Establishing daily quality control (QC) in screen-film mammography using leeds tor (max) phantom at the breast imaging unit of USTH-Benavides Cancer Institute

13th South-East Asian Congress of Medical Physics 2015

物理学;医药卫生

Acaba, K.J.C.^1,2 ; Cinco, L.D.^2 ; Melchor, J.N.^3

Graduate School, University of Santo Tomas, España Blvd., Manila, Philippines^1

Breast Imaging Unit, Benavides Cancer Institute, University of Santo Tomas Hospital, Manila, Philippines^2

Center for Device Regulation, Radiation Health and Research - Food and Drug Administration, Department of Health, Manila, Philippines^3

关键词: Attenuation characteristics;    Breast imaging;    Breast phantom;    Image quality parameters;    Phantom images;    Screen-film mammographies;    Technical factors;    Test protocols;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/694/1/012038/pdf
DOI  :  10.1088/1742-6596/694/1/012038

学科分类：卫生学

来源: IOP

【 摘 要 】

Daily QC tests performed on screen film mammography (SFM) equipment are essential to ensure that both SFM unit and film processor are working in a consistent manner. The Breast Imaging Unit of USTH-Benavides Cancer Institute has been conducting QC following the test protocols in the IAEA Human Health Series No.2 manual. However, the availability of Leeds breast phantom (CRP E13039) in the facility made the task easier. Instead of carrying out separate tests on AEC constancy and light sensitometry, only one exposure of the phantom is done to accomplish the two tests. It was observed that measurements made on mAs output and optical densities (ODs) using the Leeds TOR (MAX) phantom are comparable with that obtained from the usual conduct of tests, taking into account the attenuation characteristic of the phantom. Image quality parameters such as low contrast and high contrast details were also evaluated from the phantom image. The authors recognize the usefulness of the phantom in determining technical factors that will help improve detection of smallest pathological details on breast images. The phantom is also convenient for daily QC monitoring and economical since less number of films is expended.