Journal of Medical Physics
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Year : 1998  |  Volume : 23  |  Issue : 4  |  Page : 270-276

Evaluation Of Air Kerma And Mean Glandular Dose In Mammography : A Survey Of 20 Units

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P Bregant

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Source of Support: None, Conflict of Interest: None

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The present paper embodies the results of a study on absorbed dose in mammography. A survey for estimation of dose in mammography was conducted in a region of the north east of ltaly in 20 mammographic centres in hospitals, private and public clinics. The mean glandular absorbed dose in every mammographic centre was estimated using a 4.6 cm thick breast phantom in the presence of compression device. For this purpose. KVp, mAs, and film-focus distance values were selected to optimize the phantom's image. In these conditions, the exposure at the entrance of the phantom was evaluated. A comparison was made between two different methods, based on the entrance exposure values, to calculate the mean glandular dose at each mammographic facility. Taking into account all the mammographic examinations performed in one year in 20 centres, weighted mean glandular doses of 1.5 and 1.6 mGy were obtained with the two methods. The results have been discussed.

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