Each point in each slice of a CT scan is essentially a separate test, and the chance that a whole body CT scan is going to turn up something somewhere that looks funny is nearly 100%.

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But the fact that centers were able to use at least one radiation-reduction technique in most patients "should serve as a wake-up call to cardiac CT laboratories that do not routinely use these methods, " Einstein writes in his editorial.

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He seemed to have developed an infection, but our X-rays and CT scans failed to turn up a source.

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King's College London, will be exhibiting a device that uses ultrasound technology to build up a 3D image before surgery, cutting out the need for a CT scan.

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CT, which stands for computed tomography, builds up a more revealing picture than a simple x-ray by taking a series of cross-section pictures.

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Dr Zhou has set up a joint venture with Siemens, a German company that builds CT scanners, to develop his technology for diagnostic imaging.

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In early December, I woke up on Saturday morning (I was a management employee of a major university in New Haven, CT working at the medical school in one of the most vibrant departments) with horrible pain in my left cheek bone.

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