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《Radiation Protection》 2008-01
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RADIATION DOSIMETRY AND ITS INFLUENCING FACTORS FOR THE MULTI-DETECTOR/SLICE SPIRAL CT

Bai Mei(Xuanwu Hospital,Capital University of Medical Sciences,Beijing,100053)Zheng Junzheng(National Institute for Radiological Protection,China CDC,Beijing,100088)  
The Multi-Detector/Slice Spiral Computed Tomography(MDCT/MSCT)reflects the new progress in equipment and technology for radiology.Its popularized application demonstrates its advantages for clinical diagnosis.With the continuous development and growing uses of the MDCT/MSCT,the medical exposure of the patients and public has also been increasing.Therefore,assessment of the radiation dose and radiation risk from X-CT has become an increasingly important concern that should be addressed.Thus,this paper summarizes the main characteristics of the MDCT/MSCT emphasizing particularly on the radiation dosimetry,and reviews the expressions and measures of radiation dose in the MDCT/MSCT.In addition,main factors that influence radiation dose from the MDCT/MSCT are also discussed.A proper grasp of its radiation dosimetry and assessment method can significantly help radiologists,health physicists,medical physicists,X-CT engineers and manufacturers improve the management of radiation dose while optimizing the image quality in the MDCT/MSCT.
【Fund】: 国家自然科学基金资助项目(批准号30470531)
【CateGory Index】: R144
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