Contrast to Noise Ratio and Contrast Detail Analysis in Mammography:A Monte Carlo Study

International Conference on Bio-Medical Instrumentation and related Engineering and Physical Sciences

物理学;医药卫生

Metaxas, V.^1 ; Delis, H.^1 ; Kalogeropoulou, C.^2 ; Zampakis, P.^2 ; Panayiotakis, G.^1

Department of Medical Physics, School of Medicine, University of Patras, Patras, Greece^1

Department of Radiology, School of Medicine, University of Patras, Patras, Greece^2

关键词: Contrast detail;    Contrast detail analysis;    Contrast to noise ratio;    Filter materials;    Human observers;    Imaging performance;    K-edge filters;    Quality characteristic;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/637/1/012017/pdf
DOI  :  10.1088/1742-6596/637/1/012017

学科分类：卫生学

来源: IOP

【 摘 要 】

The mammographic spectrum is one of the major factors affecting image quality in mammography. In this study, a Monte Carlo (MC) simulation model was used to evaluate image quality characteristics of various mammographic spectra. The anode/filter combinations evaluated, were those traditionally used in mammography, for tube voltages between 26 and 30 kVp. The imaging performance was investigated in terms of Contrast to Noise Ratio (CNR) and Contrast Detail (CD) analysis, by involving human observers, utilizing a mathematical CD phantom. Soft spectra provided the best characteristics in terms of both CNR and CD scores, while tube voltage had a limited effect. W-anode spectra filtered with k-edge filters demonstrated an improved performance, that sometimes was better compared to softer x-ray spectra, produced by Mo or Rh anode. Regarding the filter material, k-edge filters showed superior performance compared to Al filters.