Dr. Walter M. Gibson Profile

Dr. Walter M. Gibson

Chief Technical Officer at X-Ray Optical Systems Inc

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Author

Publications (37)

Proceedings Article | 31 August 2005 Paper

X-ray optics: an enabling technology for science, medicine, and industry

W. Gibson, Z. Chen, N. Gao, H. Huang, T. Miller

Proceedings Volume 5918, 59180D (2005) https://doi.org/10.1117/12.625150

KEYWORDS: X-ray optics, Crystals, X-rays, Diffraction, Sensors, X-ray fluorescence spectroscopy, X-ray diffraction, Arsenic, Metals, Tissues

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Proceedings Article | 20 April 2005 Paper

Micro gamma camera optics with high sensitivity and resolution

C. MacDonald, Noor Mail, W. Gibson, S. Jorgenson, E. Ritman

Proceedings Volume 5745, (2005) https://doi.org/10.1117/12.597193

KEYWORDS: Collimators, Sensors, Image resolution, Radio optics, Capillaries, Cameras, X-ray optics, Glasses, Signal to noise ratio, X-rays

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Proceedings Article | 3 November 2004 Paper

Potential application of doubly curved crystal optics

Noor Mail, Carolyn MacDonald, Ze Wu Chen, Walter Gibson

Proceedings Volume 5537, (2004) https://doi.org/10.1117/12.563286

KEYWORDS: Silicon, Lead, Arsenic, Copper, X-ray fluorescence spectroscopy, Semiconducting wafers, X-ray optics, Crystals, X-rays, Luminescence

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Proceedings Article | 30 December 2003 Paper

Convergent beam neutron crystallography

Walter Gibson, Arthur Schultz, James Richardson, John Carpenter, David Mildner, Heather Chen-Mayer, M. Miller, E. Maxey, Henry Prask, Thomas Gnaeupel-Herold, Russell Youngman

Proceedings Volume 5199, (2003) https://doi.org/10.1117/12.510736

KEYWORDS: Diffraction, Crystals, Sensors, Crystallography, Single crystal X-ray diffraction, Laser crystals, Proteins, Channel projecting optics, Integrated optics, Optical testing

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Proceedings Article | 18 November 2002 Paper

Monolithic polycapillary focusing optic for polychromatic neutron diffraction applications

David Mildner, Huaiyu Chen-Mayer, Walter Gibson, Arthur Schultz

Proceedings Volume 4785, (2002) https://doi.org/10.1117/12.452286

KEYWORDS: Diffraction, Crystals, Sensors, Channel projecting optics, Laser crystals, Capillaries, Glasses, Optical alignment, Crystal optics, Quartz

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Proceedings Article | 23 October 2002 Paper

Polycapillary optics beam divergence

Huapeng Huang, Walter Gibson, Igor Ponomarev, Russell Youngman

Proceedings Volume 4781, (2002) https://doi.org/10.1117/12.450606

KEYWORDS: X-ray optics, X-rays, Optical testing, Copper, Proteins, Crystallography, Silicon, Semiconducting wafers, Diffraction, Channel projecting optics

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Proceedings Article | 23 October 2002 Paper

Potential for radioscintography with polycapillary optics

Walter Gibson, Carolyn MacDonald, Noor Mail

Proceedings Volume 4781, (2002) https://doi.org/10.1117/12.453746

KEYWORDS: Photons, Radio optics, Sensors, Spatial resolution, Prostate, Image filtering, Lead, X-ray optics, Tumors, Image sensors

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Proceedings Article | 23 October 2002 Paper

Molybdenum microfocus source coupling to polycapillary optics for powder diffraction

Noor Mail, Walter Gibson, Carolyn MacDonald

Proceedings Volume 4781, (2002) https://doi.org/10.1117/12.453744

KEYWORDS: Diffraction, Molybdenum, Copper, Sensors, X-ray optics, Silicon, Geometrical optics, Collimators, Optical testing, Solids

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Proceedings Article | 6 December 2001 Paper

New capabilities and applications of compact source-optic combinations

Tom Bievenue, Jay Burdett, Zewu Chen, Ning Gao, David Gibson, Walter Gibson, Huapeng Huang, Igor Ponomarev

Proceedings Volume 4502, (2001) https://doi.org/10.1117/12.449854

KEYWORDS: X-rays, X-ray optics, Crystals, Crystal optics, X-ray sources, Sensors, X-ray diffraction, Diffraction, Capillaries, Optical fibers

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Proceedings Article | 6 December 2001 Paper

Polycapillary optics for powder diffraction

Huapeng Huang, Carolyn MacDonald, Walter Gibson, John Chik, Adrian Parsegian, Igor Ponomarev

Proceedings Volume 4502, (2001) https://doi.org/10.1117/12.449857

KEYWORDS: Diffraction, X-ray optics, Collimators, X-rays, X-ray diffraction, X-ray sources, Optical design, Crystallography, Copper, Reflection

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Proceedings Article | 6 December 2001 Paper

Improved radiography with polycapillary x-ray optics

Carolyn MacDonald, Francisca Sugiro, Walter Gibson

Proceedings Volume 4502, (2001) https://doi.org/10.1117/12.449871

KEYWORDS: X-ray optics, Crystals, Optics manufacturing, X-rays, Capillaries, Spatial resolution, Sensors, Radio optics, Optical testing, Laser crystals

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Polycapillary x-ray optics provide an innovative new way to control x-ray beams. Placing these optics after the object to be imaged provides very efficient rejection of Compton scatter, while allowing image magnification without loss of resolution, image demagnification, or image shaping to match with digital detectors. An extensive study of the effects of surface and profile defects have greatly enhanced the understanding of the manufacturing process and lead to improved reproducibility and manufacturability of the optics. Measurements were performed on magnifying tapers. The optics had measured primary transmissions greater than 50% and scatter transmission of less than 1%. For a 5-cm thick Lucite phantom, this resulted in a contrast enhancement compared to a conventional grid of nearly a factor of two. The magnification from the tapered capillary optics improved the MTF at all frequencies out to 1.9 times the original system resolution. Increases below the system resolution are most important because clinically relevant structures generally occupy lower spatial frequencies. Alternatively, placing a collimating optic and diffracting crystal before the patient provides sufficient monochromatic beam intensity for medical imaging. Contrast, resolution, and intensity measurements were performed with both high and low angular acceptance crystals. At 8 keV, contrast enhancement was a factor of 5 relative to the polychromatic case, in good agreement with theoretical values. At 17.5 keV, monochromatic subject contrast was more than a factor of 2 times greater than the conventional polychromatic contrast. An additional factor of two increase in contrast is expected from the removal of scatter obtained from using the air gap which is allowable from the parallel beam. The measured angular resolution after the crystal was 0.4 mrad for a silicon crystal. The realization of these applications has been advanced by the recent marked improvement in available optic quality and reproducibility. Manufacturing progress has been assisted by the development of simulation analyses which allow for increasingly accurate assessment of optics defects. Optics performance over the whole range of energy from 10 to 80 keV can often be matched with one or two fitting parameters. Continuing optics manufacturing challenges include the advance of applications at energies above 40 keV and the production of optics for imaging which are of adequate clinical size. Multioptic jigs designed to increase imaging area have been tested.

Proceedings Article | 28 June 2001 Paper

Contrast enhancement measurement using polycapillary x-ray optics at 20 to 40 keV

Padiyar Cari, - Suparmi, Walter Gibson, Carolyn MacDonald

Proceedings Volume 4320, (2001) https://doi.org/10.1117/12.430941

KEYWORDS: Sensors, Lead, Scatter measurement, Radio optics, Channel projecting optics, Glasses, X-ray optics, Geometrical optics, Optical testing, X-rays

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Proceedings Article | 2 November 2000 Paper

Development of polycapillary x-ray optics for scatter rejection

- Suparmi, Padiyar Cari, Walter Gibson, Carolyn MacDonald

Proceedings Volume 4144, (2000) https://doi.org/10.1117/12.405895

KEYWORDS: Optical fibers, Glasses, X-ray optics, Optics manufacturing, X-rays, Capillaries, Lead, Biomedical optics, Absorption, Geometrical optics

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Proceedings Article | 2 November 2000 Paper

Characterization of a long-focal-length polycapillary optic for high-energy x-rays

Padiyar Cari, - Suparmi, Sushil Padiyar, Walter Gibson, Carolyn MacDonald, Cheryl Alexander, Marshall Joy, Christine Russell, Zewu Chen

Proceedings Volume 4144, (2000) https://doi.org/10.1117/12.405898

KEYWORDS: Optical fibers, Sensors, X-rays, Glasses, X-ray optics, Optical simulations, Lead, Geometrical optics, Prototyping, X-ray detectors

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Proceedings Article | 2 November 2000 Paper

Low-power protein crystallography using polycapillary optics

Huapeng Huang, Carolyn MacDonald, Walter Gibson, D. Carter, J. Ho, J. Ruble, Igor Ponomarev

Proceedings Volume 4144, (2000) https://doi.org/10.1117/12.405885

KEYWORDS: Proteins, X-ray optics, Crystallography, Diffraction, X-rays, Crystals, Software development, Optical design, Optics manufacturing, Nickel

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Proceedings Article | 23 November 1999 Paper

Characterization of multifiber polycapillary x-ray collimating optics

Sushil Padiyar, Hui Wang, Mikhail Gubarev, Walter Gibson, Carolyn MacDonald

Proceedings Volume 3767, (1999) https://doi.org/10.1117/12.371106

KEYWORDS: Optical fibers, X-ray optics, X-rays, Lead, Channel projecting optics, Chlorine, Geometrical optics, X-ray characterization, Photon transport, Reflectivity

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Proceedings Article | 23 November 1999 Paper

Diffraction geometry optimization with polycapillary x-ray optics

Walter Gibson, Carolyn MacDonald, Johannes Ullrich

Proceedings Volume 3767, (1999) https://doi.org/10.1117/12.371117

KEYWORDS: Diffraction, X-ray optics, Crystals, Collimation, X-rays, Proteins, Optical fibers, Sensors, Optical testing, Copper

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Proceedings Article | 23 November 1999 Paper

Potential of polycapillary optics for hard x-ray medical imaging applications

Lei Wang, Walter Gibson, Carolyn MacDonald

Proceedings Volume 3767, (1999) https://doi.org/10.1117/12.371107

KEYWORDS: Capillaries, Optical fibers, X-ray optics, Lead glass, Lenses, Signal to noise ratio, Prototyping, X-rays, Biomedical optics, Radio optics

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Proceedings Article | 19 November 1998 Paper

X-ray capillary system for hard x-ray astronomy

Mikhail Gubarev, Cheryl Bankston, Marshall Joy, Jeffery Kolodziejczak, Carolyn MacDonald, Christine Russell, Walter Gibson

Proceedings Volume 3444, (1998) https://doi.org/10.1117/12.331264

KEYWORDS: X-rays, X-ray optics, Solar concentrators, Sensors, Collimators, Prototyping, Capillaries, X-ray sources, X-ray detectors, Energy efficiency

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Proceedings Article | 19 November 1998 Paper

Simulation study of polycapillary x-ray optics

Hui Wang, Lei Wang, Walter Gibson, Carolyn MacDonald

Proceedings Volume 3444, (1998) https://doi.org/10.1117/12.331286

KEYWORDS: X-ray optics, Optical fibers, Capillaries, X-rays, Data modeling, Glasses, X-ray astronomy, Optical simulations, Computer simulations, Optics manufacturing

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Proceedings Article | 11 July 1997 Paper

Application of polycapillary optics to hard x-ray astronomy

Christine Russell, Walter Gibson, Mikhail Gubarev, F. Hofmann, Marshall Joy, Carolyn MacDonald, Lei Wang, Qi-Fan Xiao, Russell Youngman

Proceedings Volume 3113, (1997) https://doi.org/10.1117/12.278868

KEYWORDS: Optical fibers, X-ray optics, Photons, Sensors, X-ray astronomy, Capillaries, X-rays, Astronomical imaging, Prototyping, Astronomy

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Proceedings Article | 7 July 1997 Paper

Measurements of a prototype CdZnTe array for direct digital mammography

C. Freinberg-Trufas, Walter Gibson, Scott Owens, Christine Russell, Carolyn MacDonald, F. Doty

Proceedings Volume 3115, (1997) https://doi.org/10.1117/12.277682

KEYWORDS: Sensors, X-ray optics, X-rays, X-ray detectors, Prototyping, Digital mammography, Quantum efficiency, Visible radiation, Photons, Electronics

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Proceedings Article | 19 July 1996 Paper

Application of monolithic polycapillary focusing optics in MXRF

Ning Gao, Igor Ponomarev, Qi-Fan Xiao, Walter Gibson, D. Carpenter

Proceedings Volume 2859, (1996) https://doi.org/10.1117/12.245134

KEYWORDS: X-ray optics, Copper, Geometrical optics, Optical components, X-ray sources, X-rays, Optics manufacturing, Capillaries, Iron, Channel projecting optics

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Proceedings Article | 19 July 1996 Paper

Polycapillary optics: status, limitations, and prospects

Robert Downing, Walter Gibson, Carolyn MacDonald

Proceedings Volume 2859, (1996) https://doi.org/10.1117/12.245135

KEYWORDS: X-ray optics, X-rays, Optics manufacturing, Capillaries, X-ray lithography, Crystals, X-ray diffraction, Proteins, Radio optics, X-ray imaging

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Proceedings Article | 19 July 1996 Paper

Analysis of capillary optic performance for hard x rays

Lei Wang, Bimal Rath, Walter Gibson, John Kimball, Carolyn MacDonald

Proceedings Volume 2859, (1996) https://doi.org/10.1117/12.245138

KEYWORDS: Capillaries, X-rays, X-ray optics, Glasses, Reflection, Geometrical optics, Chlorine, Optical simulations, Reflectivity, Analytical research

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Proceedings Article | 19 July 1996 Paper

Polycapillary x-ray optics for macromolecular crystallography

Scott Owens, Johannes Ullrich, Igor Ponomarev, D. Carter, R. Sisk, J. Ho, Walter Gibson

Proceedings Volume 2859, (1996) https://doi.org/10.1117/12.245141

KEYWORDS: X-ray optics, Collimators, Crystals, X-rays, Crystallography, Laser crystals, X-ray diffraction, X-ray sources, Optical filters, Optics manufacturing

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Proceedings Article | 18 September 1995 Paper

Investigation of glass polycapillaries for use in proximity x-ray lithography

Ira Klotzko, Qi-Fan Xiao, David Gibson, Robert Downing, Walter Gibson, Andrei Karnaukhov, Chris Jezewski

Proceedings Volume 2523, (1995) https://doi.org/10.1117/12.220993

KEYWORDS: Capillaries, Collimators, X-ray lithography, X-rays, Lithography, Optical fibers, Glasses, Semiconductors, X-ray sources, X-ray optics

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Proceedings Article | 15 June 1995 Paper

Effects of intense x-ray radiation on polycapillary fiber performance

Bimal Rath, D. Aloisi, Donald Bilderback, Ning Gao, Walter Gibson, F. Hofmann, B. Homan, Chris Jezewski, Ira Klotzko, J. Mitchell, Scott Owens, Johannes Ullrich, Lei Wang, Gregory Wells, Qi-Fan Xiao, Carolyn MacDonald

Proceedings Volume 2519, (1995) https://doi.org/10.1117/12.211907

KEYWORDS: X-rays, Annealing, In situ metrology, Capillaries, Photons, Glasses, X-ray optics, Synchrotrons, Synchrotron radiation, Reflectivity

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Proceedings Article | 15 June 1995 Paper

Medical applications of polycapillary x-ray optics

Carolyn MacDonald, Walter Gibson

Proceedings Volume 2519, (1995) https://doi.org/10.1117/12.211905

KEYWORDS: X-ray optics, X-rays, Photons, Capillaries, Mammography, X-ray imaging, Cancer, Prototyping, Absorption, Breast cancer

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Proceedings Article | 15 June 1995 Paper

Application of a multifiber collimating lens to thin film structure analysis

- Kardiawarman, Brian York, Xaio Wen Qian, Qi-Fan Xiao, Carolyn MacDonald, Walter Gibson

Proceedings Volume 2519, (1995) https://doi.org/10.1117/12.211906

KEYWORDS: X-rays, Capillaries, Diffraction, Thin films, Reflection, Crystals, Silicon, Lens design, Monochromators, X-ray sources

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Proceedings Article | 11 November 1994 Paper

Charge injection device detectors for x-ray imaging

Robert Wentink, Joseph Carbone, D. Aloisi, Walter Gibson, Carolyn MacDonald, Q. Hanley, Robert Fields, M. Bonner Denton

Proceedings Volume 2279, (1994) https://doi.org/10.1117/12.193175

KEYWORDS: Sensors, X-rays, X-ray imaging, Electrodes, Imaging systems, Charge-coupled devices, Electrons, X-ray optics, Nondestructive evaluation, Visible radiation

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Proceedings Article | 12 July 1994 Paper

Characterization of a multifiber polycapillary-based x-ray collimating lens

A. Kardiawarman, Vladimir Kovantsev, S. Budkov, Walter Gibson, T. Hayes, L. Lurio, Carolyn MacDonald, Peter Persans, Qi-Fan Xiao

Proceedings Volume 2278, (1994) https://doi.org/10.1117/12.180018

KEYWORDS: X-rays, Capillaries, Crystals, X-ray detectors, Ultraviolet detectors, Solids, Lens design, Diffraction, X-ray optics, X-ray diffraction

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Proceedings Article | 12 July 1994 Paper

Polycapillary Kumakhov optics: a status report

Walter Gibson, Carolyn MacDonald

Proceedings Volume 2278, (1994) https://doi.org/10.1117/12.180010

KEYWORDS: X-ray optics, X-rays, Capillaries, Optical fibers, X-ray detectors, Prototyping, Ultraviolet detectors, Diffraction, Radio optics, Channel projecting optics

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Proceedings Article | 12 July 1994 Paper

Development of monolithic capillary optics for x-ray diffraction applications

Johannes Ullrich, Igor Ponomarev, Mikhail Gubarev, Ning Gao, Qi-Fan Xiao, Walter Gibson

Proceedings Volume 2278, (1994) https://doi.org/10.1117/12.180009

KEYWORDS: X-rays, X-ray optics, Capillaries, X-ray diffraction, Diffraction, Proteins, X-ray detectors, Prototyping, Ultraviolet detectors, Crystals

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Proceedings Article | 1 February 1994 Paper

Quantitative measurements of the performance of capillary x-ray optics

Carolyn MacDonald, Carmen Abreu, S. Budkov, Huaiyu Chen, X. Fu, Walter Gibson, A. Kardiawarman, Andrei Karnaukhov, Vladimir Kovantsev, Igor Ponomarev, Bimal Rath, Johannes Ullrich, Michael Vartanian, Qi-Fan Xiao

Proceedings Volume 2011, (1994) https://doi.org/10.1117/12.167239

KEYWORDS: Optical fibers, X-rays, X-ray optics, Capillaries, X-ray sources, Glasses, Synchrotrons, Computer simulations, Solids, X-ray lithography

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Proceedings Article | 3 February 1993 Paper

Applications of x-ray and neutron capillary optics

Walter Gibson, Muradin Kumakhov

Proceedings Volume 1736, (1993) https://doi.org/10.1117/12.140473

KEYWORDS: X-rays, Capillaries, X-ray optics, X-ray detectors, Synchrotrons, Physics, Angiography, X-ray sources, Optical fibers, X-ray lithography

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Proceedings Article | 20 January 1993 Paper

Concentration of synchrotron radiation with capillary arrays

Vladimir Arkadiev, Muradin Kumakhov, Walter Gibson

Proceedings Volume 1740, (1993) https://doi.org/10.1117/12.138706

KEYWORDS: X-rays, Capillaries, X-ray optics, Synchrotron radiation, Beam shaping, Synchrotrons, Grazing incidence, Computer simulations, Radiation effects, Prototyping

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Showing 5 of 37 publications

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