Fact: Though it is true that certain imaging methods like X-ray,
CT scan, Catheterisation and mammography involves radiation,
but other methods like Ultrasound and MRI scans are radiation free.
If between the query and the performance of the test they
have made you a digital rectal examination or a Catheterisation will have to remind you that you tell the doctor to collect the results,
since these tests can alter PSA levels in blood.