CHEST POSITIONING

PROJECTION VOLTAGE INDICATIONS CENTRAL RAY/POINT

Evaluation criteria of a good image

PA CHEST (Erect) 110-125 Kv - pleural effusion , pneumothroax , atelactasis or signs of infection

IR 2 inches above the shoulders .CR: 18 cm (female ) and 20 cm (in male) from verte-bral prominent (T1)

Ten posterior ribs are visible above the di-aphragm.

PA CHEST (Sit-ting)

110-125 Kv same as above

AP CHEST (supine)

110-125 Kv -pathology involv-ing the diaphragm & mediastinum or pleural effusion.

CR: T7 which is 8-10 cm from the jugular notch. IR : 4-5 cm above the shoulders .

AP CHEST (lor-dotic view)

110-125 Kv - to R/O calcifica-tions or masses beneath the clavi-cle.

CR : 9 cm be-low the jugular notch. patient stands 1 feet away from the IR & leaning back-ward.IR is placed 7-8 cm above the shoulders.

Lateral Chest (erect)

110-125 Kv -pathology poste-rior to the heart , great vessels and sternum.

CR: 8-10 cm from the jugular notch.

all lung fields from apices to costophrenic angles should be visualized .the arms should not be superimposed over portions of the lung field .Sharp radiographic outlines.No tilt: thoracic interverte-bral spaces and foramina are open.

Lateral chest ( sit-ting)

110-125 Kv same as above. same as above.

CHEST POSITIONING

AP Lateral de-cubitus(cross table lateral chest)

110-125 Kv small pleural effusions , air-fluid levels in the pleural space - possible pneu-mothorax.

affected side should be against the grid . CR : as above.

R/L anterior oblique

110-125 Kv Pathology in the lung fields , tra-chea , mediastinal structures \contour of the heart & great vessels

R/L posterior Oblique

110-125 Kv same as above

CHEST POSITIONING