Magnetic Resonance Imaging (MRI) Practice Test 2025 – The Comprehensive All-in-One Guide to Exam Success!

Steel is an effective material for lining the walls or floors of an MR magnet room primarily due to its magnetic properties. It has high permeability, meaning it can effectively redirect and contain the magnetic field generated by the MRI machine. By using steel, the fringe field, which is the area outside the magnet where the magnetic force decreases, can be significantly reduced. The presence of steel helps in confining the magnetic field to the desired area, enhancing safety and minimizing the interference with other equipment or objects outside the MR room.

The other materials do not provide the same level of efficacy in reducing the magnetic fringe field. Concrete has some weight and might provide structural support, but it does not have significant magnetic properties to shield against the magnetic field. Wood and glass have no magnetic characteristics and would not contribute to the containment of the magnetic field, making them unsuitable for this application. This makes steel the superior choice for managing and reducing the fringe field effectively.