Estimating the Radiation Risk from CT: Which Approach Seems Best?

February 1, 2007 | Evaluations & Guidance


It is well known that radiation causes two types of effect: deterministic and stochastic. Deterministic effects are predictable and will occur above specific thresholds—radiation burns are one example. While these effects are a problem in diagnostic radiology, they are not usually a concern in CT. On the other hand, stochastic effects, such as cancer induction, are not predictable and are the main concern at the dose levels encountered in CT.

Putting an actuarial value on the risk attached to a dose of radiation is a difficult and controversial proposition. Four of the...

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