Intraoperative MR systems: Low-field approaches

Numerous different concepts in low- and mid-field intervention have been described and applied for percutaneous intervention and intraoperative MR imaging, and each has demonstrated usefulness in specific applications. As the use of interventional methods under MR imaging expands, the imaging systems used for intervention will continue to evolve. More than likely, different system designs will be advocated for different interventional applications. The ultimate choice of interventional system will depend on each institution's optimal balance among the types of procedures to be performed, the required image quality, and the financial constraints.