Dr. Jens Wiegert Profile

Dr. Jens Wiegert

at Philips Research

SPIE Involvement:

Author

Publications (16)

Proceedings Article | 21 March 2014 Paper

Towards a comprehensive CT image segmentation for thoracic organ radiation dose estimation and reporting

Cristian Lorenz, Heike Ruppertshofen, Torbjörn Vik, Peter Prinsen, Jens Wiegert

Proceedings Volume 9034, 90340A (2014) https://doi.org/10.1117/12.2042998

KEYWORDS: Tissues, Bone, Breast, Image segmentation, Lung, Heart, Spine, Monte Carlo methods, Natural surfaces, Cancer

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Proceedings Article | 23 March 2010 Paper

Use of beam shapers for cone-beam CT with off-centered flat detector

Bernd Menser, Jens Wiegert, Steffen Wiesner, Matthias Bertram

Proceedings Volume 7622, 762233 (2010) https://doi.org/10.1117/12.844437

KEYWORDS: Sensors, Beam shaping, Monte Carlo methods, Signal detection, Optical simulations, Image filtering, Optical filters, X-rays, Signal to noise ratio, X-ray computed tomography

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Proceedings Article | 22 March 2010 Paper

Improved CT image quality using a new fully physical imaging chain

Jens Wiegert, Matthias Bertram, Steffen Wiesner, Richard Thompson, Kevin Brown, Thomas Morton, Tsvi Katchalski, Yoad Yagil

Proceedings Volume 7622, 76221I (2010) https://doi.org/10.1117/12.844564

KEYWORDS: Image quality, Collimation, Sensors, Computed tomography, Scanners, Image quality standards, Monte Carlo methods, Liver, Image processing, Medicine

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Proceedings Article | 14 March 2009 Paper

Impact of scattered radiation on spectral CT

Jens Wiegert, Klaus Jürgen Engel, Christoph Herrmann

Proceedings Volume 7258, 72583X (2009) https://doi.org/10.1117/12.813674

KEYWORDS: Sensors, Photons, Monte Carlo methods, Signal attenuation, Fluctuations and noise, Computed tomography, Statistical analysis, Gadolinium, X-ray computed tomography, Computer simulations

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Proceedings Article | 18 March 2008 Paper

Spectral analysis of scattered radiation in CT

Klaus Engel, Christian Bäumer, Jens Wiegert, Günter Zeitler

Proceedings Volume 6913, 69131R (2008) https://doi.org/10.1117/12.771063

KEYWORDS: Photons, Sensors, X-rays, Monte Carlo methods, X-ray computed tomography, Fluctuations and noise, Scattering, Compton scattering, Rayleigh scattering, Laser scattering

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Proceedings Article | 18 March 2008 Paper

Monte-Carlo scatter correction for cone-beam computed tomography with limited scan field-of-view

Matthias Bertram, Timo Sattel, Steffen Hohmann, Jens Wiegert

Proceedings Volume 6913, 69131Y (2008) https://doi.org/10.1117/12.771103

KEYWORDS: Monte Carlo methods, X-rays, Sensors, Computer simulations, Signal attenuation, Computed tomography, Photons, X-ray detectors, CT reconstruction, Abdomen

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Proceedings Article | 18 March 2008 Paper

Iterative scatter correction based on artifact assessment

Jens Wiegert, Steffen Hohmann, Matthias Bertram

Proceedings Volume 6913, 69132B (2008) https://doi.org/10.1117/12.771029

KEYWORDS: Tissues, Monte Carlo methods, Head, Optimization (mathematics), Image resolution, Reconstruction algorithms, X-rays, Computed tomography, CT reconstruction, Image segmentation

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Proceedings Article | 19 March 2007 Paper

Method for the determination of the modulation transfer function (MTF) in 3D x-ray imaging systems with focus on correction for finite extent of test objects

Dirk Schäfer, Jens Wiegert, Matthias Bertram

Proceedings Volume 6510, 65104Q (2007) https://doi.org/10.1117/12.708924

KEYWORDS: Modulation transfer functions, Fourier transforms, Radon transform, 3D image processing, Imaging systems, Sensors, X-rays, X-ray computed tomography, 3D metrology, Spatial frequencies

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Proceedings Article | 13 March 2007 Paper

Scattered radiation in flat-detector based cone-beam CT: propagation of signal, contrast, and noise into reconstructed volumes

Jens Wiegert, Steffen Hohmann, Matthias Bertram

Proceedings Volume 6510, 65100X (2007) https://doi.org/10.1117/12.710196

KEYWORDS: Reconstruction algorithms, Sensors, Image quality, Interference (communication), Lithium, Head, Linear filtering, Monte Carlo methods, Computed tomography, X-ray computed tomography

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Proceedings Article | 2 March 2006 Paper

Scatter correction for cone-beam computed tomography using simulated object models

Matthias Bertram, Jens Wiegert, Georg Rose

Proceedings Volume 6142, 61421C (2006) https://doi.org/10.1117/12.651027

KEYWORDS: Monte Carlo methods, Head, Sensors, Computer simulations, X-rays, Model-based design, 3D modeling, Computed tomography, Optimization (mathematics), X-ray imaging

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Proceedings Article | 2 March 2006 Paper

Scattered radiation in flat-detector based cone-beam CT: analysis of voxelized patient simulations

Jens Wiegert, Matthias Bertram

Proceedings Volume 6142, 614235 (2006) https://doi.org/10.1117/12.652719

KEYWORDS: Monte Carlo methods, Head, Sensors, Computer simulations, Spatial resolution, Photons, X-ray computed tomography, Computed tomography, Signal attenuation, Tissues

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Proceedings Article | 20 April 2005 Paper

Potential of software-based scatter corrections in cone-beam volume CT

Matthias Bertram, Jens Wiegert, Georg Rose

Proceedings Volume 5745, (2005) https://doi.org/10.1117/12.595032

KEYWORDS: Sensors, Monte Carlo methods, Head, Computer simulations, X-rays, Signal attenuation, X-ray computed tomography, Photons, Linear filtering, Neodymium

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Proceedings Article | 20 April 2005 Paper

Model based scatter correction for cone-beam computed tomography

Jens Wiegert, Matthias Bertram, Georg Rose, Til Aach

Proceedings Volume 5745, (2005) https://doi.org/10.1117/12.594520

KEYWORDS: Scattering, Sensors, Signal attenuation, Monte Carlo methods, Photons, X-rays, Computed tomography, X-ray computed tomography, Signal to noise ratio, Compton scattering

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Proceedings Article | 6 May 2004 Paper

Performance of standard fluoroscopy antiscatter grids in flat-detector-based cone-beam CT

Jens Wiegert, Matthias Bertram, Dirk Schaefer, Norbert Conrads, Jan Timmer, Til Aach, Georg Rose

Proceedings Volume 5368, (2004) https://doi.org/10.1117/12.535387

KEYWORDS: Sensors, Collimation, Monte Carlo methods, Signal to noise ratio, Photons, Fluoroscopy, Head, Fluctuations and noise, X-rays, Signal attenuation

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Proceedings Article | 6 May 2004 Paper

Soft-tissue contrast resolution within the head of human cadaver by means of flat-detector-based cone-beam CT

Jens Wiegert, Matthias Bertram, Dirk Schaefer, Norbert Conrads, Niels Noordhoek, Kees de Jong, Til Aach, Georg Rose

Proceedings Volume 5368, (2004) https://doi.org/10.1117/12.535191

KEYWORDS: Sensors, Homogenization, Head, Tissues, X-ray detectors, Visibility, 3D image processing, 3D image reconstruction, X-rays, X-ray computed tomography

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Proceedings Article | 5 June 2003 Paper

Image quality of flat-panel cone beam CT

Georg Rose, Jens Wiegert, Dirk Schaefer, Klaus Fiedler, Norbert Conrads, Jan Timmer, Volker Rasche, Niels Noordhoek, Erhard Klotz, Reiner Koppe

Proceedings Volume 5030, (2003) https://doi.org/10.1117/12.479973

KEYWORDS: Spatial resolution, X-ray computed tomography, Sensors, Image quality, Modulation transfer functions, X-rays, Bone, X-ray detectors, Computed tomography, Calibration

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Showing 5 of 16 publications

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