Modality	Foreign body types detected	Relative cost*	Availability†	Radiation exposure‡	Advantages	Disadvantages
Computed tomography	Radiopaque (e.g., glass, metal)	$$	++	High	Three-dimensional, quick, detects objects near bone	High radiation exposure
Fluoroscopy	Radiopaque	$	+	Low	Real-time images, portable	Limited number of trained physicians
Magnetic resonance imaging	Radiolucent (e.g., wood, vegetation)	$$$	+	None	Can be used for chronic or complex foreign bodies	Dangerous if metal is present, time consuming
Radiography	Radiopaque	$	+++	Low	Easy to interpret, quick	May not detect vegetative foreign bodies or objects behind or in bone
Ultrasonography	Radiolucent	$	+++	None	Real-time images, portable	Operator dependent