JAMES KING-HOLMES / SCIENCE PHOTO LIBRARY JAMES KING-HOLMES / SCIENCE PHOTO LIBRARY
Capsule endoscope. Professor Paul Swain holding a capsule endoscope. Once swallowed, the camera in this pill provides video images of the stomach and intestines, allowing disorders such as ulcers to be found. An endoscope is a device for viewing the inside of the body. The capsule, measuring just 11 by 30 millimetres, has a light source and a radio transmitter. The pill causes no sensation after it has been swallowed, and the patient can carry on life as normal. Over a day, the pill moves through the digestive system, sending images to a receiver worn by the patient. The images are then download- ed for analysis. Swain and his colleagues develop- ed the camera at the Royal London Hospital, UK.
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