The hi-tech transparent device is about the size of a large multivitamin pill. It contains a rapidly rotating laser that shines a beam of near-infrared light on to the wall of the oesophagus, or gullet, the pipe that carries food to the stomach.
A swallowable camera-in-a-capsule could help doctors spot early signs of oesophageal cancer, research has shown.
The hi-tech transparent device is about the size of a large multivitamin pill. It contains a rapidly rotating laser that shines a beam of near-infrared light on to the wall of the oesophagus, or gullet, the pipe that carries food to the stomach.
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