When a foreign body is suspected but not identified and removed during visual inspection, consider radiographic imaging for further evaluation. Most foreign bodies can be seen on plain radiographs, although CT scan, ultrasound, or MRI may be indicated in some circumstances (Table 14-1). Use an underpenetrated soft tissue plain radiography technique or adjust the contrast and brightness when using a digital system to increase the likelihood of identifying a foreign body. CT scan is capable of detecting more types of materials than plain film radiography, and may be useful for thorns, spines, wood splinters, or plastic foreign bodies. Ultrasound can be useful at the bedside for directing exploration and removal of foreign bodies. It is >90% sensitive for detecting foreign bodies larger than 4 to 5 mm taking into account the composition of the foreign body, proximity to echogenic structures, and operator experience. MRI is more accurate than the other modalities for identifying wood, plastic, spines, and thorns, but is often less available for emergency use.