“Magnetic Resonance Imaging (MRI) is safe but if something goes wrong, it can go very wrong” – Prof Dr KH Ng, Department of Radiology, University of Malaya, Kuala Lumpur, Malaysia
Magnetic Resonance Imaging (MRI) is one of the most rapidly advancing diagnostic imaging tools today. Hazards intrinsic to the MR environment must be understood, acknowledged and respected. MRI-related accidents do happen, however they were not reported in most countries.
There are several safety issues to be considered by the radiologists, clinicians, radiographers, nurses and medical physicists involving with MRI studies. These include: Static magnetic field-related issues such as forces on ferromagnetic materials Time varying magnetic field-related issues such as induced voltage, auditory considerations and thermal issues Site access restrictions Pregnancy-related issues Guidelines on claustrophobia, anxiety, sedation, analgesia and anesthesia Contrast agent safety
With the recent introduction of high field 3 Tesla MRI systems with powerful magnetic field gradients, MRI acoustic noise poses a serious safety concern. Devices previously MR safe or compatible may no longer be with these new systems since many claims for compatibility were established with the 1.5 T systems. Injuries from MRI accidents are occurring more frequently now and there is an urgent need for MRI facilities and health authorities to implement safety guidelines.
There is a need to disseminate information on safety recommendations, awareness and procedures to follow to prevent MR-related accidents. MRI safety guidelines should be established for all MRI centres. Written procedures for screening of patients must be available, read and understood by all authorised persons.
For the slides of Prof Dr Ng’s lecture, presented at the 12th ASEAN Association of Radiology Congress in Sep 2004, click here. (File size is 1.4Mb) You may need to before you can open the PDF file. |