Journal Of The American Medical Association……..”….unnecessary diagnostic imaging remains a substantial problem in the United States.””The United States occupies top usage ranks, with population rates of annual computed tomography (CT) scans (245 per 1000 people) and magnetic resonance imaging (MRI) scans (118 per 1000 people) that are 5 and 3 times higher than those of Finland, respectively.”.

https://jamanetwork.com/journals/jama/article-abstract/2720430