Journal of Medical Physics
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Year : 1995  |  Volume : 20  |  Issue : 2  |  Page : 18-22

Does Bridging The Gap Between Knowledge And Practice Help? Example Of Patient Dose Reduction In Radiology



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M M Rehani


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The paper is aimed at bridging the gap between knowledge and practice and evaluating the impact of this activity on reduction of patient dose. While enormous data on radiation doses in diagnostic radiology exists, there is absolute lack of information at user's level. For example, the implications on patient dose from 1cm error in X-ray field size or error of 5 kVp or 5 mAs is invariably not known. We estimated that 1cm increase in field size results in irradiation of 600-900cc of extra volume of patient which may contain sensitive tissue, 5 kVp increase results in exposure of 3565 mR, with more effect in case of lumbar spine and abdomen X-ray and lesser for chest and D-Spine, 5 mAs error results in 4-25 mR. The impact of information supply to users was evaluated and it was found that information based approach results in dose reduction to patient and improved image quality.


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