A patient has a 1 cm brain aneurysm clip. The package insert specifies the material the clip is made from. Which of the following metals would make it unsafe to scan this patient?

The correct choice regarding the safety of scanning a patient with a 1 cm brain aneurysm clip relates to the magnetic properties of the materials involved. In this case, 405 stainless steel contains ferromagnetic properties, which means that it can be attracted to magnetic fields produced by the MRI machine. This attraction can lead to movements of the clip, potentially causing injury to the patient or altering the positioning of the clip, which could pose significant risks during the imaging process.

In contrast, the other materials listed—Phynox, Elgiloy, and MP35N—are specifically designed to be non-ferromagnetic or minimally reactive in an MRI environment. These materials are generally considered safe for use in patients who need MRI procedures, as they do not pose the same risks associated with ferromagnetic materials like 405 stainless steel.

Understanding the properties of materials used in medical devices and their interaction with magnetic fields is crucial for ensuring patient safety during MRI scans.