Should i request a pet scan? for the past seven months i have had a sharp, aching pain in my shin right on the bone near my knee that has progressively gotten worse.

See answer: Have your dr carefully evaluate you. After plain radiographs an MRI might be an appropriate diagnostic exam but not a pet scan.

Maybe MRI: I can't examine you but , do you play any sports ? To you jump alot ? The little bump/bone of the top of your shin is your tibia tubercle and becomes swollen/irratated from this type of movement.

Xrays, maybe MRI...: Start with a visit to your primary care provider. X-rays of the lower leg may be appropriate, depending on the history and physical exam findings. A sports medicine or orthopedics consult may also be useful. If more imaging is necessary, an mri, or possibly a bone scan or ct would be more appropriate than pet.