JOHN GREIM / SCIENCE PHOTO LIBRARY JOHN GREIM / SCIENCE PHOTO LIBRARY
Lungs and heart. Coloured Computed Tomography (CT) scan through the chest of a patient in front view, showing healthy lungs and heart. The lungs (green) are seen within the ribcage; lungs appear speckled here revealing their bronchial airways. The heart (at lower centre, pink/blue) is positioned between the lungs and lies partly inside the lung field at right. The diaphragm which separates the chest (thorax) from the abdomen is seen at lower frame. Spine bones run from the neck (at top) down the middle of the image. A CT scan is made using X- rays to produce "slice" images through the body.
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