<unk>  ray is a very easy and cost effective investigation while evaluating fever of unknown origin after laboratory investigations are done, the next best investigation of choice is<unk>  ray which may be helpful in some cases finding out cause of FUO.
Fever of unknown origin x ray
Fever of unknown origin CT scan
Fever of unknown origin MRI
Fever of unknown origin physical examination
Q fever other chest x ray
Fever of unknown origin other imaging findings
Increased bowel sounds x ray
Fever of unknown origin surgery