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Radiology. 2004 Dec;233(3):649-57. Epub 2004 Oct 21.

Techniques and applications of automatic tube current modulation for CT.

Author information

1
Division of Abdominal Imaging and Intervention, Department of Radiology, Massachusetts General Hospital and Harvard Medical School, Wht-270, 32 Fruit Street, Boston, MA 02134, USA. mannudeep_k_kalra@yahoo.com

Abstract

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.

PMID:
15498896
DOI:
10.1148/radiol.2333031150
[Indexed for MEDLINE]

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