Chest Xray Special projections 1 AP supine or

Chest X-ray • Special projections: 1 -AP supine or semi erect 2 - Lateral decubitus 3 - A P lordatic 4 - Anterior oblique 5 - Posterior "oblique”

1 - AP supine or semi erect projections: • Technical factor 70 -80 kvp used with portable machine 80 - 100 kvp used with grid • Central ray: CR: angled cauded to long axis Of sternum ( 5 ) SID: 40 inches for supine 72 inches for semi erect

2 - Lateral decubitus Ap Projection: Use to demonstrate air fluid levels, Plellral effusion. • Technical factor • IR: size 35*43 cm • Use marker • Patient Position: Patient lying on right or left side Patient arm' s above head

3 -AP lordatic Projection: Use to demonstrate masses beneath the Clavicles Patient position: – Patient standing 1 foot away from IR and- Leaning back with shoulder, neck and back of head against IR. Central ray: – CR: perpendecular to IR centered to mid – Sternum – SID: 72 inches Notes: – If patient is note able to stand Use AP semi axial or supine. – CR: ( 15 -20 ) cephalic to the mid sternum.

4 -Anterior oblique (RAO-LAO) projections: Patient position: Patient erect, rotated 45 LA shoulder against IR for LAO RA shoulder against IR for RAO Patient hand on hip and opposite hand on Head Notes: For anterior oblique the side of interest is Generally the side farthest from IR Ex. RAO best visualize the L lung LAO use for heart.

5 -Posterier oblique: (RPO-LPO) projections: • Patient position: • Patient erect rotated 45 • Notes: • Posterior oblique best visualize the side