False triggering of an ultraviolet flame detector after 99mTc-MDP injection

Area of Science:

• Nuclear medicine
• Medical physics
• Radiological safety

Background:

• Radioisotopes are increasingly used in medical diagnostics and therapies.
• Security measures and radioisotope use have risen, leading to more detector alarms.
• Ultraviolet-spectrum flame detectors are common in public facilities.

Observation:

• A patient undergoing bone scintigraphy with technetium-99m methylene diphosphonate (99mTc-MDP) activated a restroom's ultraviolet-spectrum flame detector.
• The radiation dose rate from the patient was measured at 11.82 μSv/h at 100 cm, 2.5 hours post-administration.
• This is the first reported instance of diagnostic 99mTc triggering a flame detector.

Findings:

• Diagnostic radioisotope administration can lead to unexpected environmental interactions.
• The emitted radiation from 99mTc-MDP was sufficient to trigger sensitive flame detection technology.
• Existing literature primarily documents radiation detector false alarms from isotopes used therapeutically.

Implications:

• Healthcare providers and facility managers should be aware of potential interactions between medical radioisotopes and safety equipment.
• Further research is needed to assess the risk of other radioisotopes and detection systems.
• This case highlights the importance of considering patient-released radiation in public safety protocols.