A New Consideration of Diffraction Computed Tomography for Breast Imaging: Studies in Phantoms and Patients

André, Michael P.; Martin, Peter; Otto, Gregory P.; Olson, Linda K.; Barrett, Todd K.; Spivey, Brett A.; Palmer, Doug

doi:10.1007/978-1-4615-1943-0_40

Cited by 37 publications

(12 citation statements)

References 8 publications

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“…The work The ultrasonic diffraction data used in this test were provided by ThermoTrex Corporation, which has developed an ultrasound computer tomography device for medical imaging applications. 5 The ultrasonic sensor system is composed of 1024-acoustic transducers arranged in a 20-cm-diam cylindrical array at half-wavelength spacing ͑Fig. 8͒.…”

Section: Acoustic Tomographymentioning

confidence: 99%

Optical signal processing at Essex Corporation

Franklin¹

1996

Opt. Eng

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The most current research and development in optical signal processing and its applications at Essex Corporation is summarized. In progress for more than a decade, this work has evolved from the development of highly specialized algorithms for the intelligence community to more general domains embracing such diverse areas as radar signal processing, medical ultrasound and magnetic resonance imaging, acoustic tomography, and cellular and satellite communications. Essex develops algorithms and designs, fabricates, and tests breadboard designs and transforms these into rugged, compact products for use in harsh environments. Descriptions of the most important investigations in these areas are presented. An image synthesizer called ImSyn™ is described that forms images from the measured spatial Fourier components of the object to be imaged. Applications to synthetic aperture radar, acoustic tomography, medical resonance imaging, and synthetic aperture microscopy are shown. An acousto-optic radar signal processor is described that can produce high-resolution, high-dynamic range rangeDoppler maps from instantaneously wideband radar returns. A design for a fiber optic true-time delay beamformer is presented. Finally, an optoelectronic telecommunications switch is discussed.

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Section: Acoustic Tomographymentioning

confidence: 99%

Optical signal processing at Essex Corporation

Franklin¹

1996

Opt. Eng

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“…There are numerous potential applications of DT that can be found in various scientific fields (Andre et al, 1995;Tabbara et al, 1988;Mueller et al, 1979;Kino, 1979;Devaney, 1984;Robinson, 1984). Recently, there has also been considerable interest in using DT to perform coherent x-ray imaging using third-generation synchrotron sources (Cheng and Han, 2001).…”

Section: Introductionmentioning

confidence: 98%

Numerically robust minimal‐scan reconstruction algorithms for diffraction tomography via radon transform inversion

Anastasio

Pan

2002

Int J Imaging Syst Tech

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ABSTRACT:It is widely believed that measurements from a full angular range of 2 are generally required to exactly reconstruct a complex-valued refractive index distribution in diffraction tomography (DT). In this work, we developed a new class of minimal-scan reconstruction algorithms for DT that utilizes measurements only over the angular range 0 Յ Յ 3/2 to perform an exact reconstruction. These algorithms, referred to as minimal-scan estimate-combination (MS-E-C) reconstruction algorithms, effectively operate by transforming the DT reconstruction problem into a conventional x-ray CT reconstruction problem that requires inversion of the Radon transform. We performed computer simulations to compare the noise and numerical properties of the MS-E-C algorithms against existing filtered backpropagation-based algorithms.

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“…It is therefore necessary to use suitable data acquisition strategies (backscattering, transmission and/or diffraction) in order to determine howt om odel the forward problem and solvethe inverse problem. UCT methods, which were first developed for use with soft biological tissues, have been studied by several authors [15,16,17,18,19,20,21]. With tissues of this kind, the wave equation is linearized using the Born approximation, which consists in taking the incident field instead of the total field at every inter-©S.Hirzel Verlag · EAA nal point on the object (i.e., the scatterer).…”

Section: Introductionmentioning

confidence: 99%

Travel-Time Ultrasonic Computed Tomography Applied to Quantitative 2-D Imaging of Standing Trees: A Comparative Numerical Modeling Study

Arciniegas¹,

Brancheriau²,

Gallet³

et al. 2014

Acta Acustica united with Acustica

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International audienceThe quality of the Ultrasonic Computed Tomography (UCT) imaging device, in term of spatial resolution, sensitivity or dynamic, is a function of the wavelength, the number of transducers, the ultrasonic field generated and the inversion algorithm. This latter factor was studied using four inversion techniques for the tomography of trees. Two new methods, Partial Least Squares method - PLS, and Layer Stripping - LS, are compared to two classical methods, Filtered Backprojection - FBP, and Simultaneous Iterative Reconstruction Technique - SIRT. An original numerical phantom of tree was used and the effects of the variation of the number of transducers and the noise level were analyzed. The PLS was found to converge slowly but reached a high performance for the reconstruction of the projection values (slowness). PLS method was also characterized by a fast computation time. However, the PLS method gave a poor image quality (high sensitivity to noise level and presence of outlier values). The main advantage of the LS method was its high robustness to the noise level. The computing time was however the weakest point of LS method. A combination of the two classic FBP-SIRT methods seemed the most suitable except for the computation time. However, an improvement of the convergence conditions of PLS method (very fast computing time; including also curved rays), with the use of SIRT method, would constitute a promising solution

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A New Consideration of Diffraction Computed Tomography for Breast Imaging: Studies in Phantoms and Patients

Cited by 37 publications

References 8 publications

Optical signal processing at Essex Corporation

Optical signal processing at Essex Corporation

Numerically robust minimal‐scan reconstruction algorithms for diffraction tomography via radon transform inversion

Travel-Time Ultrasonic Computed Tomography Applied to Quantitative 2-D Imaging of Standing Trees: A Comparative Numerical Modeling Study

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