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British Journal of Radiology (2003) 76, 51-56
© 2003 British Institute of Radiology
doi: 10.1259/bjr/53215511
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Full Paper

A method for the systematic selection of technique factors in paediatric CT

C J Kotre, PhD and S P Willis, DCR

Regional Medical Physics Department, Newcastle General Hospital, Newcastle-upon-Tyne NE4 6BE, UK

A method for the systematic selection of paediatric CT technique factors is described. The approach is based on the assumption that the level of image noise acceptable for a given adult CT image is also acceptable for the equivalent paediatric examination. A simple exponential attenuation model is proposed. Effective linear attenuation coefficients were initially established from a series of phantom measurements simulating head, chest and abdomen examinations at 120 kVp, then extended for a range of tube potentials and beam qualities using a beam spectral model. Application of the method is demonstrated using phantoms representing head, chest and abdomen sections for neonate and ages 1 year, 5 years, 10 years, 15 years and adult.






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