Reception still fuzzy for fast CT scans of the heart

As technology for seeing into the heart improves, how the machines will be used is still up in the air.

Machines that peer into the body, such as the familiar x-ray and the alphabet soup of CT, MRI, PET, and SPECT scanners, can make incredibly detailed pictures of tissues that sit still when you do. Their renderings of the ever-beating heart, though, come out blurry. It's akin to what happens when you try to photograph a fast-moving grandchild in low light with a slow camera.

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