Специально погуглила  Exhibit 2.1 provides measures of a jurisdiction’s investment and efficient use of CT and MRI scanning. Canada ranked 18th in CT scanners per population among the 25 Organization for Economic Co-operation and Development (OECD) nations (10.4 CT machines per million population compared to a median of 14 CT machines per million population among OECD nations). Ontario had the fewest CT machines of any Canadian province or territory in 2003. Canada ranked 14thamong the 26 OECD nations with available data on MRI scanners (4.6 MRI machines per million population in 2003, compared to a median of 5.4 MRI machines per million population among OECD nations). Ontario had fewer MRI machines than the Canadian average. Manitoba had fewer MRI machines thanOntario in 2003. 15 In 2004/05, Canada performed nearly four times the number of CT exams per capita and two times the number of MRI exams per capita 15 than Sweden or the United Kingdom (UK) performed in 2002 30 (Exhibit 2.1). Ontario performed fewer CT exams than other provinces but more MRI exams than British Columbia (BC) and Quebec.Alberta performed substantially more MRI scans than other Canadian provinces. Utilization of CT scanning in the US elderly population was 45% higher than in Ontario.3,4The number of CT and MRI exams per capita is roughly proportional to the number of scanners per capita across jurisdictions (Exhibits 2.2 and 2.3). However, there remains considerable variation in the relationship between thenumber of exams per capita and the number of scanners per capita as measured by patient throughput. Exhibits 2.2and 2.3 suggest that countries with more machines are more likely to have times when the machines are idle(excess capacity), while countries with fewer scanners may be utilizing their equipment more efficiently. That is, at some points along the curve, the number of exams per capita appears to remain constant or even fall despitean increase in the number of machineshttp://www.ices.on.ca/flip-publication/diagnostic-services-in-ontario/files/assets/basic-html/page48.html