Experimental Investigation of the Necessity for Extra Flat Field Corrections in Quality Control of Digital Mammography

机译：数字化乳腺摄影质量控制中额外平场校正必要性的实验研究

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The purpose of this work was to investigate whether extra flat field corrections should be applied prior to the calculations of quality control quantities and whether there are necessary precautions regarding flat fielding in digital mammography. Effects from using one standard flat field correction for all imaging situations or absence of correction procedures were examined using homogenous PMMA slabs. Differences in field profiles for various exposure geometries and breast thicknesses were quantified. For three systems the maximal deviation of averaged pixel values (along a profile of ROIs parallel to the chest wall) varied from 1.3 % to 6.8 % over the whole image and from 0.6 % to 2.6 % if the analysis is limited to the central part. Extra flat field corrections are not necessary for most applications. If required, the corrections should be performed from images acquired with the same manual exposure and not after a time gap.

机译：这项工作的目的是调查在质量控制量计算之前是否应进行额外的平场校正，以及是否有必要对数字乳腺摄影中的平场进行预防。使用均质的PMMA平板检查了在所有成像情况下使用一种标准的平场校正所产生的效果或没有校正程序。量化了各种暴露几何形状和乳房厚度的场剖面差异。对于三个系统，平均像素值的最大偏差（沿着平行于胸壁的ROI分布）在整个图像上从1.3％到6.8％不等，而如果分析仅限于中央部分，则在0.6％到2.6％之间不等。在大多数应用中，不需要额外的平场校正。如果需要，应从以相同的手动曝光获取的图像中进行校正，而不是在间隔之后进行。

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《International Workshop on Digital Mammography(IWDM 2006); 20060618-21; Manchester(GB)》|2006年|P.475-481|共7页
会议地点 Manchester(GB)
作者
Paula Poeyry; Federica Zanca; Hilde Bosnians;
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Radiation and Nuclear Safety Authority -STUK, P.O. Box 14, FI-00881 Helsinki, Finland;

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原文格式 PDF
正文语种 eng
中图分类生物医学工程;
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1. Investigation of the effect of anode/filter materials on the dose and image quality of a digital mammography system based on an amorphous selenium flat panel detector. [J] . Baldelli P, Phelan N, Egan G British Journal of Radiology . 2010,第988期

机译：研究阳极/过滤材料对基于非晶硒平板探测器的数字化乳腺摄影系统剂量和图像质量的影响。
2. Image Quality of Digital Direct Flat-Panel Mammography Versus an Indirect Small-Field CCD Technique Using a High-Contrast Phantom [J] . Kathrin BarbaraKrug, HartmutStützer, PeterFrommolt, International Journal of Breast Cancer . 2011,第4期

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3. Experimental investigation of the dose and image quality characteristics of a digital mammography imaging system. [J] . Huda W, Sajewicz AM, Ogden KM, Medical Physics . 2003,第3期

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4. Experimental Investigation of the Necessity for Extra Flat Field Corrections in Quality Control of Digital Mammography [C] . Paula Poyry, Federica Zanca, Hilde Bosmans International Workshop on Digital Mammography(IWDM 2006) . 2006

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5. Image quality, dose, and quality control in screen-film and full-field digital mammography. [D] . Berns, Eric Arthur. 2001

机译：屏幕胶片和全场数字乳腺摄影中的图像质量，剂量和质量控制。
6. Image Quality of Digital Direct Flat-Panel Mammography Versus an Indirect Small-Field CCD Technique Using a High-Contrast Phantom [O] . Kathrin Barbara Krug, Hartmut Stützer, Peter Frommolt, 2011

机译：数字直接平板乳腺X线摄影术与使用高对比度幻像的间接小视场CCD技术的图像质量
7. Image Quality of Digital Direct Flat-Panel Mammography Versus an Indirect Small-Field CCD Technique Using a High-Contrast Phantom [O] . Krug, Kathrin Barbara, Stützer, Hartmut, Frommolt, Peter, 2011

机译：数字直接平板乳腺X线摄影术与使用高对比度幻像的间接小视场CCD技术的图像质量
8. SAPHIRE: A New Flat-Panel Digital Mammography Detector With Avalanche Photoconductor and High-Resolution Field Emitter Readout [R] . Zhao, W. 2006

机译：sapHIRE：采用雪崩光电导体和高分辨率场发射器读数的新型平板数字乳腺X线摄影探测器

Experimental Investigation of the Necessity for Extra Flat Field Corrections in Quality Control of Digital Mammography

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