A plane that divides the
midsagittal plane
body into right and left
halves along its vertical axis
milliamperage (mA)
The number of electrons flowing from the cathode end of
the X-ray tube to the anode end of the X-ray tube,
measured in thousandths of ampere. Primarily controls the
quantity of the X-ray beam.
The millamperage and exposure time (measured in
milliamperage and
seconds).
seconds (mAs)
N
nasion
Depression at the bridge of the nose.
Position in which the patient's head and nose make
nose-forehead position
contact with the tabletop or the upright Bucky, as for the
PA mandible.
O
oblique
Position in which the body is angled between a lateral and
an AP or PA position. (See also lateral oblique, left anterior
oblique (LAO), LPO, RAO, and RPO.)
Same as the acanthiomeatal line. Line that connects the
occlusal plane
acanthion and the external auditory meatus (EAM), the
opening of ear or the lower margin of the upper teeth even
with the base of the skull
MD0962
A-7