Which of the following is considered MR safe?

A gauze wrap is considered MR safe primarily because it is made from non-metallic materials that do not have magnetic properties. This means that when exposed to the strong magnetic fields of an MRI machine, a gauze wrap will not interfere with the imaging process or pose risks to the patient. It is chemically inert and does not conduct electricity, which makes it safe for use in the MRI environment.

Other items, such as metallic stents and sternal wires, typically contain metals that can interact with the MRI's magnetic field, posing potential safety risks such as migration, heating, or artifacts in the images. Carbon fiber braces, while generally non-magnetic, may still contain metallic components in their design, which could complicate their safety status in an MR setting. Therefore, gauze wrap stands out as the best option for MR safety.