First, let's get a bit of the jargon down. The playing surface in curling is called the sheet. Sheet dimensions can vary, but they're usually around 150 feet long by about 15 feet wide. The sheet is covered with tiny droplets of water that become ice and cause the stones to curl, or deviate from a straight path.
RE: FDG Uptake Explanation - PET SCAN. uptake is the amount of radioactive sugar that the cells are using for metabolism. It is possible to have a positive area on PET that is not cancer. Thats why its important to compare one scan to the next to see if there are changes.
However, the scans are not very specific. This means that it frequently will detect things that are not cancer. A recent infection or injury may show up on PET. This means that when a PET Scan does not show uptake (meaning it is not hot) there is unlikely to be cancer. However, when a PET Scan detects uptake of the FDG tracer, it means that it might be cancer, but is not definite. Like most new technologies, PET Scans are very expensive, often costing thousands of dollars.