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The effect of scatter and glare on image quality in contrast-enhanced breast imaging using an full-field flat panel detector
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10.1118/1.3077922
/content/aapm/journal/medphys/36/3/10.1118/1.3077922
http://aip.metastore.ingenta.com/content/aapm/journal/medphys/36/3/10.1118/1.3077922

Figures

Image of FIG. 1.
FIG. 1.

Mass attenuation coefficients of iodine and ICRU-44 breast tissue. Typical spectrum for temporal subtraction CE-DM from a Rh target exposed at 49 kV using a 0.27 mm Cu filtration. The spectrum was simulated by extrapolating the Boone model (Ref. 7).

Image of FIG. 2.
FIG. 2.

(Top) Illustration of the breast tissue equivalent phantom positioned on top of the Bucky so as to simulate the MLO view. The contributions of glare , primary , and scatter to the SI at the center of the irradiated phantom area were assessed. (Bottom) Illustration of the geometry for assessing , , and in the presence of the antiscatter grid. and were extrapolated from signal intensities behind Pb disks of various radii . All measurements were performed with the same mA s. , , and without antiscatter grid were acquired in a similar way.

Image of FIG. 3.
FIG. 3.

GPR as a function of the irradiated FOV. The black symbols are GPR values with the breast-equivalent phantom positioned close to the x-ray tube; the gray symbols are GPR values assessed with the breast-equivalent phantom positioned on top of the breast support. GPR was assessed at 49 kV with antiscatter grid.

Image of FIG. 4.
FIG. 4.

(a) , (b) , and (c) as a function of kV for various thicknesses of 50% adipose–50% glandular breast-equivalent phantoms. To assess , of the detector was covered by the phantom, while the entire detector was irradiated. The error bars show the standard error in the mean; they are representative of all and values. Error bars for are negligible and are not shown.

Image of FIG. 5.
FIG. 5.

as a function of kV for various thicknesses of 50% adipose–50% glandular breast-equivalent phantoms. The error bars represent the standard error in the mean; they are representative of all values.

Image of FIG. 6.
FIG. 6.

as a function of kV for various thicknesses of 50% adipose–50% glandular breast-equivalent phantoms. To assess , of the detector was covered by the phantom, while the entire detector was irradiated. The was calculated at the center of the irradiated region of the phantom. The error bars correspond to the standard deviation in .

Image of FIG. 7.
FIG. 7.

as a function of kV for various thicknesses of 50% adipose–50% glandular breast-equivalent phantoms. To assess , of the detector was covered by the phantom, while the entire detector was irradiated. was calculated at the center of the irradiated region of the phantom. The error bars correspond to the standard deviation in .

Image of FIG. 8.
FIG. 8.

as a function of . The lines are theoretical values for various antiscatter grids. The symbols represent experimentally derived .

Tables

Generic image for table
TABLE I.

as a function of irradiated phantom area for various thicknesses of 50% adipose–50% glandular breast-equivalent phantoms exposed at 49 kV. is calculated at the center of irradiated region of the phantom. The mean and standard deviation are given.

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/content/aapm/journal/medphys/36/3/10.1118/1.3077922
2009-02-23
2014-04-24
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: The effect of scatter and glare on image quality in contrast-enhanced breast imaging using an a-Si/CsI(Tl) full-field flat panel detector
http://aip.metastore.ingenta.com/content/aapm/journal/medphys/36/3/10.1118/1.3077922
10.1118/1.3077922
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