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Detection of Coronary Calcifications: Feasibility of Dose Reduction with a Body Weight–Adapted Examination Protocol

A. H. Mahnken1, J. E. Wildberger1, J. Simon2, R. Koos3, T. G. Flohr2, S. Schaller2 and R. W. Günther1

1 Department of Diagnostic Radiology, University of Technology, Aachen, University Hospital, Pauwelsstr. 30, D-52074 Aachen, Germany.
2 Siemens Medical Solutions, Siemensstr., D-91301 Forchheim, Germany.
3 Medical Clinic I, University of Technology, Aachen, University Hospital, D-52074 Aachen, Germany.



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  		Fig. 1. —Scatterplot shows ratio between body weight (kg) and image noise (H) for nonoverlapping image reconstruction at 133 mAseff. r2 = 0.301, slope = 0.081 H/kg, intersection = 11.956 H.

 


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  		Fig. 2. —Scatterplot shows ratio between body mass index (kg/m2) and image noise (H) for nonoverlapping image reconstruction at 133 mAseff. r2 = 0.370, slope = 0.378 H/kg per millimeter squared, intersection = 8.163 H.

 


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  		Fig. 3. —Scatterplot shows ratio between body weight (kg) and image noise (H) for nonoverlapping image reconstruction with body weight–adapted tube current time setting. r2 = 0.225, slope = 0.054 H/kg, intersection = 14.528 H.

 


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  		Fig. 4. —Scatterplot shows ratio between body mass index (kg/m2) and image noise (H) for nonoverlapping image reconstruction with body weight–adapted tube current time setting. r2 = 0.275, slope = 0.190 H/kg per millimeter squared, intersection = 14.210 H.

 

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