Clinical indication:

Lower-lobe lung disease, pleural effusions, and anterior mediastinal masses.

Region:

Lungs, trachea, bronchus, mediastinum, costophrenic angle

Patient’s Position:

The patient may sit erect or stand straight with the chin up and their left side against the film image receptor.

A left lateral projection should be performed (because it gives more anatomical details) unless a right lateral projection is specifically requested by the physician.

Tell the patient to raise both arms above the head to prevent their superimposition on the chest field.

Make sure the patient is not leaning sideways, forward or backward

Cassette:

Size: 14’’x17’’ Orientation: Portrait

FFD/SID:

100cm

Central ray:

Central ray towards the center of the chest with height of 7^th thoracic

Grid:

Yes

Respiration:

Suspended with deep inspiration

Exposure factors:

60-80kVp 16-20mAs

Collimation:

Superiorly to above the shoulders, inferiorly to the 12^th rib and laterally include skin margins