Digital chest radiography: Collimation and dose reduction

Bidragets oversatte titel: Digital røntgen af thorax, collimering og dosis reduktion

Jeanne Elisabeth Debess, Jens Kristian Vejle-Sørensen, Henrik Thomsen, Karen Kirstine Johnsen

Publikation: Konferencebidrag uden forlag/tidsskriftPaper/skriftligt oplægForskningpeer review

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Background: Chest radiography is one of the most common examinations in radiology departments. In 2013 approximately 80,000 chest x-rays were performed on women in the fertile age. Even low dose for the examinationCorrect collimation
Purpose: Quality improvement of basic radiography focusing on collimation and dose reduction in digital chest radiography
Methods and Materials
A retrospective study of digital chest radiography is performed to evaluate the primary x-ray tube collimation of the PA and lateral radiographs. Data from one hundred fifty self-reliant female patients between 15 and 55 years of age are included in the study. The clinical research is performed between September and November 2014 where 3rd year Radiography students collect data on four Danish x-ray departments using identical procedures under guidance of clinical supervisors. Optimal collimation is determined by European and Regional Danish guidelines. The areal between current and optimal collimation is calculated. The experimental research is performed in September - October 2014 on a Siemens DR Optipop, using 150 kV, 1,2 -3,3 mAs and SID of 180 centimetres using a phantom and lithium fluoride thermo luminescence dosimeter (TLD). Dose to risk organs mamma, thyroid and colon are measured at different collimations with one-centimetre steps. TLD results are used to estimate dose reduction for different collimations.

Results: Preliminary results from partial data show from 15% to 75% of the chest radiographs have excessive collimations depending on side of radiograph. Results from dose reduction will be presented on the congress
Conclusion: Correct positioning and collimation of digital chest radiographs can reduce the radiation dose significant to the patients and by that improve the quality of basic radiography.
Bidragets oversatte titelDigital røntgen af thorax, collimering og dosis reduktion
Publikationsdato4 mar. 2015
Antal sider2
StatusUdgivet - 4 mar. 2015
BegivenhedEuropean Congress of Radiology: ECR - Wien, Østrig
Varighed: 4 mar. 20158 mar. 2015


KonferenceEuropean Congress of Radiology: ECR