Mr. Ralf Gutjahr Profile

Ralf Gutjahr

PhD student at Siemens Healthineers

SPIE Involvement:

Author

Publications (9)

SPIE Journal Paper | 16 November 2017

Lung nodule volume quantification and shape differentiation with an ultra-high resolution technique on a photon-counting detector computed tomography system

Wei Zhou, Juan Montoya, Ralf Gutjahr, Andrea Ferrero, Ahmed Halaweish, Steffen Kappler, Cynthia McCollough, Shuai Leng

JMI, Vol. 4, Issue 04, 043502, (November 2017) https://doi.org/10.1117/12.10.1117/1.JMI.4.4.043502

KEYWORDS: Lung, Sensors, Computed tomography, Optical spheres, Stars, Spatial resolution, Photodetectors, Optical computing, Scanners, Statistical analysis

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Proceedings Article | 9 March 2017 Paper

Lung nodule volume quantification and shape differentiation with an ultra-high resolution technique on a photon counting detector CT system

W. Zhou, J. Montoya, R. Gutjahr, A. Ferrero, A. Halaweish, S. Kappler, C. McCollough, S. Leng

Proceedings Volume 10132, 101323Q (2017) https://doi.org/10.1117/12.2255736

KEYWORDS: Medicine, Lung, Photon counting, Computed tomography, Sensors, Optical spheres, Stars, Spatial resolution, Receivers, Scanners, Cones, Imaging systems

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Proceedings Article | 9 March 2017 Paper

Renal stone characterization using high resolution imaging mode on a photon counting detector CT system

A. Ferrero, R. Gutjahr, A. Henning, S. Kappler, A. Halaweish, D. Abdurakhimova, Z. Peterson, J. Montoya, S. Leng, C. McCollough

Proceedings Volume 10132, 101323J (2017) https://doi.org/10.1117/12.2255651

KEYWORDS: Imaging systems, Photon counting, Computed tomography, Photodetectors, Image resolution, Renal calculi, Spatial resolution, X-ray computed tomography, X-ray detectors

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Proceedings Article | 9 March 2017 Paper

Ultra-high spatial resolution multi-energy CT using photon counting detector technology

S. Leng, R. Gutjahr, A. Ferrero, S. Kappler, A. Henning, A. Halaweish, W. Zhou, J. Montoya, C. McCollough

Proceedings Volume 10132, 101320Y (2017) https://doi.org/10.1117/12.2255589

KEYWORDS: Dual energy imaging, Photon counting, Sensors, Collimation, Spatial resolution, Computed tomography, Scanners, Renal calculi, Lung, Image resolution, Collimators, Imaging systems

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Proceedings Article | 9 March 2017 Paper

Improving material separation of high-flux whole-body photon counting computed tomography by K-edge pre-filtration

C. Polster, R. Gutjahr, M. Berner, T. Flohr, M. Hertel, S. Kappler, K. Stierstorfer, O. Dietrich

Proceedings Volume 10132, 101320W (2017) https://doi.org/10.1117/12.2254289

KEYWORDS: Photon counting, X-rays, Sensors, X-ray computed tomography, X-ray detectors, Signal detection, Computed tomography, CT reconstruction, Prototyping, Scanners, Hafnium, Iodine, Bone, Photodetectors, Photons, Aluminum

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Proceedings Article | 9 March 2017 Paper

Dual energy CT kidney stone differentiation in photon counting computed tomography

R. Gutjahr, C. Polster, A. Henning, S. Kappler, S. Leng, C. McCollough, M. Sedlmair, B. Schmidt, B. Krauss, T. Flohr

Proceedings Volume 10132, 1013237 (2017) https://doi.org/10.1117/12.2252021

KEYWORDS: Renal calculi, Dual energy imaging, Photon counting, Computed tomography, Calcium, Apatite, X-ray imaging, X-rays, Calculi, Curium, X-ray computed tomography, Scanners, Image processing

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Proceedings Article | 25 March 2016 Paper

Material decomposition and virtual non-contrast imaging in photon counting computed tomography: an animal study

R. Gutjahr, C. Polster, S. Kappler, H. Pietsch, G. Jost, K. Hahn, F. Schöck, M. Sedlmair, T. Allmendinger, B. Schmidt, B. Krauss, T. Flohr

Proceedings Volume 9783, 97831G (2016) https://doi.org/10.1117/12.2216861

KEYWORDS: Xenon, Lung, X-rays, Tissues, Gadolinium, Sensors, Detection and tracking algorithms, Photon counting, Computed tomography, 3D image enhancement

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Proceedings Article | 25 March 2016 Paper

Improving material decomposition by spectral optimization of photon counting computed tomography

C. Polster, K. Hahn, R. Gutjahr, F. Schöck, S. Kappler, O. Dietrich, T. Flohr

Proceedings Volume 9783, 97831O (2016) https://doi.org/10.1117/12.2216711

KEYWORDS: Sensors, X-ray detectors, X-rays, Photon counting, Computed tomography, Photodetectors, Mass attenuation coefficient, CT reconstruction, X-ray computed tomography, Image quality standards, Ytterbium, Monte Carlo methods, Bone, Iodine, Thulium

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Proceedings Article | 18 March 2015 Paper

Initial results from a prototype whole-body photon-counting computed tomography system

Z. Yu, S. Leng, S. Jorgensen, Z. Li, R. Gutjahr, B. Chen, X. Duan, A. Halaweish, L. Yu, E. Ritman, C. McCollough

Proceedings Volume 9412, 94120W (2015) https://doi.org/10.1117/12.2082739

KEYWORDS: Prototyping, Iodine, Head, Modulation transfer functions, Spatial resolution, X-ray computed tomography, Sensors, Image quality, X-rays, Computed tomography

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Showing 5 of 9 publications

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