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Radiation Dose Reduction in Chest CT: A Review

¹ Department of Radiology, Beth Israel Deaconess Medical Center, Boston, MA.
² Present address: Department of Diagnostic Imaging and Nuclear Medicine, Kyoto University, Kyoto, Japan.
³ Department of Medical Physics in Radiology, German Cancer Research Center (DKFZ), Heidelberg, Germany.
⁴ Department of Radiology, German Cancer Research Center (DKFZ), Heidelberg, Germany.
⁵ Department of Radiology, Kobe University Graduate School of Medicine, Kobe, Japan.
⁶ Department of Radiology, Brigham and Women's Hospital, 75 Francis St., Boston, MA 02115.

OBJECTIVE. This article aims to summarize the available data on reducing radiation dose exposure in routine chest CT protocols. First, the general aspects of radiation dose in CT and radiation risk are discussed, followed by the effect of changing parameters on image quality. Finally, the results of previous radiation dose reduction studies are reviewed, and important information contributing to radiation dose reduction will be shared.

CONCLUSION. A variety of methods and techniques for radiation dose reduction should be used to ensure that radiation exposure is kept as low as is reasonably achievable.

Keywords: cancer risk • chest CT • CT • radiation dose • radiation safety

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