Download Lecture (3)

Lecture (3)
• Erect Positions
Surface of body closest to the film used to give a more specific
description
Examples:
Posterior erect -- patient is standing with the posterior surface
of the body next to the cassette
Left lateral erect -- patient is standing with the left side of the
body next to the cassette
• Recumbent Positions
Supine
: (posterior recumbent position) – Lying down on the back
Prone (anterior recumbent position) Lying face down
• Right lateral recumbent
side
lying down on the right
• Oblique (Erect or
Recumbent)
• Position when the body is
rotated so that the medial
sagittal plane (MSP) is
neither nor to the film
but at an angle
• Exact position is
indicated by the surface
closest to the film and the
angle of rotation May be
erect or recumbent
• Abbreviations:
(RPO,LPO, RAO, LAO)
45 degrees RPO
Decubitus Positions
• Ventral decubitus
:
patient is prone & a horizontal
beam is used
Dorsal decubitus :
patient is supine & a horizontal beam is used
• Left lateral decubitus :
• patient lying on the left lateral side & a horizontal
beam is used
PROJECTION
• Refers to the path the beam takes through part
Anteroposterior projection (AP)
Beam enters the front surface and exits the back surface of the part
AP projection in supine position
Posteroanterior projection (PA)
Beam enters the back and exits the front of the part
PA projection in prone position
Special Projections (Position)
• Axial
• projection that includes an
angulation of the beam
usually to the long axis of
the body part.
Tangential
projection obtained when the central ray
touches only along the edge of a curved
body part
AP axial with 40°
caudal angle