Right Middle Lobe – Evaluate
The pathological process can be localized in the right middle lobe, when the right heart border interface is lost (“Silhouette” sign).
Study Smarter
The pathological process can be localized in the right middle lobe, when the right heart border interface is lost (“Silhouette” sign).
The pathological process can be localized in the right lower lobe when the right hemidiaphragm interface is lost (“Silhouette” sign).
The pathological process can be localized in the lingula when the left heart border interface is lost (“Silhouette” sign).
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The pathological process can be localized in the left lower lobe when the left hemidiaphragm interface is lost (“Silhouette” sign).
Compare Tissue Attenuation
On x-rays because air is less dense and therefore shows up radiolucent (black), increasing amounts of soft tissue or less air shows up more radio-opaque or white. Similarly a “line” on an x-ray signifies air is present on both sides of the line, while an “interface” describes a separation of structures of differing densities.
2. Evaluate for Pneumothorax – Sulcus Sign
Left Image: Depicts the deep sulcus sign.
Right Image: Lateral decubitis view of the pneumothorax. The pleural air will rise above the lung in this view.