What is seen here?
Large homogeneous density of a mass/LN
Angiography of the chest shows what vessels?
Contrast studies help diagnose vascular diseases such as pulmonary embolism
- A 41 yo presents with dyspnea for 3 weeks-
- On physical exam there are decreased breath sound, decreased tactile fremitus, and dullness to percussion on the right lower lung field
- Chest x-ray show increased radiographic density and obliterated costophrenic angle.
- You suspect pleural effusion.
- What radiographic test would you order next to confirm the diagnosis?
Pleural diseases, pneumothorax and pleural effusion are better assessed by decubitus films
- For a pneumothorax: air rises when lying on unaffected side, fluid layers when lying on the affected side
How does pneumothorax affect absorption of X-ray photons and what is the resulting effect on the X ray density on the affected side?
Air rises when lying on unaffected side, fluid layers when lying on the affected side
Name 3 respiratory conditions associated with increased and 3 associated with decreased radiographic density.
Increased radiographic density:
- Alveolar filling
- Atalectasis/volume loss
- Interstitial infiltrates
Decreased radiographic density:
- Air trapping: asthma, emphysema, foreign body
- Loss of soft tissue