Abstract
CT scanning has been recognised as a high radiation dose modality, when compared to other diagnostic X-ray techniques, since its launch into clinical practice > 30 years ago. Over that time, as scanner technology has developed and its use has become more widespread, concerns over patient radiation doses from CT have grown.[1, 2] The introduction of multi-slice scanners has focussed further attention on this issue, and it is generally believed that it will lead to higher patient doses.[3] The amount of radiation dose a patient receives from a CT scan depends upon two key factors, the design of the scanner and also on the way that the scanner is used. The designs of single-slice and multi-slice scanners are similar in most aspects that affect radiation dose, but multi-slice scanning can potentially result in higher radiation risk to the patient due to increased capabilities allowing long scan lengths at high tube currents.
Published Version
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