Fastening combination having special utility in affixing an X-ra
Fiducial marker
Fiducial marker for correlating images
Film cassette having marker for identifying the exposure side of
Film cassette having marker for identifying the exposure side of
Film cassette having marker for identifying the exposure side of
Film cassette having markers for identifying and differentiating
Film markers for specifying body postures of animal photographed
Fluoroscopy orientation device