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Influence of patient age on normalized effective doses calculated for CT examinations

A Khursheed, PhD M C Hillier P C Shrimpton, PhD and B F Wall, BSc

National Radiological Protection Board, Chilton, Didcot, Oxfordshire OX11 0RQ, UK



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  		Figure 1. Representation of X-ray source for a CT slice.

 


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  		Figure 2. Positioning of bow tie filters relative to line sources.

 


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  		Figure 3. Trends with age in normalized effective dose for examination of the head and neck.

 


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  		Figure 4. Trends with age in normalized effective dose for examination of the chest.

 


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  		Figure 5. Trends with age in normalized effective dose for examination of the abdomen and pelvis.

 


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  		Figure 6. Trends with age in normalized effective dose for examination of the trunk.

 




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