Both systems have pros and cons, like anything else.
Perhaps have a read here.
http://www.csqi.on.ca/cms/one.aspx?p....U9fvQvldVS E
PET scans only started to be covered by OHIP in 2009, so there's likely some lag there.
Wait times are typically less than 2 weeks (10 business days) at each PET/CT centre (Figure 4)
The median wait time across all centres from April 2010 to December 2012 is 5 business days.
The PET/CT centres reporting the maximum wait times vary from month to month, i.e., there are no consistent outliers. <--- there aren't any "bad" facilities that are consistently behind
So should we double our investment in these machines to cut the median wait time down to 2-3 days?
A 2004 survey of 14 members of the International Networks of Agencies for Health Technology Assessment (INAHTA) identified the number of PET scanners per million ranging from 0.25 in the Netherlands to 1.26 in Belgium, with Australia at 0.65, the United States at 0.83 and Canada at 0.39. <--- old data but interesting