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Does a Combination of Dose Modulation with Fast Gantry Rotation Time Limit CT Image Quality?

Gary M. Israel1, Summer Herlihy, Ami N. Rubinowitz, Daniel Cornfeld and James Brink

1 All authors: Department of Diagnostic Radiology, Yale University School of Medicine, 333 Cedar St., PO Box 208042, New Haven, CT 06520-8042.


Figure 1
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  		Fig. 1 —Scatterplot shows total number of images obtained at tube saturation versus total number of images using high-tube-current scanner.

 

Figure 2
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  		Fig. 2 —Scatterplot shows total number of images obtained at tube saturation versus total number of images using low-tube-current scanner.

 

Figure 3
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  		Fig. 3 —Transverse image from low-tube-current CT scanner in 58-year-old woman with history of uterine cancer. Image was obtained with 153 mA. Image quality was graded as outstanding (score = 1).

 

Figure 4
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  		Fig. 4 —Transverse image from low-tube-current CT scanner in 41-year-old woman with history of bowel obstruction. Image was obtained with tube current saturated (440 mA). Image quality was graded as poor (score = 4).

 

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