Mr. Chair, there's consensus in the medical community that Tc-99m is the best there is, and there is no single alternative isotope to Tc-99m.
For cardiac, we have all been working on this issue since December 2007 in the medical community and with the provinces and territories. They have come to the consensus that thallium is a viable alternative for cardiac imaging. It can be used. It's approved. It requires the same cameras as they use with Tc-99m. They're coping by using those. That's part of their contingency planning, to use that as an alternative. It's not perfect, but it is a very viable alternative for the short term.