"Only ~10% of x-rays ordered to investigate retained foreign bodies are positive (reflecting the low incidence post-injury). Still, x-rays are excellent at detecting radiopaque foreign bodies, with ~85% being detected 6:"
"All glass is visible on CT and usually easier to see than on plain radiography 9. Density varies between 500-1900 HU. Dense fragments as small as 0.01 mm3 can be detected 10."
Expected headings
"Signal characteristics"