In order for cryogen to not harm a patient, what needs to happen?

For cryogen to not harm a patient, it is essential that the cryogen is vented outside. Cryogens, such as liquid helium or liquid nitrogen, are used in MRI systems to maintain superconducting magnets at extremely low temperatures. When these materials boil off, they can create large volumes of gas which can displace oxygen in enclosed spaces, potentially leading to asphyxiation. By venting the cryogen outside, it is ensured that any gases released do not accumulate in the MRI room, thereby safeguarding the patients and staff from the risks associated with low oxygen levels.

This practice is vital in maintaining a safe environment in the MRI suite. Ensuring that the venting is done properly prevents the accumulation of harmful gases and mitigates the risks posed to patient safety during the procedure.