X線スペクトルの適正化による画像の改善と被曝の低減

概要

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We studied reduction in patient dose and improvement of image contrast in drip infusion pyelography (DIP) and bone radiography using a copper filter. More suitable x-ray spectra for the K-absorption edge of iodine contrast media were investigated by using various combinations of tube voltage and copper filter. Image contrast and patient dose from 60-70 kV with a copper filter were compared with those at 80 kV without the filter. We found that patient dose could be reduced by 13-40% with the copper filter compared with that for an 80 kV tube voltage without the filter. Image contrast was improved 1.2 times compared with the result for an 80 kV tube voltage without filter. An x-ray spectrum suitable for the object improves image contrast and reduces patient does.
社団法人日本放射線技術学会の論文
1999-06-20