S-I
Sacro-iliac joint.
SMV
Acronym for submentovertex.
SMV projection
Projection in which the CR enters beneath the mandible
and exits the vertex of the skull to the center of the film.
source to image
Distance in inches between the X-ray tube focal spot and
receptor distance (SID)
the film. Also referred to as the anode-film distance and the
focal spot-film distance
subluxation
An incomplete or partial dislocation.
supercilliary arch
The ridge or arch of the bone extending across the
forehead directly above each eye
supine
Lying on back; as in the AP supine abdomen.
suspended expiration
The patient is instructed to take a deep breath and blow it
all the way out and stop breathing; as in the thoracic spine
suspended inspiration
The patient is instructed to take a deep breath and hold it.
suspended respiration
The patient is instructed to stop breathing.
T
The central ray (CR) and source to image receptor
table factors
distance (SID).
tangential projection
A projection in which the CR merely skims the body part to
project it away from the other body parts.
The cartilaginous
tragus
projection anterior to the
external opening of the
ear.
MD0962
A-10