08/06/2026
Most people assume the CT scan tells their team everything they need.
It doesn’t.
A CT shows where the cancer is. A PET scan shows whether it’s active, spreading, essentially how it’s behaving.
It works by tracking sugar. Cancer cells are far hungrier than healthy tissue, so they consume more and light up on the scan.
What the process looks like:
1. An injection of radioactive sugar, then an hour of rest while it moves through your body.
2. Around 30 minutes lying still in the scanner.
No pain. Nothing enclosed.
What your team learns from it changes everything about treatment planning.
Whether the cancer has reached lymph nodes or other organs.
Whether it’s behaving slowly or quickly.
Whether treatment needs to stay local or work across your whole body.
The best result is a scan that only lights up where you already knew the cancer was.
After this, the next step is usually a brain scan, because the PET doesn’t image that area reliably enough on its own.
Any questions about what this means for you or a loved one, send me a DM or an email.