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Optimization of exposure parameters in full field digital mammography using figure of merit

Mammography is used as a screening tool for early detection of breast cancer. However, the radiation dose used should be as low as possible to minimize any effects on asymptomatic woman while maintaining the diagnostic value of the image as mammography is done annually. This study was done to determ...

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Main Authors: Laila Suryani Elias,, Eng, May Lin, Ang, Wee Chin, Abd Aziz Tajuddin,, Shantini A. Arasaratnam,, Suraya Aziz,, Khairul Osman,, Kanaga Kumari Chelliah,
Format: Article
Language:English
Published: Universiti Kebangsaan Malaysia 2010
Online Access:http://journalarticle.ukm.my/7336/1/01_Md_Yeaminhossain.pdf
http://journalarticle.ukm.my/7336/
http://www.ukm.my/jsm/english_journals/vol39num2_2010/contentsVol39num2_2010.html
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spelling my-ukm.journal.73362016-12-14T06:43:46Z http://journalarticle.ukm.my/7336/ Optimization of exposure parameters in full field digital mammography using figure of merit Laila Suryani Elias, Eng, May Lin Ang, Wee Chin Abd Aziz Tajuddin, Shantini A. Arasaratnam, Suraya Aziz, Khairul Osman, Kanaga Kumari Chelliah, Mammography is used as a screening tool for early detection of breast cancer. However, the radiation dose used should be as low as possible to minimize any effects on asymptomatic woman while maintaining the diagnostic value of the image as mammography is done annually. This study was done to determine the optimum exposure parameter in exposure control mode (AEC) for two combinations of anode/filter which were molybdenum/molybdenum (Mo/Mo) and molybdenum/rhodium (Mo/Rh) using the Lorad Selenia digital mammography system at the Women’s Breast Clinic, National Cancer Society (NCS). A CIRS012A mammography research of phantom 4 cm thickness with 50% glandularity was exposed in the cranio-caudal projection. TLD 100H was used to measure the entrance surface air kerma (ESAK). The AGD values were then calculated from the ESAK values, incorporating three correction factors (g, c and s) according to Euref protocol. Image quality was evaluated using signal to noise ratio (SNR). Figure of Merit (FOM) which is the ratio of the square of SNR to the AGD shows that 30 kVp is the optimum exposure parameter for a 4 cm thickness phantom with the use of Mo/Rh and Mo/Mo anode/filter combination. Non-parametric Spearman correlation test showed a negative linear relationship between AGD and SNR with increasing tube voltage for both anode/filters. Universiti Kebangsaan Malaysia 2010-04 Article PeerReviewed application/pdf en http://journalarticle.ukm.my/7336/1/01_Md_Yeaminhossain.pdf Laila Suryani Elias, and Eng, May Lin and Ang, Wee Chin and Abd Aziz Tajuddin, and Shantini A. Arasaratnam, and Suraya Aziz, and Khairul Osman, and Kanaga Kumari Chelliah, (2010) Optimization of exposure parameters in full field digital mammography using figure of merit. Sains Malaysiana, 39 (2). pp. 299-303. ISSN 0126-6039 http://www.ukm.my/jsm/english_journals/vol39num2_2010/contentsVol39num2_2010.html
institution Universiti Kebangsaan Malaysia
building Perpustakaan Tun Sri Lanang Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Kebangsaan Malaysia
content_source UKM Journal Article Repository
url_provider http://journalarticle.ukm.my/
language English
description Mammography is used as a screening tool for early detection of breast cancer. However, the radiation dose used should be as low as possible to minimize any effects on asymptomatic woman while maintaining the diagnostic value of the image as mammography is done annually. This study was done to determine the optimum exposure parameter in exposure control mode (AEC) for two combinations of anode/filter which were molybdenum/molybdenum (Mo/Mo) and molybdenum/rhodium (Mo/Rh) using the Lorad Selenia digital mammography system at the Women’s Breast Clinic, National Cancer Society (NCS). A CIRS012A mammography research of phantom 4 cm thickness with 50% glandularity was exposed in the cranio-caudal projection. TLD 100H was used to measure the entrance surface air kerma (ESAK). The AGD values were then calculated from the ESAK values, incorporating three correction factors (g, c and s) according to Euref protocol. Image quality was evaluated using signal to noise ratio (SNR). Figure of Merit (FOM) which is the ratio of the square of SNR to the AGD shows that 30 kVp is the optimum exposure parameter for a 4 cm thickness phantom with the use of Mo/Rh and Mo/Mo anode/filter combination. Non-parametric Spearman correlation test showed a negative linear relationship between AGD and SNR with increasing tube voltage for both anode/filters.
format Article
author Laila Suryani Elias,
Eng, May Lin
Ang, Wee Chin
Abd Aziz Tajuddin,
Shantini A. Arasaratnam,
Suraya Aziz,
Khairul Osman,
Kanaga Kumari Chelliah,
spellingShingle Laila Suryani Elias,
Eng, May Lin
Ang, Wee Chin
Abd Aziz Tajuddin,
Shantini A. Arasaratnam,
Suraya Aziz,
Khairul Osman,
Kanaga Kumari Chelliah,
Optimization of exposure parameters in full field digital mammography using figure of merit
author_facet Laila Suryani Elias,
Eng, May Lin
Ang, Wee Chin
Abd Aziz Tajuddin,
Shantini A. Arasaratnam,
Suraya Aziz,
Khairul Osman,
Kanaga Kumari Chelliah,
author_sort Laila Suryani Elias,
title Optimization of exposure parameters in full field digital mammography using figure of merit
title_short Optimization of exposure parameters in full field digital mammography using figure of merit
title_full Optimization of exposure parameters in full field digital mammography using figure of merit
title_fullStr Optimization of exposure parameters in full field digital mammography using figure of merit
title_full_unstemmed Optimization of exposure parameters in full field digital mammography using figure of merit
title_sort optimization of exposure parameters in full field digital mammography using figure of merit
publisher Universiti Kebangsaan Malaysia
publishDate 2010
url http://journalarticle.ukm.my/7336/1/01_Md_Yeaminhossain.pdf
http://journalarticle.ukm.my/7336/
http://www.ukm.my/jsm/english_journals/vol39num2_2010/contentsVol39num2_2010.html
_version_ 1643737088426770432
score 13.211869

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