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A simple guide_to_cxr_interpretation

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A basic diagrammatic guide to CXR interpretation

A basic diagrammatic guide to CXR interpretation

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    A simple guide_to_cxr_interpretation A simple guide_to_cxr_interpretation Presentation Transcript

    • A Simple Guide to CXR Interpretation If you’re struggling to see or differentiate the abnormal appearances on the radiographs, take a look at these diagrams.
    • Pneumothorax Air in the pleural cavity Tension Pneumothorax A complicated pneumothorax where air enters the pleural cavity but cannot escape due to the formation of a one-way valve at the rupture point. Pressure builds Lung detached and collapsed Black, empty space Black, empty space Mediastinal shift
    • COAD / Emphysema Break-down of lung tissue with subsequent loss of alveolar surface area The lungs then become hyperinflated to accommodate the lost surface area Insp and Exp become completely reliant on the thoracic cage and abdo muscles Over-inflated lungs Heart appears Long and thin Flattened diaphragms
    • Subcutaneous emphysema Air in subcutaneous layer of skin Lucent stripes across soft tissue Lucent gas collections in soft tissue Evidence of cause: Chest drain
    • Patchy densities in lungs Pulmonary oedema – fluid accumulation in lungs Fluid in alveoli – white Air still retained in bronchioles – black Overall – a patchy/fluffy effect
    • Pleural effusion Excess fluid in pleural cavity Dense white lung Meniscus sign Horizontal fluid level Blunted costophrenic angle
    • Cardiomegaly (heart enlargement) Max diameter of heart exceeds half thoracic Diameter (in adults) Cardio:thoracic ratio
    • Atelectasis – alveolar collapse Think of a sponge with the air squeezed out – this is sort of what’s happened in the lobes of the lung Right Upper Lobe Collapse Elevated horizontal fissure Triangular density in right apex Right Middle Lobe Collapse Lowered horizontal fissure Density in middle region with loss of contrast between the lung and the Right heart border Right Lower Lobe Collapse Loss of right costophrenic angle
    • Left Upper Lobe Collapse A slight increase in density over the left lung (veil sign) Left Lower Lobe Collapse Loss of left costophrenic angle A sharp white line behind the heart (sail sign) Atelectasis
    • Left Upper Lobe Collapse A slight increase in density over the left lung (veil sign) Left Lower Lobe Collapse Loss of left costophrenic angle A sharp white line behind the heart (sail sign) Atelectasis