Effective x-ray attenuation measurements with full field digital mammography

被引:27
作者
Heine, John J. [1 ]
Behera, Madhusmita [1 ]
机构
[1] H Lee Moffitt Canc Ctr & Res Inst, Tampa, FL 33612 USA
关键词
effective attenuation coefficients; breast density; radiometric; calibration; phantom measures; integral mean value theorem;
D O I
10.1118/1.2356648
中图分类号
R8 [特种医学]; R445 [影像诊断学];
学科分类号
1002 [临床医学]; 100207 [影像医学与核医学]; 1009 [特种医学];
摘要
This work shows that effective x-ray attenuation coefficients may be estimated by applying Beer's Law to phantom image data acquired with the General Electric Senographe 2000D full field digital mammography system. Theoretical developments are provided indicating that an approximate form of the Beer's relation holds for polychromatic x-ray beams. The theoretical values were compared with experimentally determined measured values, which were estimated at various detector locations. The measured effective attenuation coefficients are in agreement with those estimated with theoretical developments and numerical integration. The work shows that the measured quantities show little spatial variation. The main ideas are demonstrated with polymethylmethacrylate and breast tissue equivalent phantom imaging experiments. The work suggests that the effective attenuation coefficients may be used as known values for radiometric standardization applications that compensate for the image acquisition influences. The work indicates that it is possible to make quantitative attenuation coefficient measurements from a system designed for clinical purposes. (c) 2006 American Association of Physicists in Medicine.
引用
收藏
页码:4350 / 4366
页数:17
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