I remember when my mother was dying of leukemia and had pneumonia, and I asked them to give her a transfusion for her low hemoglobin because we pediatricians always transfused kids with packed red cells if they had a low hemoglobin and difficulty breathing to deliver more oxygen to the tissues. The doctor tried to convince me that giving a trnasfusion is like doing an organ transplant. It's amazing what doctors will say (overstate) to make their point. You'd think he thought he was talking to an idiot rather than a colleague.
All radiation is cumulative over a lifetime. Therfore care should be taken not to do unnecessary x-rays. CT scans cause significantly more radiation exposure than simple x-rays. Still, a single CT scan done for a good reason hardly puts the patient at significant risk. You don't even have to sign a consent like you do for surgery. That should put the risk in perspective.
To avoid unnecessary risk and medical expense, procedures should only be done when there is a good reason, but overstating the risk does not help the patient understand and make informed decisions. Shame on your doctor.
I'm not sure that a CT is necessary. If it is low grade and non-invasive you shouldn't need a CT; however, without a proper biopsy for staging and grading your doctor would need a crystal ball to give you treatment recommendations. That's why everyone here is suggesting a re-TURB (for you an initial TURB ) and a second opinion.
-Warren
TaG3 + CIS 12/2000. TURB + Mitomycin C (No BCG)
Urethral stricture, urethroplasty 10/2009
CIS 11/2010 treated with BCG. CIS 5/2012 treated with BCG/interferon
T1G3 1/2013. Radical Cystectomy 3/5/2013, No invasive cancer. CIS in right ureter.
Incontinent. AUS implant 2/2014. AUS explant 5/2014
Pediatrician