| Theme | CT Colonography 2019 -- Recent Advances, Current Status and Its Evaluation as a Modality for Organized Cancer Screening | |
|---|---|---|
| Title | Radiation Dose Reduction in CT Colonography | |
| Publish Date | 2019/03 | |
| Author | Seitaro Oda | Department of Diagnostic Image Analysis, Kumamoto University |
| Author | Narumi Taguchi | Department of Diagnostic Radiology, Kumamoto University Hospital |
| Author | Yasuhiro Yokota | Department of Diagnostic Radiology, Kumamoto University Hospital |
| Author | Masanori Imuta | Department of Diagnostic Radiology, Kumamoto University Hospital |
| Author | Tadatoshi Tsuchigame | Kumamoto General Health Center |
| Author | Yasuyuki Yamashita | Department of Diagnostic Radiology, Kumamoto University Hospital |
| [ Summary ] | CT colonography (CTC) is a widely accepted screening tool for colorectal cancer because of its excellent diagnostic performance and good patient tolerance. However, there are concerns with respect to potential risks related to the ionizing radiation of CTC. Radiation protection is based on the application of two principles, i. e., justification and optimization, which have been established by the International Commission of Radiation Protection. Consequently, the radiation dose of CTC should be kept at the minimum needed for diagnostically adequate image quality in accordance with the "as low as reasonably achievable" principle. As a reduction in the radiation dose results in increased image noise and decreased image quality, it is critically important to balance the delivery of low radiation doses with the likelihood of obtaining diagnostically useful images. This review aims to summarize the basic concepts of radiation exposure from medical imaging and radiation dose reduction techniques in CTC. | |