New PET scan warning -- to stay warm?

And yet, the subtle changes in SUV in my liver did turn out to represent progression, though the radiologist and my onc would not call it until it reached a certain level. We watched it slowly rise over the course of several scans. It seems reasonable to expect that an effort to be consistent with pre-scan diet, refraining from exercise, and staying warm would help ensure accuracy. And it must also be important for the techs to time the injection well and consistently (don't be late), and the radiologist and oncologist to interpret the scan well. Notice the word interpret. Someone once said to me something to the effect that when it comes to biological processes, things are often not simple yes-no, black or white. This fits with Zarovka's caution about how we think about scans.

Yes, I don't mean my post to scare people, but to show that often one scan is inconclusive. I agree with your advice, which I think is saying not to panic over a scan that shows a small change. It could just be a different "slice" on the imaging or something. Scans need expert interpretation and sometimes waiting to see what consecutive scans show. In my case, no decisions were made based on just one or two scans. I look at the waiting and watching period I had as getting a longer time out of a treatment which must have been partly working still. And yes, I knew exactly when things started waking up. By the way, in my case, ILC has been visible on all imaging, which isn't true for everyone.