http://www.cic.gc.ca/english/information/medical/medexams-perm.asp
Medical Report Procedures
Medical reports and x-rays for the medical examination become the property of the Canadian Immigration Medical Authorities and cannot be returned to you.
The doctor will not tell you the results of the medical examination. The doctor will let you know if you have a health-related problem.
The designated medical practioner does not make the final decision. Citizenship and Immigration Canada will make the final decision on whether or not you have passed your medical examination for immigration purposes.
The visa office will tell you in writing if there is a problem with your medical examination.