What statement should a nurse make to a client undergoing an MRI scan to explain the procedure?

The correct statement addresses an essential aspect of the MRI experience — the noise generated during the scan. MRI machines produce loud noises due to the rapid switching of magnetic fields, which can be startling or uncomfortable for patients. Informing the client that they will be allowed to wear earplugs during the procedure helps reduce anxiety by preparing them for the sound and providing a means to mitigate it. This approach demonstrates the nurse's consideration for the patient's comfort and understanding of the procedure.

In contrast, movement during an MRI can lead to image distortion; thus, emphasizing that movement is not a concern is misleading and contradictory to the necessary instructions given to patients to lie still for optimal imaging. The claim regarding the iodine in MRI contrast agents is also inaccurate, as most MRI contrast agents, like gadolinium, do not contain iodine, which is found in some CT contrast dyes. Lastly, while some MRI scans can be brief, the duration can vary significantly depending on the specific area being examined, so stating a definitive duration of no longer than 30 minutes may not apply to all cases and can mislead the patient. Thus, the explanation about earplugs accurately prepares the patient for the specific experience of undergoing an MRI.