What is a risk associated with a quench malfunction?

A quench malfunction in a magnetic resonance imaging (MRI) system occurs when the superconducting magnets lose their superconducting state, resulting in a rapid release of helium gas, which is used to maintain the low temperatures necessary for the magnets to operate. When a quench happens, the superconducting material heats up, and the helium gas expands rapidly. This expansion of helium can displace air in the surrounding area, creating a risk of asphyxiation or a reduced oxygen level in the environment.

In this context, the correct choice highlights the potential danger associated with the rapid release and expansion of helium gas during a quench. This displacement of air is a significant safety concern, particularly in confined spaces where ventilation may be limited. It is critical for personnel to be aware of this risk and ensure proper safety measures are in place to mitigate the potential hazards of a quench malfunction during MRI operations.