As to coming up with a national benchmark, there are hundreds of diagnostic procedures—MRIs, CT scans, PET scanning, X-rays, nuclear medicine. What's needed is to come together with the provinces and territories to talk about establishing benchmarks that can be used throughout the country, though some could perhaps be customized for particular areas. Other jurisdictions like the United Kingdom and the Netherlands have done this, but it requires that people come together and hammer out the details.
On May 6th, 2008. See this statement in context.