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Optimal beam quality selection based on contrast-to-noise ratio and mean glandular dose in digital mammography

The performance of a digital mammography system (Siemens Mammomat Novation) using different target/filter combinations and tube voltage has been assessed. The objective of this study is to optimize beam quality selection based on contrast-to-noise ratio (CNR) and mean glandular dose (MGD). Three com...

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Main Authors: Aminah, M., Ng, K.H., Abdullah, Basri Johan Jeet, Jamal, N.
Format: Article
Language:English
English
Published: Springer 2010
Subjects:
R Medicine
Online Access:http://eprints.um.edu.my/4135/1/Optimal_beam_quality_selection_based_on_contrast-to-noise_ratio_and_mean_glandular_dose_in_digital_mammography.pdf
http://eprints.um.edu.my/4135/2/Optimal_beam_quality_selection_based_on_contrast-to-noise_ratio.pdf
http://eprints.um.edu.my/4135/
https://doi.org/10.1007/s13246-010-0035-3
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spelling my.um.eprints.41352019-08-28T03:59:58Z http://eprints.um.edu.my/4135/ Optimal beam quality selection based on contrast-to-noise ratio and mean glandular dose in digital mammography Aminah, M. Ng, K.H. Abdullah, Basri Johan Jeet Jamal, N. R Medicine The performance of a digital mammography system (Siemens Mammomat Novation) using different target/filter combinations and tube voltage has been assessed. The objective of this study is to optimize beam quality selection based on contrast-to-noise ratio (CNR) and mean glandular dose (MGD). Three composition of breast were studied with composition of glandular/adipose of 30/70, 50/50, and 70/30. CNR was measured using 2, 4 and 6 cm-thick simulated breast phantoms with an aluminium sheet of 0.1 mm thickness placed on top of the phantom. Three target/filter combinations, namely molybdenum/molybdenum (Mo/Mo), molybdenum/rhodium (Mo/Rh) and tungsten/rhodium (W/Rh) with various tube voltage and mAs were tested. MGD was measured for each exposure. For 50/50 breast composition, Mo/Rh combination with tube voltage 26 kVp is optimal for 2 cm-thick breast. W/Rh combination with tube voltage 27 and 28 kVp are optimal for 4 and 6 cm-thick breast, respectively. For both 30/70 and 70/30 breast composition, W/Rh combination is optimal with tube voltage 25, 26 and 27 kVp, respectively. From our study it was shown that there are potential of dose reduction up to 11 for a set CNR of 3.0 by using beam quality other than that are determined by AEC selection. Under the constraint of lowest MGD, for a particular breast composition, calcification detection is optimized by using a softer X-ray beam for thin breast and harder X-ray beam for thick breast. These experimental results also indicate that for breast with high fibroglandular tissues (70/30), the use of higher beam quality does not always increase calcification detection due to additional structured noise caused by the fibroglandular tissues itself. Springer 2010 Article PeerReviewed text en http://eprints.um.edu.my/4135/1/Optimal_beam_quality_selection_based_on_contrast-to-noise_ratio_and_mean_glandular_dose_in_digital_mammography.pdf text en http://eprints.um.edu.my/4135/2/Optimal_beam_quality_selection_based_on_contrast-to-noise_ratio.pdf Aminah, M. and Ng, K.H. and Abdullah, Basri Johan Jeet and Jamal, N. (2010) Optimal beam quality selection based on contrast-to-noise ratio and mean glandular dose in digital mammography. Australasian Physical and Engineering Sciences in Medicine, 33 (4). pp. 329-334. ISSN 0158-9938 https://doi.org/10.1007/s13246-010-0035-3 doi:10.1007/s13246-010-0035-3
institution Universiti Malaya
building UM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Malaya
content_source UM Research Repository
url_provider http://eprints.um.edu.my/
language English
English
topic R Medicine
spellingShingle R Medicine
Aminah, M.
Ng, K.H.
Abdullah, Basri Johan Jeet
Jamal, N.
Optimal beam quality selection based on contrast-to-noise ratio and mean glandular dose in digital mammography
description The performance of a digital mammography system (Siemens Mammomat Novation) using different target/filter combinations and tube voltage has been assessed. The objective of this study is to optimize beam quality selection based on contrast-to-noise ratio (CNR) and mean glandular dose (MGD). Three composition of breast were studied with composition of glandular/adipose of 30/70, 50/50, and 70/30. CNR was measured using 2, 4 and 6 cm-thick simulated breast phantoms with an aluminium sheet of 0.1 mm thickness placed on top of the phantom. Three target/filter combinations, namely molybdenum/molybdenum (Mo/Mo), molybdenum/rhodium (Mo/Rh) and tungsten/rhodium (W/Rh) with various tube voltage and mAs were tested. MGD was measured for each exposure. For 50/50 breast composition, Mo/Rh combination with tube voltage 26 kVp is optimal for 2 cm-thick breast. W/Rh combination with tube voltage 27 and 28 kVp are optimal for 4 and 6 cm-thick breast, respectively. For both 30/70 and 70/30 breast composition, W/Rh combination is optimal with tube voltage 25, 26 and 27 kVp, respectively. From our study it was shown that there are potential of dose reduction up to 11 for a set CNR of 3.0 by using beam quality other than that are determined by AEC selection. Under the constraint of lowest MGD, for a particular breast composition, calcification detection is optimized by using a softer X-ray beam for thin breast and harder X-ray beam for thick breast. These experimental results also indicate that for breast with high fibroglandular tissues (70/30), the use of higher beam quality does not always increase calcification detection due to additional structured noise caused by the fibroglandular tissues itself.
format Article
author Aminah, M.
Ng, K.H.
Abdullah, Basri Johan Jeet
Jamal, N.
author_facet Aminah, M.
Ng, K.H.
Abdullah, Basri Johan Jeet
Jamal, N.
author_sort Aminah, M.
title Optimal beam quality selection based on contrast-to-noise ratio and mean glandular dose in digital mammography
title_short Optimal beam quality selection based on contrast-to-noise ratio and mean glandular dose in digital mammography
title_full Optimal beam quality selection based on contrast-to-noise ratio and mean glandular dose in digital mammography
title_fullStr Optimal beam quality selection based on contrast-to-noise ratio and mean glandular dose in digital mammography
title_full_unstemmed Optimal beam quality selection based on contrast-to-noise ratio and mean glandular dose in digital mammography
title_sort optimal beam quality selection based on contrast-to-noise ratio and mean glandular dose in digital mammography
publisher Springer
publishDate 2010
url http://eprints.um.edu.my/4135/1/Optimal_beam_quality_selection_based_on_contrast-to-noise_ratio_and_mean_glandular_dose_in_digital_mammography.pdf
http://eprints.um.edu.my/4135/2/Optimal_beam_quality_selection_based_on_contrast-to-noise_ratio.pdf
http://eprints.um.edu.my/4135/
https://doi.org/10.1007/s13246-010-0035-3
_version_ 1643687269830230016
score 13.211869

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