What are the CT imaging findings of pulmonary infection?

Feb 14, 2023 Source: Cainiu Health

Dr. Guo Xiheng

Introduction

CT imaging findings of pulmonary infections require analysis based on the specific disease. In lobar pneumonia, ground-glass opacities with slightly increased density are observed, with relatively indistinct margins. In bronchopneumonia (lobular pneumonia), scattered patchy shadows are distributed along the bronchial pathways in the middle and lower lung fields, also with indistinct margins. In interstitial pneumonia, bilateral thickening of the bronchovascular bundles is present, accompanied by ground-glass opacities.

Lung infection CT findings need to be analyzed according to the specific disease. Common conditions include lobar pneumonia, bronchopneumonia (lobular pneumonia), and interstitial pneumonia.

1. Lobar Pneumonia

Lobar pneumonia may appear as ground-glass opacities with slightly increased density and poorly defined margins. As the disease progresses, it may develop into a uniformly dense consolidation with fibrous density, distributed in an entire lobe or lung segment. Air bronchograms may be visible within the affected area.

2. Bronchopneumonia (Lobular Pneumonia)

Bronchopneumonia typically presents as scattered patchy shadows distributed along the airways, primarily in the middle and lower lung fields. These lesions usually have indistinct margins and may show areas of continuous high density or cloud-like increased opacity.

3. Interstitial Pneumonia

Interstitial pneumonia may manifest as bilateral thickening of the bronchovascular bundles, accompanied by ground-glass opacities. As the disease progresses, findings may include thickened interlobular septa, small nodular shadows, and honeycombing changes in the lungs.

In addition, other types of pneumonia may also present as multiple fine shadows in the lungs, which require careful differentiation.

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