Noise power spectrum analysis for several digital breast tomosynthesis reconstruction algorithms

2006 ◽  
Author(s):  
Ying Chen ◽  
Joseph Y. Lo ◽  
James T. Dobbins III
Keyword(s):  
Power Spectrum ◽  
Spectrum Analysis ◽  
Digital Breast Tomosynthesis ◽  
Power Spectrum Analysis ◽  
Noise Power ◽  
Noise Power Spectrum ◽  
Reconstruction Algorithms ◽  
Breast Tomosynthesis

A framework for noise-power spectrum analysis of multidimensional images

2002 ◽  
Vol 29 (11) ◽  
pp. 2655-2671 ◽  
Author(s):  
J. H. Siewerdsen ◽  
I. A. Cunningham ◽  
D. A. Jaffray
Keyword(s):  
Power Spectrum ◽  
Spectrum Analysis ◽  
Power Spectrum Analysis ◽  
Noise Power ◽  
Noise Power Spectrum ◽  
Multidimensional Images

Noise power spectrum analysis of a scanning microdensitometer

1988 ◽  
Vol 27 (16) ◽  
pp. 3468 ◽  
Author(s):  
Phillip C. Bunch ◽  
Richard Van Metter
Keyword(s):  
Power Spectrum ◽  
Spectrum Analysis ◽  
Power Spectrum Analysis ◽  
Noise Power ◽  
Noise Power Spectrum

Noise analysis of the turbojet and turbofan engine tests

2013 ◽  
Vol 228 (13) ◽  
pp. 2414-2423
Author(s):  
Jingjing Huang ◽  
Longxi Zheng
Keyword(s):  
Power Spectrum ◽  
Noise Reduction ◽  
Spectrum Analysis ◽  
Test Bench ◽  
Power Spectrum Analysis ◽  
Noise Power ◽  
Far Field ◽  
Turbofan Engine ◽  
Turbojet Engine ◽  
Field Noise

Aerogine noise leads to environment pollution largely when aerogine is tested. In this paper, the power spectrum analysis method of the aeroengine test noise was discussed, and the noise measurement and analysis experiments of a turbojet engine and a turbofan engine tests were carried out. The noise level, main noise resource, and noise characteristics of the two turbojet and turbofan engines were analyzed. Meanwhile, the indoor noise and far-field noise of the turbojet engine were both measured, the noise spread characteristics were analyzed and the noise reduction performance of the test bench was evaluated. The noise generated by the turbojet engine test had the discrete characteristic of high frequency. The higher frequencies when peak values occurred were the blade passage frequencies and the noises with lower frequencies were the broad band noises, especially the jet noise, and the maximum of the peak values occurred at the basic frequencies or harmonic frequencies of the compressor. Meanwhile, the noises generated by the turbofan engine, focused on the high frequencies and the peak values corresponded to the rotation noise of the fan blades. The experimental results were consistent with the theory basically, which indicated that the aeroengine operating status information could be identified by the noise power spectrum analysis. In addition to the aeroengine noise reduction research, the noise power spectrum analysis could also be used to diagnose the fault of the aeroengine structure and performance. On the other hand, the indoor and far-field noise measurement experimental results implied that the noise was suppressed from 136 dB to 85 dB and could provide the reference to the noise reduction design of the aeroengine test bench.

3D noise power spectrum applied on clinical MDCT scanners: effects of reconstruction algorithms and reconstruction filters

2011 ◽  
Author(s):  
Frédéric A. Miéville ◽  
Gregory Bolard ◽  
Mohamed Benkreira ◽  
Paul Ayestaran ◽  
François Gudinchet ◽  
...  
Keyword(s):  
Power Spectrum ◽  
Noise Power ◽  
Noise Power Spectrum ◽  
Reconstruction Algorithms

scholarly journals Power spectrum analysis of the x-ray scatter signal in mammography and breast tomosynthesis projections

2013 ◽  
Vol 40 (10) ◽  
pp. 101905 ◽  
Author(s):  
Ioannis Sechopoulos ◽  
Kristina Bliznakova ◽  
Baowei Fei
Keyword(s):  
Power Spectrum ◽  
Spectrum Analysis ◽  
Power Spectrum Analysis ◽  
Breast Tomosynthesis ◽  
X Ray
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