Search Results - "Gureyev, T. E"

Simultaneous phase and amplitude extraction from a single defocused image of a homogeneous object by Paganin, D., Mayo, S. C., Gureyev, T. E., Miller, P. R., Wilkins, S. W.

“…Summary We demonstrate simultaneous phase and amplitude extraction from a single defocused image of a homogeneous object. Subject to the assumptions explicitly…”
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Phase-contrast imaging using polychromatic hard X-rays by Wilkins, S. W, Gureyev, T. E, Gao, D, Pogany, A, Stevenson, A. W

“…IN conventional radiography, X-rays which pass through an object along different paths are differentially absorbed, and the intensity pattern of the emerging…”
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Phase-contrast imaging of weakly absorbing materials using hard X-rays by Davis, T. J, Gao, D, Gureyev, T. E, Stevenson, A. W, Wilkins, S. W

“…A method for enhancing the contrast in hard X-ray images of weakly absorbing materials by resolving phase variations across the X-ray beam is described. The…”
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Generalized eikonal of partially coherent beams and its use in quantitative imaging by GUREYEV, T. E, PAGANIN, D. M, STEVENSON, A. W, MAYO, S. C, WILKINS, S. W

“…The generalized eikonal of a partially coherent paraxial wave is introduced via a differential equation describing the evolution of the time-averaged…”
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Quantitative X‐ray projection microscopy: phase‐contrast and multi‐spectral imaging by Mayo, S. C., Miller, P. R., Wilkins, S. W., Davis, T. J., Gao, D., Gureyev, T. E., Paganin, D., Parry, D. J., Pogany, A., Stevenson, A. W.

“…Summary We outline a new approach to X‐ray projection microscopy in a scanning electron microscope (SEM), which exploits phase contrast to boost the quality…”
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Linear algorithms for phase retrieval in the Fresnel region by Gureyev, T.E, Pogany, A, Paganin, D.M, Wilkins, S.W

“…Linear methods for solving the problem of optical phase retrieval from intensity measurements have the advantage of being deterministic and computationally…”
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Composite techniques for phase retrieval in the Fresnel region by Gureyev, T.E.

“…In free-space propagation of optical beams, the linear contribution of the object-plane phase to the intensity distribution in the Fresnel region is described…”
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Linear algorithms for phase retrieval in the Fresnel region. 2. Partially coherent illumination by Gureyev, T.E., Nesterets, Ya.I., Paganin, D.M., Pogany, A., Wilkins, S.W.

“…Analytical expressions for the spatial distribution of the spectral density and intensity of projection images are derived for a broad class of object…”
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Dark-field signal extraction in propagation-based phase-contrast imaging by Gureyev, T E, Paganin, D M, Arhatari, B, Taba, S T, Lewis, S, Brennan, P C, Quiney, H M

“…A method for extracting the dark-field signal in propagation-based phase-contrast imaging is proposed. In the case of objects consisting predominantly of a…”
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On the evolution and relative merits of hard X-ray phase-contrast imaging methods by Wilkins, S. W., Nesterets, Ya. I., Gureyev, T. E., Mayo, S. C., Pogany, A., Stevenson, A. W.

“…This review provides a brief overview, albeit from a somewhat personal perspective, of the evolution and key features of various hard X-ray phase-contrast…”
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Relative roles of multiple scattering and Fresnel diffraction in the imaging of small molecules using electrons by Gureyev, T.E., Quiney, H.M., Kozlov, A., Allen, L.J.

“…•Multiple scattering has only a moderate effect in electron imaging of small molecules.•In-molecule Fresnel diffraction tends to have a significant…”
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Quantitative in-line phase-contrast imaging with multienergy X rays by Gureyev, T E, Mayo, S, Wilkins, S W, Paganin, D, Stevenson, A W

“…We present a new method for quantitative nondestructive characterization of objects by x-ray phase-contrast imaging. Spatial distributions of the projected…”
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Tomographic phase and attenuation extraction for a sample composed of unknown materials using x-ray propagation-based phase-contrast imaging by Alloo, S J, Paganin, D M, Morgan, K S, Gureyev, T E, Mayo, S C, Mohammadi, S, Lockie, D, Menk, R H, Arfelli, F, Zanconati, F, Tromba, G, Pavlov, K M

“…Propagation-based phase-contrast x-ray imaging (PB-PCXI) generates image contrast by utilizing sample-imposed phase-shifts. This has proven useful when imaging…”
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Imaging Breast Microcalcifications Using Dark-Field Signal in Propagation-Based Phase-Contrast Tomography by Aminzadeh, A., Arhatari, B. D., Maksimenko, A., Hall, C. J., Hausermann, D., Peele, A. G., Fox, J., Kumar, B., Prodanovic, Z., Dimmock, M., Lockie, D., Pavlov, K. M., Nesterets, Y. I., Thompson, D., Mayo, S. C., Paganin, D. M., Taba, S. T., Lewis, S., Brennan, P. C., Quiney, H. M., Gureyev, T. E.

“…Breast microcalcifications are an important primary radiological indicator of breast cancer. However, microcalcification classification and diagnosis may be…”
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Propagation‐based x‐ray phase‐contrast tomography of mastectomy samples using synchrotron radiation by Gureyev, T. E., Nesterets, Ya. I., Baran, P. M., Taba, S. T., Mayo, S. C., Thompson, D., Arhatari, B., Mihocic, A., Abbey, B., Lockie, D., Fox, J., Kumar, B., Prodanovic, Z., Hausermann, D., Maksimenko, A., Hall, C., Peele, A. G., Dimmock, M., Pavlov, K. M., Cholewa, M., Lewis, S., Tromba, G., Quiney, H. M., Brennan, P. C.

“…Purpose Propagation‐based phase‐contrast computed tomography (PB‐CT) is a method for three‐dimensional x‐ray imaging that utilizes refraction, as well as…”
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Optimization of propagation-based x-ray phase-contrast tomography for breast cancer imaging by Baran, P, Pacile, S, Nesterets, Y I, Mayo, S C, Dullin, C, Dreossi, D, Arfelli, F, Thompson, D, Lockie, D, McCormack, M, Taba, S T, Brun, F, Pinamonti, M, Nickson, C, Hall, C, Dimmock, M, Zanconati, F, Cholewa, M, Quiney, H, Brennan, P C, Tromba, G, Gureyev, T E

“…The aim of this study was to optimise the experimental protocol and data analysis for in-vivo breast cancer x-ray imaging. Results are presented of the…”
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Relative roles of multiple scattering and Fresnel diffraction in the imaging of small molecules using electrons, Part II: Differential Holographic Tomography by Gureyev, T.E., Quiney, H.M., Kozlov, A., Paganin, D.M., Schmalz, G., Brown, H.G., Allen, L.J.

“…•The proposed 3D reconstruction method, termed Differential Holographic Tomography, is developed theoretically.•The method is also demonstrated computationally…”
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X‐ray omni microscopy by PAGANIN, D., GUREYEV, T. E., MAYO, S. C., STEVENSON, A. W., NESTERETS, YA. I., WILKINS, S. W.

“…Summary The science of wave‐field phase retrieval and phase measurement is sufficiently mature to permit the routine reconstruction, over a given plane, of the…”
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Free propagation phase-contrast breast CT provides higher image quality than cone-beam breast-CT at low radiation doses: a feasibility study on human mastectomies by Pacilè, S., Dullin, C., Baran, P., Tonutti, M., Perske, C., Fischer, U., Albers, J., Arfelli, F., Dreossi, D., Pavlov, K., Maksimenko, A., Mayo, S. C., Nesterets, Y. I., Taba, S. Tavakoli, Lewis, S., Brennan, P. C., Gureyev, T. E., Tromba, G., Wienbeck, S.

“…In this study we demonstrate the first direct comparison between synchrotron x-ray propagation-based CT (PB-CT) and cone-beam breast-CT (CB-CT) on human…”
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On qualitative and quantitative analysis in analyser-based imaging by Nesterets, Ya. I., Coan, P., Gureyev, T. E., Bravin, A., Cloetens, P., Wilkins, S. W.

“…Using rigorous wave‐optical formalism, a general expression is obtained for the image intensity distribution in combined analyser‐based/propagation‐based…”
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