Critics of cardiac CT angiography question whether its benefits warrant its current widespread use and the amount of radiation exposure.

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In the current New England Journal Study, coronary CT scans were used as a triage tool to screen low to intermediate risk patients who presented to the emergency department with chest pain.

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The method, still somewhat controversial, involves guiding a specialized needle into a tumor using precise ultrasound or CT imaging, then hitting it with roughly one ampere of radio current, just enough to fry it.

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The current king of the hedge fund industry, Ray Dalio, can be found in Westport Ct.

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"Something like 2% of cancers down the road will come from CT scans now, " says Columbia University radiation biologist Eric Hall, who was not involved in the current study.

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Caught in the middle is GE's medical division, the old home of current chief Jeffrey Immelt and the biggest seller of X-ray, MRI, ultrasound and CT-scanning equipment in the world.

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