Prof. Michael E. Gehm Profile

Prof. Michael E. Gehm

Professor of ECE and Physics at Duke Univ

SPIE Involvement:

Conference Chair | Editor | Author

Area of Expertise:

Computational Sensing , Spectroscopy , Optical and Atomic Physics

Publications (55)

Proceedings Article | 7 June 2024 Presentation + Paper

Further development of asymmetric illumination x-ray differential phase contrast imaging

Sarah Ruiz, Michael Gehm

Proceedings Volume 13043, 130430H (2024) https://doi.org/10.1117/12.3013524

KEYWORDS: X-rays, Light sources and illumination, X-ray imaging, Phase contrast, Sensors, Refraction

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Proceedings Article | 7 June 2024 Presentation + Paper

Spectrally responsive edge-illumination x-ray phase contrast imaging (XPCI)

Ava Hurlock, Sarah Ruiz, Timothy Koh, Michael Gehm

Proceedings Volume 13043, 130430F (2024) https://doi.org/10.1117/12.3013285

KEYWORDS: X-rays, Sensors, X-ray imaging, Signal attenuation, Phase contrast, Refraction, Light sources and illumination, Attenuation

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Proceedings Article | 3 October 2023 Presentation + Paper

Towards creation of an asymmetric vision environment

A. Stohn, M. Boyarsky, M. Martinez, M. Gehm

Proceedings Volume 12693, 1269302 (2023) https://doi.org/10.1117/12.2677128

KEYWORDS: Aerosols, Atmospheric particles, Scattering, Absorption, Design and modelling, Matrices, Light scattering, Multiple scattering

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Proceedings Article | 3 October 2023 Presentation + Paper

Imaging asymmetry in the presence of a bright interferent

M. Martinez, A. Stohn, M. Gehm

Proceedings Volume 12693, 126930S (2023) https://doi.org/10.1117/12.2676892

KEYWORDS: Clouds, Visibility, Aerosols, Atmospheric modeling, Light scattering, Radiative transfer, Multiple scattering, Scattering

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Proceedings Article | 14 June 2023 Presentation + Paper

Simulation and information-theoretic analysis of hybrid CT+XRD imaging system

Sarah Ruiz, Ava Hurlock, Shu Yang, Mauricio Martinez, Ratchaneekorn Thamvichai, Joel Greenberg, Amit Ashok, Michael Gehm

Proceedings Volume 12531, 125310A (2023) https://doi.org/10.1117/12.2664066

KEYWORDS: Photon counting, Imaging systems, X-ray computed tomography, X-ray diffraction, Computed tomography, Device simulation, Computer simulations, X-ray imaging, Tungsten, Data acquisition

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Proceedings Article | 14 June 2023 Presentation + Paper

Performance of a high-throughput full-tunnel XRD checked baggage scanning system

David Coccarelli, Colt Dudley, Daniel Pike, Robert Greenberg, Ryan Moody, Edward Franco, Turner Richmond, Anuj Kapadia, Michael Gehm, Joel Greenberg

Proceedings Volume 12531, 1253103 (2023) https://doi.org/10.1117/12.2664253

KEYWORDS: X-ray diffraction, X-ray computed tomography, X-rays, Imaging systems, Explosives, X-ray detectors, Scanners, Radiography, Information security, Explosives detection

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Proceedings Article | 14 June 2023 Presentation + Paper

Asymmetric illumination x-ray differential phase contrast imaging

Sarah Ruiz, Mauricio Martinez, Michael Gehm

Proceedings Volume 12531, 125310I (2023) https://doi.org/10.1117/12.2663925

KEYWORDS: X-rays, Phase contrast, Light sources and illumination, X-ray imaging, Biological imaging, Tunable filters, Signal intensity, Signal attenuation, Polymethylmethacrylate, Signal detection

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Proceedings Article | 14 June 2023 Presentation + Paper

Spectrally responsive edge illumination x-ray phase contrast imaging (XPCI)

Ava Hurlock, Timothy Koh, Mauricio Martinez, Michael Gehm

Proceedings Volume 12531, 125310F (2023) https://doi.org/10.1117/12.2663798

KEYWORDS: X-rays, Refraction, X-ray imaging, Phase contrast, Attenuation

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Proceedings Article | 13 June 2022 Presentation

Flexible rapid x-ray simulation for large-scale synthetic data generation across a variety of x-ray modalities

David Coccarelli, Michael Gehm, Joel Greenberg

Proceedings Volume PC12104, PC1210403 (2022) https://doi.org/10.1117/12.2618945

KEYWORDS: X-rays, 3D modeling, Computer simulations, Virtual reality, Systems modeling, Ray tracing, Particle physics, Interfaces, Computing systems, Computer architecture

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Proceedings Article | 13 June 2022 Presentation

Inline hybrid CT + XRD for full-tunnel baggage scanning and false alarm reduction

Joel Greenberg, Joshua Carpenter, Alan Kruger, Colt Dudley, Matthew Foster, Ryan Moody, Michael Gehm, David Coccarelli, Anuj Kapadia

Proceedings Volume PC12104, PC1210405 (2022) https://doi.org/10.1117/12.2619022

KEYWORDS: X-ray computed tomography, X-ray diffraction, Weapons, Inspection, System integration, Scanners, Explosives, Data acquisition

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Proceedings Article | 3 June 2022 Presentation + Paper

Characterization of photon counting detectors for x-ray diffraction (XRD) applications

Sarah Ruiz, Zachary Gude, Ava Hurlock, Kyle Ferguson, Casey Miller, Joshua Carpenter, Joel Greenberg, Michael Gehm

Proceedings Volume 12104, 121040A (2022) https://doi.org/10.1117/12.2618954

KEYWORDS: Sensors, Photon counting, Quantum efficiency, X-rays, X-ray diffraction, X-ray detectors, X-ray computed tomography, Sensor performance, Imaging systems

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Proceedings Article | 3 June 2022 Presentation + Paper

Spectrally responsive edge-illumination (SREI) x-ray phase contrast imaging (XPCI)

Ava Hurlock, Sarah Ruiz, Joshua Carpenter, Joel Greenberg, Michael Gehm

Proceedings Volume 12104, 121040D (2022) https://doi.org/10.1117/12.2618827

KEYWORDS: Refraction, X-rays, X-ray imaging, Signal detection, Phase contrast, Signal attenuation, Refractive index, Absorption

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Proceedings Article | 12 April 2021 Paper

Design and analysis of a hybrid x-ray transmission and diffraction system

Joel Greenberg, Josh Carpenter, David Coccarelli, Yijun Ding, Shu Yang, Emily Fang, Kris Brumbaugh, Christopher Gregory, Amit Ashok, Anuj Kapadia, Michael Gehm

Proceedings Volume 11738, 1173807 (2021) https://doi.org/10.1117/12.2585640

KEYWORDS: Diffraction, X-rays, X-ray diffraction, Imaging systems, Medical diagnostics, Inspection, Information security, Explosives detection, Explosives

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Proceedings Article | 1 June 2020 Paper

Task-specific information in x-ray diffraction and transmission modalities: a comparative analysis

Yijun Ding, David Coccarelli, Ava Hurlock, Joel Greenberg, Michael Gehm, Amit Ashok

Proceedings Volume 11404, 114040H (2020) https://doi.org/10.1117/12.2558267

KEYWORDS: Scattering, Sensors, X-ray diffraction, X-rays, Scatter measurement, Photon counting, X-ray detectors, Signal to noise ratio, Signal attenuation, Photodetectors

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Proceedings Article | 19 May 2020 Paper

Modeling realistic virtual objects within a high-throughput x-ray simulation framework

David Coccarelli, Michael Gehm, Joel Greenberg

Proceedings Volume 11404, 1140402 (2020) https://doi.org/10.1117/12.2558947

KEYWORDS: X-rays, Virtual reality, Systems modeling, Radiography, Computer aided design, Scanners, Monte Carlo methods, Detection and tracking algorithms, Sensors, Reconstruction algorithms

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Proceedings Article | 27 April 2020 Presentation

X-ray diffraction texture: features for material identification (Conference Presentation)

Joshua Carpenter, Dean Hazineh, Michael Gehm, Joel Greenberg

Proceedings Volume 11404, 114040J (2020) https://doi.org/10.1117/12.2560077

KEYWORDS: Crystals, Modulation, X-ray diffraction, X-rays, Medical research, Computer security, Data acquisition, Volume rendering, Image classification, Analytics

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SPIE Journal Paper | 3 December 2019

Resolution and sampling analysis in digital in-line holography with spherical wave illumination

Wenhui Zhang, Hao Zhang, Liangcai Cao, Michael Gehm, Qiang Jiang, David Brady, Guofan Jin

OE, Vol. 59, Issue 10, 102402, (December 2019) https://doi.org/10.1117/12.10.1117/1.OE.59.10.102402

KEYWORDS: Spherical lenses, Holography, Holograms, Sensors, Digital holography, Image resolution, 3D image reconstruction, Optical engineering, Optical simulations, Optical resolution

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Proceedings Article | 17 May 2019 Paper

Using inkjet 3D printing to create contrast-enhanced textured physical phantoms for CT

Hope Pegues, John Knudsen, Huayu Tong, Michael Gehm, Benjamin Wiley, Ehsan Samei, Joseph Lo

Proceedings Volume 10948, 109484Z (2019) https://doi.org/10.1117/12.2512890

KEYWORDS: Signal attenuation, Tissues, Printing, Liver, Computed tomography, 3D printing, Imaging systems, Sodium, Nonimpact printing, Opacity

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Proceedings Article | 14 May 2019 Presentation + Paper

Simulation-based x-ray system design and analysis: past, present, and future

Michael Gehm

Proceedings Volume 10999, 1099902 (2019) https://doi.org/10.1117/12.2518919

KEYWORDS: X-rays, Sensors, Systems modeling, Computer simulations, X-ray sources

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Proceedings Article | 14 May 2019 Presentation

Information-theoretic analysis of fixed Gantry x-ray computed tomography transmission system for threat detection (Conference Presentation)

Jay Voris, Yijun Ding, Ratchaneekorn Thamvichai, Joel Greenberg, David Coccarelli, Michael Gehm, Eric Johnson, Carl Bosch, Amit Ashok

Proceedings Volume 10999, 109990I (2019) https://doi.org/10.1117/12.2519812

KEYWORDS: X-ray computed tomography, Computing systems

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Proceedings Article | 14 May 2019 Paper

Motivations and methods for the analysis of multi-modality x-ray systems for explosives detection

Joshua Carpenter, Yijun Ding, Ava Hurlock, David Coccarelli, Chris Gregory, Souleymane Diallo, Amit Ashok, Michael Gehm, Joel Greenberg

Proceedings Volume 10999, 1099908 (2019) https://doi.org/10.1117/12.2518781

KEYWORDS: X-rays, Scanners, Signal attenuation, X-ray diffraction, Explosives detection, Imaging systems, Data modeling

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Proceedings Article | 14 May 2019 Presentation + Paper

Modeling real world system geometry and detector response within a high-throughput x-ray simulation framework

David Coccarelli, Ava Hurlock, Camen Royse, Joshua Carpenter, Joel Greenberg, Eric Johnson, Carl Bosch, Michael Gehm

Proceedings Volume 10999, 1099906 (2019) https://doi.org/10.1117/12.2518870

KEYWORDS: Sensors, X-rays, Signal attenuation, Systems modeling, Scanners, X-ray detectors, Solids, Data modeling, Electromagnetic simulation, Computer simulations

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SPIE Journal Paper | 22 March 2019 Open Access

Three-dimensionally-printed anthropomorphic physical phantom for mammography and digital breast tomosynthesis with custom materials, lesions, and uniform quality control region

Andrea Rossman, Matthew Catenacci, Christine Zhao, Dhiraj Sikaria, John Knudsen, Danielle Dawes, Michael Gehm, Ehsan Samei, Benjamin Wiley, Joseph Yuan-Chieh Lo

JMI, Vol. 6, Issue 02, 021604, (March 2019) https://doi.org/10.1117/12.10.1117/1.JMI.6.2.021604

KEYWORDS: Breast, Tissues, Digital breast tomosynthesis, Printing, Mammography, Signal attenuation, 3D printing, Digital mammography, Chest, Imaging systems

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Proceedings Article | 14 June 2018 Presentation + Paper

An information theoretic approach to system optimization accounting for material variability

David Coccarelli, Joel Greenberg, Ratchaneekorn Thamvichai, Jay Voris, Ahmad Masoudi, Amit Ashok, Michael Gehm

Proceedings Volume 10632, 106320F (2018) https://doi.org/10.1117/12.2305227

KEYWORDS: X-rays, Spectral resolution, Sensors, Radiography, Signal attenuation, Spatial resolution, Signal to noise ratio, X-ray imaging, Computer architecture, Telecommunications

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Proceedings Article | 14 May 2018 Presentation + Paper

Channel-first design of modulated polarimeters

Jiawei Song, Israel Vaughn, Andrey Alenin, Michael Gehm, J. Scott Tyo

Proceedings Volume 10655, 106550I (2018) https://doi.org/10.1117/12.2309847

KEYWORDS: Polarimetry, Wave plates, Polarization, Poincaré sphere, Sensors, Polarimetric sensing, Remote sensing

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Proceedings Article | 14 May 2018 Presentation

X-ray measurement model and information-theoretic system metric incorporating material variability (Conference Presentation)

Ahmad Masoudi, Jay Voris, David Coccarelli, Joel Greenberg, Michael Gehm, Amit Ashok

Proceedings Volume 10632, 106320H (2018) https://doi.org/10.1117/12.2307242

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Proceedings Article | 9 March 2018 Presentation + Paper

3D printed anthropomorphic physical phantom for mammography and DBT with high contrast custom materials, lesions, and uniform chest wall region

Andrea Rossman, Matthew Catenacci, Anne Li, Thomas Sauer, Justin Solomon, Michael Gehm, Benjamin Wiley, Ehsan Samei, Joseph Lo

Proceedings Volume 10573, 105730C (2018) https://doi.org/10.1117/12.2294519

KEYWORDS: Breast, Mammography, Digital breast tomosynthesis, Imaging systems, 3D printing

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Proceedings Article | 7 June 2017 Presentation

Adaptive x-ray threat detection using sequential hypotheses testing with fan-beam experimental data (Conference Presentation)

Ratchaneekorn Thamvichai, Liang-Chih Huang, Amit Ashok, Qian Gong, David Coccarelli, Joel Greenberg, Michael Gehm, Mark Neifeld

Proceedings Volume 10187, 101870A (2017) https://doi.org/10.1117/12.2266756

KEYWORDS: Adaptive optics, X-ray optics, Digital x-ray imaging, X-ray imaging, Current controlled current source, X-rays, Data acquisition, Error analysis, X-ray detectors

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Proceedings Article | 1 May 2017 Presentation + Paper

Creating an experimental testbed for information-theoretic analysis of architectures for x-ray anomaly detection

David Coccarelli, Joel Greenberg, Sagar Mandava, Qian Gong, Liang-Chih Huang, Amit Ashok, Michael Gehm

Proceedings Volume 10187, 1018709 (2017) https://doi.org/10.1117/12.2263033

KEYWORDS: Sensors, Detector arrays, Data acquisition, Databases, X-rays, Reconstruction algorithms, Temporal resolution, Analytical research, X-ray detectors, Detection and tracking algorithms, Spectral resolution, Spatial resolution, Systems modeling

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Proceedings Article | 1 May 2017 Presentation + Paper

Image reconstruction for view-limited x-ray CT in baggage scanning

Sagar Mandava, David Coccarelli, Joel Greenberg, Michael Gehm, Amit Ashok, Ali Bilgin

Proceedings Volume 10187, 101870F (2017) https://doi.org/10.1117/12.2265491

KEYWORDS: Compressed sensing, Image segmentation, Dual energy imaging, Sensors, Data acquisition, Image restoration, X-rays, X-ray computed tomography, Reconstruction algorithms, X-ray imaging, Scanners

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Proceedings Article | 9 March 2017 Presentation + Paper

Third generation anthropomorphic physical phantom for mammography and DBT: incorporating voxelized 3D printing and uniform chest wall QC region

Christine Zhao, Justin Solomon, Gregory Sturgeon, Michael Gehm, Matthew Catenacci, Benjamin Wiley, Ehsan Samei, Joseph Lo

Proceedings Volume 10132, 101321Y (2017) https://doi.org/10.1117/12.2256091

KEYWORDS: Breast, Digital breast tomosynthesis, 3D printing, Mammography, Chest, Doping, Metals, Zinc, Signal attenuation, Printing

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Proceedings Article | 19 May 2016 Paper

Computational hyperspectral unmixing using the AFSSI-C

Phillip Poon, Esteban Vera, Michael Gehm

Proceedings Volume 9870, 987003 (2016) https://doi.org/10.1117/12.2223193

KEYWORDS: Imaging spectroscopy, Signal to noise ratio, Organic light emitting diodes, Digital micromirror devices, Light emitting diodes, LED displays, Multiplexing, Staring arrays, Imaging devices, Error analysis

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Proceedings Article | 12 May 2016 Paper

Information-theoretic analysis of x-ray scatter and phase architectures for anomaly detection

David Coccarelli, Qian Gong, Razvan-Ionut Stoian, Joel Greenberg, Michael Gehm, Yuzhang Lin, Liang-Chih Huang, Amit Ashok

Proceedings Volume 9847, 98470B (2016) https://doi.org/10.1117/12.2223175

KEYWORDS: X-rays, X-ray imaging, Imaging systems, Sensors, Systems modeling, Scattering, Laser scattering, Signal attenuation, Phase measurement, Data modeling

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Proceedings Article | 12 May 2016 Paper

Information-theoretic analysis of x-ray photoabsorption based threat detection system for check-point

Yuzhang Lin, Genevieve Allouche, James Huang, Amit Ashok, Qian Gong, David Coccarelli, Razvan-Ionut Stoian, Michael Gehm

Proceedings Volume 9847, 98470F (2016) https://doi.org/10.1117/12.2223803

KEYWORDS: Detector arrays, X-rays, X-ray detectors, Spectral resolution, Sensors, Computing systems, Detection and tracking algorithms, Signal to noise ratio, Dual energy imaging, Statistical analysis

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Proceedings Article | 12 May 2016 Paper

Rapid GPU-based simulation of x-ray transmission, scatter, and phase measurements for threat detection systems

Qian Gong, David Coccarelli, Razvan-Ionut Stoian, Joel Greenberg, Esteban Vera, Michael Gehm

Proceedings Volume 9847, 98470Q (2016) https://doi.org/10.1117/12.2223244

KEYWORDS: 3D modeling, X-rays, X-ray imaging, Computer simulations, Compton scattering, Sensors, Scattering, Signal attenuation, Rayleigh scattering, Laser scattering

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Proceedings Article | 22 March 2016 Paper

Second generation anthropomorphic physical phantom for mammography and DBT: Incorporating voxelized 3D printing and inkjet printing of iodinated lesion inserts

Dhiraj Sikaria, Stephanie Musinsky, Gregory Sturgeon, Justin Solomon, Andrew Diao, Michael Gehm, Ehsan Samei, Stephen Glick, Joseph Lo

Proceedings Volume 9783, 978360 (2016) https://doi.org/10.1117/12.2217667

KEYWORDS: Breast, Digital breast tomosynthesis, 3D printing, Inkjet technology, Printing, Mammography, Photopolymers, Imaging systems, Doping, Signal attenuation, Digital mammography, Digital x-ray imaging, Optical phantoms, Iodine, 3D modeling, Data modeling

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Proceedings Article | 22 March 2016 Paper

Design, fabrication, and implementation of voxel-based 3D printed textured phantoms for task-based image quality assessment in CT

Justin Solomon, Alexandre Ba, Andrew Diao, Joseph Lo, Elianna Bier, François Bochud, Michael Gehm, Ehsan Samei

Proceedings Volume 9783, 978328 (2016) https://doi.org/10.1117/12.2217463

KEYWORDS: Image quality, 3D printing, X-ray computed tomography, 3D modeling, Liver, 3D image processing, Image segmentation, Matrices, Genetics, Optimization (mathematics), Reconstruction algorithms, Printing, Computed tomography

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In x-ray computed tomography (CT), task-based image quality studies are typically performed using uniform background phantoms with low-contrast signals. Such studies may have limited clinical relevancy for modern non-linear CT systems due to possible influence of background texture on image quality. The purpose of this study was to design and implement anatomically informed textured phantoms for task-based assessment of low-contrast detection. Liver volumes were segmented from 23 abdominal CT cases. The volumes were characterized in terms of texture features from gray-level co-occurrence and run-length matrices. Using a 3D clustered lumpy background (CLB) model, a fitting technique based on a genetic optimization algorithm was used to find the CLB parameters that were most reflective of the liver textures, accounting for CT system factors of spatial blurring and noise. With the modeled background texture as a guide, a cylinder phantom (165 mm in diameter and 30 mm height) was designed, containing 20 low-contrast spherical signals (6 mm in diameter at targeted contrast levels of ~3.2, 5.2, 7.2, 10, and 14 HU, 4 repeats per signal). The phantom was voxelized and input into a commercial multi-material 3D printer (Object Connex 350), with custom software for voxel-based printing. Using principles of digital half-toning and dithering, the 3D printer was programmed to distribute two base materials (VeroWhite and TangoPlus, nominal voxel size of 42x84x30 microns) to achieve the targeted spatial distribution of x-ray attenuation properties. The phantom was used for task-based image quality assessment of a clinically available iterative reconstruction algorithm (Sinogram Affirmed Iterative Reconstruction, SAFIRE) using a channelized Hotelling observer paradigm. Images of the textured phantom and a corresponding uniform phantom were acquired at six dose levels and observer model performance was estimated for each condition (5 contrasts x 6 doses x 2 reconstructions x 2 backgrounds = 120 total conditions). Based on the observer model results, the dose reduction potential of SAFIRE was computed and compared between the uniform and textured phantom. The dose reduction potential of SAFIRE was found to be 23% based on the uniform phantom and 17% based on the textured phantom. This discrepancy demonstrates the need to consider background texture when assessing non-linear reconstruction algorithms.

Proceedings Article | 15 March 2016 Paper

Adaptive architectures for spectral processing

M. Gehm

Proceedings Volume 9761, 97610F (2016) https://doi.org/10.1117/12.2214556

KEYWORDS: Detector arrays, Imaging spectroscopy, Digital micromirror devices, Optical filters, Spectroscopes, Spectrographs, Mirrors, Bayesian inference, Signal to noise ratio, Spectroscopy, Calibration, Sensors, Systems modeling, Sensing systems, Optical sensing

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Proceedings Article | 14 February 2013 Open Access

Petapixel photography and the limits of camera information capacity

David Brady, Daniel Marks, Steven Feller, Michael Gehm, Dathon Golish, Esteban Vera, David Kittle

Proceedings Volume 8657, 86570B (2013) https://doi.org/10.1117/12.2014274

KEYWORDS: Cameras, Image processing, Image acquisition, Video, Image quality standards, Composites, Imaging systems, Photography, Lenses, Image resolution

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Proceedings Article | 8 June 2012 Paper

Adaptive feature-specific spectral imaging

P. Jansen, M. Dunlop, D. Golish, M. Gehm

Proceedings Volume 8365, 83650B (2012) https://doi.org/10.1117/12.918856

KEYWORDS: Imaging spectroscopy, Computer aided design, Principal component analysis, Sensors, Imaging systems, Optical filters, Prototyping, Spectroscopy, Digital micromirror devices, Library classification systems

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Proceedings Article | 3 May 2012 Paper

A static architecture for compressive target tracking

Phillip Poon, Daniel Townsend, Scott Wehrwein, Esteban Vera, Michael Stenner, Michael Gehm

Proceedings Volume 8360, 83600G (2012) https://doi.org/10.1117/12.918878

KEYWORDS: Sensors, Point spread functions, Compressed sensing, Spatial light modulators, Micromirrors, Reconstruction algorithms, Data storage, Calibration, Data communications, Telecommunications

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Proceedings Article | 3 June 2011 Paper

Image formation challenges in the MOSAIC platform

M. Gehm, D. Golish, E. Vera, J. Hahn, D. Marks, D. Brady

Proceedings Volume 8056, 80560T (2011) https://doi.org/10.1117/12.883695

KEYWORDS: Image acquisition, Optical design, Objectives, Image registration, Cameras, Imaging systems, Spherical lenses, Composites, Systems modeling, Image processing

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Proceedings Article | 24 February 2011 Paper

Electromagnetic crystal (EMXT)-based THz components

Ziran Wu, Wei-Ren Ng, Michael Gehm, Hao Xin

Proceedings Volume 7938, 79380I (2011) https://doi.org/10.1117/12.874213

KEYWORDS: Terahertz radiation, Waveguides, Antennas, Rapid manufacturing, Electromagnetism, Dielectrics, Crystals, Device simulation, Polymers, Wave propagation

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Proceedings Article | 24 August 2009 Paper

Compressive measurement for target tracking in persistent, pervasive surveillance applications

Michael Gehm, Michael Stenner

Proceedings Volume 7468, 746808 (2009) https://doi.org/10.1117/12.827048

KEYWORDS: Sensors, Surveillance, Reconstruction algorithms, Image compression, Motion measurement, Imaging systems, Spatial light modulators, Optical tracking, Image resolution, Image sensors

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Proceedings Article | 1 May 2009 Paper

Rapid prototyping for fabrication of GHz-THz bandgap structures

Michael Gehm, Ziran Wu, Hao Xin

Proceedings Volume 7311, 73110F (2009) https://doi.org/10.1117/12.818397

KEYWORDS: Terahertz radiation, Polymers, Dielectrics, Rapid manufacturing, Fabrication, Electromagnetism, 3D modeling, Optical design, Volume holography, Holograms

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Proceedings Article | 29 April 2009 Paper

Adaptive spectroscopy for rapid chemical identification

Dineshbabu Dinakarababu, Michael Gehm

Proceedings Volume 7319, 73190A (2009) https://doi.org/10.1117/12.818277

KEYWORDS: Spectroscopy, Signal to noise ratio, Spectroscopes, Optical filters, Library classification systems, Device simulation, Chemical detection, Prototyping, Chemical elements, Antimony

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Proceedings Article | 1 April 2008 Paper

Adaptive spectroscopy: towards adaptive spectral imaging

M. Gehm, J. Kinast

Proceedings Volume 6978, 69780I (2008) https://doi.org/10.1117/12.779174

KEYWORDS: Imaging spectroscopy, Spectroscopy, Sensors, Chemical elements, Signal to noise ratio, Imaging systems, Signal detection, Interference (communication), Multiplexing, Detector arrays

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Proceedings Article | 28 February 2007 Paper

Multiscale reconstruction for computational spectral imaging

R. Willett, M. Gehm, D. Brady

Proceedings Volume 6498, 64980L (2007) https://doi.org/10.1117/12.715711

KEYWORDS: Imaging systems, Imaging spectroscopy, Spectroscopy, Denoising, Sensors, Compressed sensing, Image analysis, Optical filters, Data analysis, Image processing

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Proceedings Article | 18 May 2006 Paper

Compressive sampling strategies for integrated microspectrometers

David Brady, Michael Gehm, Nikos Pitsianis, Xiaobai Sun

Proceedings Volume 6232, 62320C (2006) https://doi.org/10.1117/12.666124

KEYWORDS: Compressed sensing, Spectroscopy, Sensors, Statistical modeling, Sensing systems, Spectrometers, Spectrometer engineering, Chemical elements, Systems modeling, Reconstruction algorithms

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Proceedings Article | 12 May 2006 Paper

Compressive imaging spectrometers using coded apertures

D. Brady, M. Gehm

Proceedings Volume 6246, 62460A (2006) https://doi.org/10.1117/12.667605

KEYWORDS: Imaging spectroscopy, Imaging systems, Spectrometers, Sensors, Reconstruction algorithms, Compressive imaging, Coded apertures, Compressed sensing, Spectroscopy, Computing systems

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Proceedings Article | 27 February 2006 Paper

Multimodal multiplex Raman spectroscopy optimized for in vivo chemometrics

S. McCain, M. Gehm, Y. Wang, N. Pitsianis, D. Brady

Proceedings Volume 6093, 60930P (2006) https://doi.org/10.1117/12.646755

KEYWORDS: Raman spectroscopy, Spectroscopy, Signal detection, Chemometrics, Luminescence, Bioalcohols, Raman scattering, Scattering, Molecules, Data modeling

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Proceedings Article | 23 February 2006 Paper

High-throughput hyperspectral microscopy

M. Gehm, D. Brady

Proceedings Volume 6090, 609007 (2006) https://doi.org/10.1117/12.644828

KEYWORDS: Tomography, Hyperspectral imaging, Imaging systems, Microscopes, Spectroscopy, Microscopy, Signal to noise ratio, Prisms, Optical components, Spectrometer engineering

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Proceedings Article | 9 November 2005 Paper

Standoff raman spectroscopy system for remote chemical detection

E. C. Cull, M. E. Gehm, B. D. Guenther, D. J. Brady

Proceedings Volume 5994, 59940H (2005) https://doi.org/10.1117/12.626170

KEYWORDS: Spectrometers, Raman spectroscopy, Coded apertures, Spectral resolution, Light scattering, Telescopes, Chemical detection, Signal to noise ratio, Photons, Sensors

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Proceedings Article | 1 September 2005 Paper

Multimodal, multiplex, Raman spectroscopy of alcohol in diffuse, fluorescent media

Scott McCain, Michael Gehm, Yanqia Wang, Nikos Pitsianis, Michael Sullivan, David Brady

Proceedings Volume 5864, 58640L (2005) https://doi.org/10.1117/12.632934

KEYWORDS: Raman spectroscopy, Charge-coupled devices, Tissue optics, Sensors, Spectroscopy, Bioalcohols, Semiconductor lasers, Photomasks, Raman scattering, CCD image sensors

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Proceedings Article | 20 May 2005 Paper

Multimodal optical spectrometers for remote chemical detection

E. Cull, M. Gehm, S. McCain, B. Guenther, D. Brady

Proceedings Volume 5778, (2005) https://doi.org/10.1117/12.606574

KEYWORDS: Spectrometers, Raman spectroscopy, Light scattering, Chemical detection, Spectral resolution, Telescopes, Raman scattering, Scattering, Photons, Molecules

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