APPLICATION OF CONTRAST IMPROVEMENT METHODS FOR CORPULENT PATIENTS UNDERGOING CHEST SCREENING
L. Aslamova, N. Melenevska, E. Kulich, N. Miroshnichenko, S. Miroshnichenko
Received: 2 APR 2015,
Received revised: 22 MAY 2015,
Accepted: 29 MAY 2015,
Published online: 18 OCT 2016
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Annual chest screening in Ukraine is a needed diagnostic procedure due to high level of tuberculosis, and it essentially contributes to the collective effective dose. Particularly this problem is actual for stout patients, who receive a higher exposure dose during chest screening, compared to average patients. This is done to obtain X-ray images with proper visual contrast and accuracy. In the present study, the results obtained with the application of anti-scatter grid technique, common for clinical fluorography examination, were compared to results obtained by image processing, as an improving visual contrast method for stout patients. In the present study, image processing increased the contrast value of test-object in the range of 2.0-2.73 times without ED increase; image processing after signal filtration with anti-scatter grid demonstrated the increase of image contrast 3 times in average along with the ED increase in Bucky factor to the 3.1-3.2.
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