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Comparison of signal to noise ratios from spatial and frequency domain formulations of nonprewhitening model observers in digital mammography
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10.1118/1.4747267
/content/aapm/journal/medphys/39/9/10.1118/1.4747267
http://aip.metastore.ingenta.com/content/aapm/journal/medphys/39/9/10.1118/1.4747267

Figures

Image of FIG. 1.
FIG. 1.

Standard deviation of pixel values in ROIs with a size of 400 pixels calculated for different numbers of input images.

Image of FIG. 2.
FIG. 2.

Comparison of SNRNPW calculated in pixel and frequency domain for four series of discs of different thicknesses for the clinical operation point of the Novation system (29 kV, W/Rh, 100 mAs). The s.d. label means spatial domain, while f.d. means frequency domain. Logarithmic scale has been used for both the axes in order to emphasize the error bars otherwise difficult to detect.

Image of FIG. 3.
FIG. 3.

Comparison of SNRNPW calculated in pixel and frequency domain for four series of discs of different thicknesses for the clinical operation point of the Inspiration system (29 kV, W/Rh, 100 mAs). The s.d. label means spatial domain, while f.d. means frequency domain. Logarithmic scale has been used for both the axes in order to emphasize the error bars otherwise difficult to detect.

Tables

Generic image for table
TABLE I.

List of the subset of CDMAM discs used in this study.

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TABLE II.

Slope and intercept of lines representing the SNRNPW of a gold disc of given thickness as function of the disc diameter. Columns F and S refer to frequency and spatial domain, respectively.

Generic image for table
TABLE III.

Comparison of the signal and noise normalized to contrast for the spatial domain and frequency domain formulation for Novation system. Diameter (D) and thickness (T) of each disc are reported in the first two columns.

Generic image for table
TABLE IV.

Comparison of the signal and noise normalized to contrast for the spatial domain and frequency domain formulation for the Inspiration system. Diameter (D) and thickness (T) of each disc are reported in the first two columns.

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/content/aapm/journal/medphys/39/9/10.1118/1.4747267
2012-08-29
2014-04-24
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Comparison of signal to noise ratios from spatial and frequency domain formulations of nonprewhitening model observers in digital mammography
http://aip.metastore.ingenta.com/content/aapm/journal/medphys/39/9/10.1118/1.4747267
10.1118/1.4747267
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