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Pulmonary emphysema, CT scan

Pulmonary emphysema, CT scan

C021/2972

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Credit

MICHEL BRAUNER / ISM / SCIENCE PHOTO LIBRARY MICHEL BRAUNER / ISM / SCIENCE PHOTO LIBRARY

Caption

Pulmonary emphysema. Coloured frontal computed tomography (CT) scan of a male patient's chest showing severe emphysema in the left lung (right). There is a large area of trapped air (dark blue) in the affected lung. Emphysema causes the tiny air sacs of the lungs to become damaged, leading to the walls between them breaking down. This causes large areas of trapped air and leads to a smaller surface area for gaseous exchange, restricting oxygen uptake by the blood. Enlarged air spaces bigger than 1 centimetre in diameter are known as bullae. Lung tissue in bullae may be completely destroyed. The main cause of emphysema is cigarette smoking. Symptoms include a cough and shortness of breath. Bullae may be surgically removed although there is no cure for emphysema.

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