- Density
- In dependent portion
- Costophrenic angle in PA view
- Anterior and posterior portions of gutter in lateral view
- Along sides in lateral decubitus position
- Along posteriorly in supine position, giving diffuse haziness on the side of
effusion
- Silhouette of upper limit of density
- Upper
margin high in axilla in PA view
- Upper margin high interiorly and posteriorly in lateral view
- Blunting of costophrenic angle
- Lack of identifiable diaphragm (silhouette sign principle).
|
- Massive
- Unilateral VS bilateral
- Sub pulmonic
- Loculated
- Supine position
- Lateral decubitus position
|