In-office MR imaging.

The development of new metal alloys, along with more innovative magnet technology, has permitted the construction of smaller magnets for magnetic resonance (MR) systems, which, in turn, has allowed development of MR imaging systems designed to be physically smaller than conventional whole-body MR imaging systems. These specialized devices are commonly referred to as "niche," "dedicated," or "extremity" MR imaging systems. Performing MR imaging procedures with this type of system offers distinct advantages that include reduced overall costs, more convenient installation and siting, and greater patient comfort and safety. Importantly, these critical features permit extremity MR imaging systems to be readily utilized in an "in-office" setting. This article will provide an overview of the technical aspects and clinical applications for extremity MR imaging systems, present patient management issues, and discuss the economic and practical considerations of the use of extremity MR imaging systems in an in-office environment.