Radiological Manifestations of Pneumonia

• Encountered with pneumococcus, mycoplasma and legionella pneumonia
• Segmental, lobar or multilobar air space inflammation
• Lung abscess is rare.
• Empyema is rare.
• Most resolve completely with no residual changes.
• Radioligically indistinguishable from mycoplasma and legionella pneumonia

Necrotizing Pneumonia:

• Encountered with anaerobes, staphylococcus, pseudomonas, klebsiella and E coli
• Rapidly progressive necrotizing bronchopneumonia
• Indistinguishable radiologically
• Clinical setting and cultures help in diagnosis
• Empyema is common.

Diffuse Bilateral Alveolar Pneumonia:

• Encountered with influenza, pneumocystis, CMV, mycoplasma and legionella infections

Diffuse Interstitial Pneumonia:

• Mostly viral infections - chicken pox

Segmental Pneumonia:

• Encountered with aspiration and post obstructive pneumonia

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