Thanks so much for your reply. I'm sorry to hear that things didn't work out for your mother, but appreciate your honesty about her experience with the chemo. I don't expect it to be an easy road ahead, but want to be as informed as possible, given the circumstances.
I spoke to my dad's doctor yesterday and he agrees that getting a CAT scan is the way to go. He said that my dad's MRI taken on March 30 (his surgery was on April 20) showed no visible tumors, so this will be the baseline. It's been about 3 months now, so it should give us an idea of what's going on in his liver. He also told me that the surgeon did not remove all the spots he saw on my dad's liver (the report said "numerous spots on the liver"), but they were small. I guess he only biopsied 4 of them and 2 (both in the same segment of his liver) came back as malignant.
My dad had a tough time recovering from the surgery and from this experience I've learned he has a pretty low tolerance for pain. And right now he's feeling so good, I know he's nervous about chemo and feeling bad again. So, I'm praying that nothing significant will show up on the scan.
This doctor has been so wonderful, he spent almost 30 minutes on the telephone with me discussing my dad's case. He also felt that chemo was not necessarily the best course of action right now, and waiting was definitely a reasonable option. Of course, he also said there are no right or wrong decisions and that it's up to my dad to decide what he wants to do.
My mom will call on Monday to schedule the scan. I will update once we get the results.
Thanks again to everyone for their replies and support,