There is no National Entrance cum Eligibility Test or NEET in Canada as it is an exam to take admission into the Indian medical colleges. But to become a Radiologist in Canada, you'll have to give MCAT of Medical College Admission Test, which is a standardized MCQ format examination.

After you qualify this and get your degree, then you'll have to give a licence exam for obtaining your practitioners' licence. Hope I have answered your question. All the best!