Live scanning at ultrasound scientific conferences and the need for prudent policy.

The practice of using live models to demonstrate ultrasonographic imaging equipment at scientific meetings has gained popularity in recent years. However, different medical conferences organisers take different positions, possibly due to differences in interpretation of the safety issue and their definition of medically relevant use of diagnostic ultrasound (US). Some offer little, or no, restriction and other US societies have produced policy that is subject to various interpretations. For example, some justify the practice of scanning live models on the basis of an assumed "educational" benefit, but this is virtually impossible to measure in an objective sense. One issue that seems to have largely universal agreement is that nonmedical use of diagnostic US should be discouraged. The AIUM has published a statement that this is "contrary to responsible medical practice." However, the definition of "nonmedical" application is somewhat less certain. The scanning of live models to display equipment on exhibit areas may be considered "nonmedical." In fact, the BMUS has published guidelines with quite restrictive output limits to be applied for various "nondiagnostic" purposes. Although this safety issue remains debatable, the ASUM maintains a conservative unambiguous policy that prohibits scanning of live models in the exhibition area at scientific meetings. Issues such as biosafety, ethics and medicolegal implications require careful consideration by US organizations and professional conference organisers.