JAMES KING-HOLMES / SCIENCE PHOTO LIBRARY JAMES KING-HOLMES / SCIENCE PHOTO LIBRARY
Computerised dental X-ray. Dental radiographer prepares patient for an X-ray produced by computed dental radiography (CDR). CDR is a new (in 1997) X-ray technique using little radiation, needing no film and allowing images to be seen almost instantaneously. The patient has a sensor in her mouth wrapped in a sterile covering. This is attached to a microprocessor by a thin cable. When the patient is ready, the radio- grapher will hold the X-ray emitting tube (at left) close to the patient's face. An X-ray image of the patient's teeth will appear on the monitor (in background). The images can be adjusted or coloured to aid the diagnosis of dental problems.
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