"Doctors Under Pressure to Meet Quotas and Fill Hospital Beds" [1].
"Once hospitals have made such a huge investment, experts like Dr. Zietman say, doctors will be under pressure to guide patients toward proton therapy when a less costly alternative might suffice." [2]
"While payments vary widely, doctors often collect $500 to $700 for a typical M.R.I. done on an outpatient basis in this area." [3]
[1] https://www.thehealthlawfirm.com/blog/posts/doctors-under-pr...
[2] https://www.nytimes.com/2007/12/26/business/26proton.html
[3] https://www.nytimes.com/2004/03/13/business/an-mri-machine-f...