the instrument.
