How do you incorporate surveillance imaging for patients with ovarian cancer on maintenance therapy?

I typically follow the NCCN guidelines for monitoring/follow up:

• Visit every 3 months for 2 years, then every 3-6 months for 3 years, then yearly after year 5.
• CA125 (or other tumor markers) at each visit if initially elevated (with the understanding that CA125 monitoring does not affect survival, ...