Journal
RADIOLOGY
Volume 233, Issue 3, Pages 649-657Publisher
RADIOLOGICAL SOC NORTH AMERICA
DOI: 10.1148/radiol.2333031150
Keywords
computed tomography (CT), image quality; computed tomography (CT), radiation exposure; computed tomography (CT), technology; radiations, exposure to patients and personnel; review
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Introduction of slip-ring technology with subsequent development of single - and multi - detector row helical computed tomographic (CT) scanners have expanded the applications of CT, leading to a substantial increase in the number of CT examinations being performed. Owing to concerns about the resultant increase in associated radiation dose, many technical innovations have been introduced. One such innovation is automatic tube current modulation. The purpose of automatic tube current modulation is to maintain constant image quality regardless of patient attenuation characteristics, thus allowing radiation dose to patients to be reduced. This review discusses the principles, clinical use, and limitations of different automatic tube current modulation techniques.
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