Multislice spiral CT (MSCT) in pediatric radiology: dose reduction for chest and abdomen examinations

RöFo : Fortschritte auf dem Gebiete der Röntgenstrahlen und der Nuklearmedizin
D HonnefG Staatz

Abstract

The advent of multislice spiral CT (MSCT) technique has led to new aspects of dose reduction, especially for the dedicated use of MSCT in children. Optimizing pediatric MSCT protocols according to the clinical problem allows reduction of radiation exposure to a minimum without loss of diagnostic quality. The different parameters that influence the degree of dose reduction, like tube current-time product (mAs), tube voltage (kV), collimation and pitch, are discussed in context with previously published data and our own experience in nearly 200 pediatric CT examinations. In our department, the effective mAs is calculated for a pediatric chest MSCT by multiplication of the body weight in kilogram with a factor of 1 to 1.5 and for a pediatric abdominal MSCT by multiplication with a factor of 2 to 2.5. To calculate the equivalent effective dose for a contrast media-enhanced 80 kV protocol, the effective mAs of the 120 kV protocol can be multiplied by 2.7. A factor less than 2.7 means further dose reduction. Compared to the radiation exposure with a standard adult protocol, the effective dose in a pediatric thoracic MSCT could be reduced by up to 92 % in neonates, 89 % in toddlers and 80 % in school children. In abdominal MSCT, the e...Continue Reading

Citations

Jan 17, 2009·Pediatric Radiology·Robin D MunkThorsten A Bley
May 19, 2009·Pediatric Radiology·Christiane Franzius, Kai Uwe Juergens
Jul 11, 2006·European Journal of Nuclear Medicine and Molecular Imaging·Christiane FranziusOtmar Schober
Jun 16, 2009·European Journal of Nuclear Medicine and Molecular Imaging·Niklas JasperDirk Foell
Apr 13, 2007·European Radiology·Joern KemperClaus Nolte-Ernsting
Jan 24, 2008·AJR. American Journal of Roentgenology·Dagmar HonnefAndreas H Mahnken
Apr 24, 2008·AJR. American Journal of Roentgenology·Christopher HerzogU Joseph Schoepf
Apr 22, 2009·Medical Physics·Willi A KalenderSabrina V Vollmar
Jul 22, 2011·Deutsches Ärzteblatt International·Gerhard Alzen, Gabriele Benz-Bohm

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