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Updated: Apr 8, 2026
X-ray Dose Reduction through Adaptive Exposure in Fluoroscopic Imaging
Published on: September 11, 2011
Low-Dose Pelvic Computed Tomography Using Adaptive Iterative Dose Reduction 3-Dimensional Algorithm: A Phantom Study
Hiromitsu Onishi1, Remko Kockelkoren, Tonsok Kim
1From the *Department of Radiology, Osaka University Graduate School of Medicine, Suita, Osaka, Japan; †Faculty of Medical Sciences, University of Groningen, MWF-Complex, Groningen, the Netherlands, ‡Toshiba Medical Systems Corporation, Otawara-Shi, Tochigi, Japan; and §Division of Radiology, Department of Medical Technology, Osaka University Hospital, Suita, Osaka, Japan.
Objective:
To evaluate the image quality and radiation dose reduction in pelvic computed tomography (CT) achieved with an adaptive iterative dose reduction 3-dimensional (AIDR 3D) algorithm using a phantom model.
Methods:
Two phantoms were scanned using a 320-detector row CT scanner with 8 tube current levels, and the images were reconstructed with a standard filtered back projection (FBP) algorithm and with an AIDR 3D algorithm.
Results:
Compared with FBP, AIDR 3D reduced image noise and improved contrast-to-noise ratios. The diagnostic performance for detection of low-contrast targets of AIDR 3D images obtained with 100 mA at 120 kVp was almost as good as that of the FBP images obtained with 200 mA.
Conclusions:
The AIDR 3D algorithm substantially reduced image noise and improved the image quality of pelvic CT images compared with those obtained with the FBP algorithm and can thus be considered a promising technique for low-dose pelvic CT examinations.
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