How is ongoing monitoring done? PET, CT, MRI...??

I have just had part of my annual checkup.I had a physical examination by my surgeon,and a mammogram on my one breast and an ultrasound.I have my oncology appointment in 2 weeks,and I am pretty sure it involves a blood test.My son is a nurse,and he tells me they can tell a lot from blood tests.Apart from that,our own diligence in taking notice of subtle changes in our bodies,and reporting them to the doctor,is also very important.CheersxoxRobyn