Does anyone know what the imaging protocol is for renal cell carcinoma?

[Thesummeriwas16]

I had a renal cell carcinoma 3 1/2 years ago and had the affected kidney removed. Since then I have been having yearly surveillance CT's.

I transferred my care to a more local smaller hospital a year ago and last year had a CT as usual. This year I have received an appointment for a ultrasound of my urinary tract. Is this the correct protocol - I thought I would be having surveillance CT's for 5 years?

It jumps to 5 years, after 3 years of annual CT scans, according to cancer U.K. info.
www.cancerresearchuk.org/about-cancer/kidney-cancer/treatment/follow-up

Thank you so much @Appianterri! :-)