digital mammography spectra

Noise power spectra of images from digital

Measurements of the NPS of two detectors for digital mammography are presented to illustrate some of the implications of the choices available. For both systems, two-dimensional noise power spectra obtained over a range of input fluence exhibit pronounced asymmetry between the orthogonal frequency dimensions. The 2D spectra of both systems also ...

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Noise power spectra of images from digital mammography ...

Measurements of the NPS of two detectors for digital mammography are presented to illustrate some of the implications of the choices available. For both systems, two-dimensional noise power spectra obtained over a range of input fluence exhibit pro-nounced asymmetry between the orthogonal frequency dimensions. The 2D spectra of both systems

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Optimal X-Ray Spectra Selection in Digital

Jan 09, 2013  Abstract: In this work, a semi-analytical model was developed to determine the contrast-to-noise ratio (CNR) and the normalized average glandular dose (D̅ gN) in digital mammography, taking into account interactions up to second order.The optimal x-ray spectra were investigated using a Figure of Merit (FOM), for different breast thicknesses (3 cm ≤ L ≤ 7

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Optimization of x-ray spectra in digital mammography ...

Jun 14, 2019  different x-ray spectra in digital mammography, through a figure of merit (FOM), defined as FOM = CNR2/D¯ g, with CNR being the contrast-to-noise ratio in image and D¯ g being the average glandular dose. The FOM was studied for breasts with different thicknesses t (2 cm t 8cm) and glandular contents (25%, 50% and 75% glandularity). The ...

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Noise power spectra of images from digital mammography ...

Jul 12, 1999  Measurements of the NPS of two detectors for digital mammography are presented to illustrate some of the implications of the choices available. For both systems, two-dimensional noise power spectra obtained over a range of input fluence exhibit pronounced asymmetry between the orthogonal frequency dimensions.

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Dynamic range requirements in digital mammography

The dynamic range and the number of gray levels, gamma s, required for digital mammography has been evaluated using an energy transport model. The effects of molybdenum (Mo) and tungsten (W) target spectra and the energy-dependent attenuation by elemental filters, breast tissue, and a phosphor scree

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Digital Mammography - spectra, health, imaging, limited ...

Digital mammography uses x-rays to easily detect abnormalities that otherwise may not be viewed clearly with traditional mammography. At Spectra Health,

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Optimization of x-ray spectra in digital mammography ...

In this work, a Monte Carlo code was used to investigate the performance of different x-ray spectra in digital mammography, through a figure of merit (FOM), defined as FOM =

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Noise power spectra of images from digital mammography ...

Measurements of the NPS of two detectors for digital mammography are presented to illustrate some of the implications of the choices available. For both systems, two-dimensional noise

More

Optimal X-Ray Spectra Selection in Digital Mammography: A ...

Jan 09, 2013  Abstract: In this work, a semi-analytical model was developed to determine the contrast-to-noise ratio (CNR) and the normalized average glandular dose (D̅ gN) in digital

More

Optimization of x-ray spectra in digital mammography ...

Jun 14, 2019  different x-ray spectra in digital mammography, through a figure of merit (FOM), defined as FOM = CNR2/D¯ g, with CNR being the contrast-to-noise ratio in image

More

Noise power spectra of images from digital mammography ...

Jul 12, 1999  Measurements of the NPS of two detectors for digital mammography are presented to illustrate some of the implications of the choices available. For both systems, two

More

Noise power spectra of images from digital mammography ...

Measurements of the NPS of two detectors for digital mammography are presented to illustrate some of the implications of the choices available. For both systems, two-dimensional noise

More

(PDF) Quality control for digital mammography in the ACRIN ...

The Digital Mammography Imaging Screening Trial, ... 2D noise power spectra, and signal- to-noise ratio 共SNR兲. The mean glandular doses for the standard breast ranged from 0.79 to

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Contrast-Enhanced Mammography (CEM) DenseBreast-info, Inc.

Contrast-enhanced mammography (CEM), also known as contrast-enhanced spectral mammography (CESM) or contrast-enhanced digital mammography (CEDM), is an imaging

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The Physics and Technology of Mammography

The X-ray Beam Spectrum: One of the most unique features of mammography compared to other radiographic procedures is the x-ray beam spectrum that is used. A spectrum with

More

(PDF) Optimization of Tungsten X-Ray Spectra for Digital ...

In digital mammography, an alternative spectrum is preferable for breasts thicker than 2 cm" (Dance et al., 2000b). By using the already defined FoM for optimization (see eqn [1]), ...

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Contrast-Enhanced Spectral Mammography

“A sequence of contrast mammography could be added, similar to the way contrast MRI might be added, staggered every six months, coming between standard digital mammography

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Digital Mammography - spectra, health, imaging, limited ...

Digital mammography uses x-rays to easily detect abnormalities that otherwise may not be viewed clearly with traditional mammography. At Spectra Health, we are committed to finding the most invasive cancers as early as possible. This is

More

Optimization of x-ray spectra in digital mammography ...

In this work, a Monte Carlo code was used to investigate the performance of different x-ray spectra in digital mammography, through a figure of merit (FOM), defined as FOM = CNR²/(¯)D(g), with CNR being the contrast-to-noise ratio in image and [Formula: see text] being the average glandular dose. Th

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Noise power spectra of images from digital mammography ...

Measurements of the NPS of two detectors for digital mammography are presented to illustrate some of the implications of the choices available. For both systems, two-dimensional noise power spectra obtained over a range of input fluence exhibit pronounced asymmetry between the orthogonal frequency dimensions. The 2D spectra of both systems also ...

More

Optimal X-Ray Spectra Selection in Digital Mammography: A ...

Jan 09, 2013  Abstract: In this work, a semi-analytical model was developed to determine the contrast-to-noise ratio (CNR) and the normalized average glandular dose (D̅ gN) in digital mammography, taking into account interactions up to second order.The optimal x-ray spectra were investigated using a Figure of Merit (FOM), for different breast thicknesses (3 cm ≤ L ≤ 7

More

Optimization of x-ray spectra in digital mammography ...

Jun 14, 2019  different x-ray spectra in digital mammography, through a figure of merit (FOM), defined as FOM = CNR2/D¯ g, with CNR being the contrast-to-noise ratio in image and D¯ g being the average glandular dose. The FOM was studied for breasts with different thicknesses t (2 cm t 8cm) and glandular contents (25%, 50% and 75% glandularity). The ...

More

Noise power spectra of images from digital mammography ...

Jul 12, 1999  Measurements of the NPS of two detectors for digital mammography are presented to illustrate some of the implications of the choices available. For both systems, two-dimensional noise power spectra obtained over a range of input fluence exhibit pronounced asymmetry between the orthogonal frequency dimensions.

More

Noise power spectra of images from digital mammography ...

Measurements of the NPS of two detectors for digital mammography are presented to illustrate some of the implications of the choices available. For both systems, two-dimensional noise power spectra obtained over a range of input fluence exhibit pro-nounced asymmetry between the orthogonal frequency dimensions. The 2D spectra of both systems

More

(PDF) Quality control for digital mammography in the ACRIN ...

The Digital Mammography Imaging Screening Trial, ... 2D noise power spectra, and signal- to-noise ratio 共SNR兲. The mean glandular doses for the standard breast ranged from 0.79 to 2.98 mGy, with 1.62 mGy being the average across all units and machine types. For the five systems evaluated, the MTF dropped to 50% at markedly different ...

More

Contrast-Enhanced Mammography (CEM) DenseBreast-info, Inc.

Contrast-enhanced mammography (CEM), also known as contrast-enhanced spectral mammography (CESM) or contrast-enhanced digital mammography (CEDM), is an imaging technique that uses iodinated intravenous (IV) contrast in combination with a standard digital mammogram. Some cancers that are not visible on standard mammograms or

More

The Physics and Technology of Mammography

The X-ray Beam Spectrum: One of the most unique features of mammography compared to other radiographic procedures is the x-ray beam spectrum that is used. A spectrum with relatively low photon energies is required to produce the high contrast sensitivity and is adjusted to specific breast conditions to optimize contrast with respect to ...

More

(PDF) Optimization of Tungsten X-Ray Spectra for Digital ...

In digital mammography, an alternative spectrum is preferable for breasts thicker than 2 cm" (Dance et al., 2000b). By using the already defined FoM for optimization (see eqn [1]), ...

More

Contrast-Enhanced Spectral Mammography

“A sequence of contrast mammography could be added, similar to the way contrast MRI might be added, staggered every six months, coming between standard digital mammography screenings.” MRI remains a viable option for women with irregular, uncertain mammograms, LeGrand says, but there’s the expense and level of patient discomfort as well ...

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Optimization of x-ray spectra in digital mammography ...

Mar 16, 2012  In digital mammography, the influence of x-ray spectra on image quality and dose to the breast has been studied using theoretical or experimental methods. Concerning the theoretical works, Fahrig and Yaffe ( 1994a, 1994b) developed an analytical model to study spectra optimization in digital mammography.

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Spectral shaping for photon counting digital mammography ...

Oct 01, 2007  Thus, the SQE is better suited for digital mammography since it quantifies the dose efficiency when using a given spectrum relative to using the optimal monochromatic energy. On the other hand it says little about the shape of the spectrum. To be feasible for mammography, the MPL filter must allow a photon flux comparable to existing systems.

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