Early monitoring of external radiation therapy by [18F]-fluoromethylcholine positron emission tomography and 3-T proton magnetic resonance spectroscopy: an experimental study in a rodent rhabdomyosarcoma model

Opposite trend between increased FCH uptake and decreased tCho peak was observed at 3 days. Later (9 and 16 days), uptake remained stable and tCho peak reincreased.