Dr. Torsten Hopp Profile

Dr. Torsten Hopp

Senior Scientist at Karlsruher Institut fuer Technologie

SPIE Involvement:

Conference Program Committee | Author

Publications (34)

Proceedings Article | 1 April 2024 Presentation + Paper

Reconstruction of tissue scatter characteristics using 3D ultrasound tomography

T. Hopp, J. Maul, B. Ebener, M. Zapf, N. Ruiter

Proceedings Volume 12932, 129320F (2024) https://doi.org/10.1117/12.3006238

KEYWORDS: Specular reflections, Voxels, Receivers, Reflectivity, Data modeling, Tissues, Ultrasound tomography, Ultrasound transducers, Ultrasonography

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Proceedings Article | 10 April 2023 Presentation + Paper

First imaging results with the new generation of the KIT 3D ultrasound tomography device

T. Hopp, M. Zapf, L. Fernandez-Lago, F. Feldbusch, H. Gemmeke, N. Ruiter

Proceedings Volume 12470, 1247003 (2023) https://doi.org/10.1117/12.2653349

KEYWORDS: Imaging systems, Transducers, Gelatin, 3D image processing, Ultrasound tomography, Reflection, Receivers, Breast

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Proceedings Article | 3 April 2023 Poster + Paper

Image-based registration between full x-ray and spot mammograms: analysis of registration accuracy in subgroups

S. Said, P. Clauser, N. Ruiter, P. A. Baltzer, T. Hopp

Proceedings Volume 12466, 124661V (2023) https://doi.org/10.1117/12.2653978

KEYWORDS: Mammography, Image registration, X-rays, Breast, X-ray imaging, Biopsy, Muscles, Magnetic resonance imaging, Nipple, Image restoration

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Proceedings Article | 3 April 2023 Poster + Paper

Image registration of diffusion weighted and conventional breast MRI

Torsten Hopp, Ibrahim Tabet, Sarah Said, Paola Clauser, Pascal Baltzer, Nicole Ruiter

Proceedings Volume 12464, 124641T (2023) https://doi.org/10.1117/12.2653350

KEYWORDS: Image registration, Diffusion weighted imaging, Breast, Magnetic resonance imaging, Image fusion, Diffusion, Image processing, Deformation, Edge detection

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Proceedings Article | 13 July 2022 Paper

MRI breast segmentation using unsupervised neural networks for biomechanical models

S. Said, M. Meyling, R. Huguenot, M. Horning, P. Clauser, N. Ruiter, P. A. T. Baltzer, T. Hopp

Proceedings Volume 12286, 122860C (2022) https://doi.org/10.1117/12.2624245

KEYWORDS: Tissues, Magnetic resonance imaging, Breast, Image segmentation, Neural networks, X-rays, X-ray imaging, Medical imaging, Fuzzy logic, Mammography

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Proceedings Article | 4 April 2022 Presentation + Paper

Realization of an pseudo-randomly sampled 3D USCT

M. Zapf, T. Hopp, H. Gemmeke, M. Angerer, Z. Lu, O. Molchanova, N. Rashvand, R. Blanco, P. Steck, B. Leyrer, D. Tcherniakhovski, D. Bormann, K. Schlote-Holubek, N. Ruiter

Proceedings Volume 12038, 1203808 (2022) https://doi.org/10.1117/12.2611705

KEYWORDS: Transducers, Data acquisition, 3D acquisition, Signal attenuation, Reflectivity, Ultrasonography, Ferroelectric materials, Breast

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Proceedings Article | 4 April 2022 Presentation + Paper

Wave-based ultrasound transmission tomography using the paraxial approximation in 2D

Olga Molchanova, Hartmut Gemmeke, Michael Zapf, Torsten Hopp, Hongjian Wang, Nicole Ruiter

Proceedings Volume 12038, 120380P (2022) https://doi.org/10.1117/12.2611544

KEYWORDS: Paraxial approximations, Breast cancer, Cancer, Computed tomography, Ultrasound transmission tomography

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Proceedings Article | 4 April 2022 Poster + Presentation + Paper

Segmentation of the mouse skull for MRI guided transcranial focused ultrasound therapy planning

T. Hopp, L. Springer, C. Gross, S. Grudzenski-Theis, F. Mathis-Ullrich, N.V. Ruiter

Proceedings Volume 12034, 120341P (2022) https://doi.org/10.1117/12.2607371

KEYWORDS: Skull, Image segmentation, Brain, Magnetic resonance imaging, Acoustics, Ultrasonography, Neuroimaging, In vivo imaging, 3D modeling, Image resolution

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Proceedings Article | 4 April 2022 Poster + Presentation + Paper

Image based registration between full x-ray and spot mammograms for x-ray guided stereotactic breast biopsy

S. Said, P. Clauser, N. Ruiter, P. A. T. Baltzer, T. Hopp

Proceedings Volume 12034, 120342L (2022) https://doi.org/10.1117/12.2611509

KEYWORDS: Mammography, X-rays, Image registration, X-ray imaging, Biopsy, Breast, Magnetic resonance imaging

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Proceedings Article | 26 February 2021 Presentation + Paper

DDN: dual domain network architecture for non-linear ultrasound transmission tomography reconstruction

Yuling Fan, Hongjian Wang, Hartmut Gemmeke, Torsten Hopp, Jürgen Hesser

Proceedings Volume 11602, 1160209 (2021) https://doi.org/10.1117/12.2580911

KEYWORDS: Network architectures, Ultrasound transmission tomography, Signal attenuation, Ultrasonography, Tissues, Paraxial approximations, Inverse problems, Computed tomography, Breast cancer

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Proceedings Article | 15 February 2021 Presentation + Paper

Image registration between MRI and spot mammograms for X-ray guided stereotactic breast biopsy: preliminary results

S. Said, P. Clauser, N. Ruiter, P. A. T. Baltzer, T. Hopp

Proceedings Volume 11598, 115981C (2021) https://doi.org/10.1117/12.2581820

KEYWORDS: Mammography, Image registration, Magnetic resonance imaging, Biopsy, X-rays, Breast, X-ray imaging, Breast cancer, Image restoration, Cancer

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Proceedings Article | 15 February 2021 Presentation + Paper

Strain elastography with ultrasound computer tomography: a simulation study based on biomechanical models

T. Hopp, N. Ruiter

Proceedings Volume 11602, 116020Z (2021) https://doi.org/10.1117/12.2580884

KEYWORDS: Computed tomography, Computer simulations, Ultrasonography, Tomography, Elastography, Breast, Tissues, Image registration, Visualization, Visual analytics

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Proceedings Article | 16 March 2020 Presentation + Paper

Fat ray ultrasound transmission tomography: preliminary experimental results with simulated data

T. Hopp, F. Zuch, P-A. Comby, N. V. Ruiter

Proceedings Volume 11319, 113190M (2020) https://doi.org/10.1117/12.2548444

KEYWORDS: Receivers, Ultrasonography, Tomography, Ultrasound transmission tomography, Reconstruction algorithms, Computed tomography, Transducers, Breast, Data modeling, 3D modeling

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Proceedings Article | 15 March 2019 Presentation + Paper

Accelerating image reconstruction in ultrasound transmission tomography using L-BFGS algorithm

Hongjian Wang, Hartmut Gemmeke, Torsten Hopp, Jürgen Hesser

Proceedings Volume 10955, 109550B (2019) https://doi.org/10.1117/12.2512654

KEYWORDS: Image restoration, Reconstruction algorithms, Ultrasound transmission tomography, Inverse problems, Breast, Paraxial approximations, 3D modeling, Wave propagation, Optimization (mathematics)

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Proceedings Article | 15 March 2019 Presentation + Paper

Experimental analysis of ray-based sound speed reconstruction algorithms for phase aberration corrected USCT SAFT imaging

T. Hopp, F. Zuch, M. Zapf, H. Gemmeke, N. Ruiter

Proceedings Volume 10955, 109550J (2019) https://doi.org/10.1117/12.2512955

KEYWORDS: Point spread functions, Signal to noise ratio, Aberration correction, Receivers, Reconstruction algorithms, Ultrasonography, Visualization, Image resolution, Transducers, Image quality

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Proceedings Article | 13 March 2018 Paper

Bundling 3D- and 2D-based registration of MRI to x-ray breast tomosynthesis

P. Cotic Smole, N. Ruiter, C. Kaiser, J. Krammer, T. Hopp

Proceedings Volume 10576, 105762X (2018) https://doi.org/10.1117/12.2295048

KEYWORDS: Magnetic resonance imaging, Image registration, Breast, 3D image processing, X-rays, 3D modeling, X-ray imaging, Tissues, Computer simulations, Digital breast tomosynthesis

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Proceedings Article | 6 March 2018 Paper

USCT reference data base: conclusions from the first SPIE USCT data challenge and future directions

Nicole Ruiter, Michael Zapf, Torsten Hopp, Hartmut Gemmeke, Koen W. van Dongen, Jorge Camacho, Joaquín Herraiz, Mailyn Perez Liva, Jose Udías

Proceedings Volume 10580, 105800Q (2018) https://doi.org/10.1117/12.2293063

KEYWORDS: Reconstruction algorithms, Databases, Ultrasonography, Computed tomography, Image restoration, Interfaces, Reflectivity, Receivers, Tomography

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Proceedings Article | 6 March 2018 Paper

Experimental evaluation of straight ray and bent ray phase aberration correction for USCT SAFT imaging

T. Hopp, M. Zapf, H. Gemmeke, N. Ruiter

Proceedings Volume 10580, 105800M (2018) https://doi.org/10.1117/12.2292895

KEYWORDS: Signal to noise ratio, Breast, Aberration correction, Point spread functions, Reflectivity, Image resolution, Transducers, Ultrasonography, Image quality, Reconstruction algorithms

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Proceedings Article | 13 March 2017 Open Access

USCT data challenge

Nicole Ruiter, Michael Zapf, Torsten Hopp, Hartmut Gemmeke, Koen van Dongen

Proceedings Volume 10139, 101391N (2017) https://doi.org/10.1117/12.2272593

KEYWORDS: Reconstruction algorithms, Receivers, Data acquisition, Transducers, Ultrasonography, Image restoration, Computed tomography, Tomography, Tissues, 3D metrology

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Proceedings Article | 13 March 2017 Presentation + Paper

Time of flight interpolated synthetic aperture focusing technique

N. Ruiter, E. Kretzek, M. Zapf, T. Hopp, H. Gemmeke

Proceedings Volume 10139, 101390Q (2017) https://doi.org/10.1117/12.2254259

KEYWORDS: Computed tomography, Ultrasonography, Tomography, Image quality, Ultrasound tomography, Breast, Signal attenuation, Receivers, 3D image processing, Transducers, 3D acquisition

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Proceedings Article | 13 March 2017 Presentation + Paper

Automated breast segmentation in ultrasound computer tomography SAFT images

T. Hopp, W. You, M. Zapf, W. Y. Tan, H. Gemmeke, N. Ruiter

Proceedings Volume 10139, 101390G (2017) https://doi.org/10.1117/12.2254057

KEYWORDS: Image segmentation, Computed tomography, Breast, Ultrasonography, Tomography, Algorithm development, Reflection, Breast imaging, Imaging systems, Breast cancer, 3D image processing, Image processing, 3D modeling, Transducers

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Proceedings Article | 1 April 2016 Paper

Analysis of patient movement during 3D USCT data acquisition

N. Ruiter, T. Hopp, M. Zapf, E. Kretzek, H. Gemmeke

Proceedings Volume 9790, 979009 (2016) https://doi.org/10.1117/12.2216680

KEYWORDS: Computed tomography, Ultrasonography, 3D acquisition, 3D image processing, Image resolution, Image quality, Reflectivity

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Proceedings Article | 1 April 2016 Paper

3D ultrasound computer tomography: update from a clinical study

T. Hopp, M. Zapf, E. Kretzek, J. Henrich, A. Tukalo, H. Gemmeke, C. Kaiser, J. Knaudt, N. Ruiter

Proceedings Volume 9790, 97900A (2016) https://doi.org/10.1117/12.2216686

KEYWORDS: Computed tomography, Breast, Ultrasonography, Tomography, Magnetic resonance imaging, Visualization, Breast imaging, Clinical trials, Mammography, Breast cancer, Image fusion, Signal attenuation, Reflectivity, Receivers, Image restoration

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Proceedings Article | 21 March 2016 Paper

Glasses for 3D ultrasound computer tomography: phase compensation

M. Zapf, T. Hopp, N. Ruiter

Proceedings Volume 9784, 97843P (2016) https://doi.org/10.1117/12.2217228

KEYWORDS: Image filtering, Imaging systems, Computed tomography, Transducers, Ultrasonography, 3D image processing, Tomography, Phase compensation, 3D modeling, Glasses

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Proceedings Article | 17 March 2015 Paper

Registration of 3D ultrasound computer tomography and MRI for evaluation of tissue correspondences

T. Hopp, R. Dapp, M. Zapf, E. Kretzek, H. Gemmeke, N. Ruiter

Proceedings Volume 9419, 94190Q (2015) https://doi.org/10.1117/12.2076897

KEYWORDS: Magnetic resonance imaging, Breast, Image registration, Tissues, Computed tomography, Image fusion, Ultrasonography, 3D image processing, Protactinium, Tomography

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Proceedings Article | 17 March 2015 Paper

GPU-based 3D SAFT reconstruction including attenuation correction

E. Kretzek, T. Hopp, N. Ruiter

Proceedings Volume 9419, 94190E (2015) https://doi.org/10.1117/12.2081367

KEYWORDS: Signal attenuation, Breast, Image quality, 3D image processing, In vivo imaging, Ultrasonography, Receivers, Reconstruction algorithms, 3D metrology, Computed tomography

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Proceedings Article | 20 March 2014 Paper

Optimization of the aperture and the transducer characteristics of a 3D ultrasound computer tomography system

Nicole Ruiter, Michael Zapf, Torsten Hopp, Robin Dapp, Hartmut Gemmeke

Proceedings Volume 9040, 90400U (2014) https://doi.org/10.1117/12.2043455

KEYWORDS: Transducers, Breast, Tomography, Magnetic resonance imaging, 3D image processing, Point spread functions, Ultrasonography, Receivers, Computed tomography, Reflectivity

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Proceedings Article | 20 March 2014 Paper

Segmentation of 3D ultrasound computer tomography reflection images using edge detection and surface fitting

T. Hopp, M. Zapf, N. Ruiter

Proceedings Volume 9040, 90401R (2014) https://doi.org/10.1117/12.2044376

KEYWORDS: Image segmentation, Breast, Edge detection, 3D image processing, Computed tomography, Reflection, In vivo imaging, Ultrasonography, Tomography, Signal attenuation

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Proceedings Article | 29 March 2013 Paper

Sound speed based patient-specific biomechanical modeling for registration of USCT volumes with X-ray mammograms

T. Hopp, A. Stromboni, N. Duric, M. Zapf, H. Gemmeke, N. Ruiter

Proceedings Volume 8675, 86750L (2013) https://doi.org/10.1117/12.2006726

KEYWORDS: Breast, Mammography, Tissues, Image registration, X-rays, Finite element methods, Data modeling, X-ray imaging, 3D modeling, Computed tomography

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Proceedings Article | 29 March 2013 Paper

Experimental evaluation of noise generated by grating lobes for a sparse 3D ultrasound computer tomography system

Nicole Ruiter, Michael Zapf, Torsten Hopp, Hartmut Gemmeke

Proceedings Volume 8675, 86750N (2013) https://doi.org/10.1117/12.2008197

KEYWORDS: Transducers, Computed tomography, Optical spheres, Breast, Spherical lenses, Data acquisition, Ultrasonography, Computing systems, Tomography, Computer simulations

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Proceedings Article | 25 February 2012 Paper

Automatic multimodal 2D/3D image fusion of ultrasound computer tomography and x-ray mammography for breast cancer diagnosis

Torsten Hopp, Neb Duric, Nicole Ruiter

Proceedings Volume 8320, 83200P (2012) https://doi.org/10.1117/12.911156

KEYWORDS: Mammography, Image fusion, Image registration, X-rays, Breast, Tissues, Computed tomography, Breast cancer, X-ray imaging, Signal attenuation

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Proceedings Article | 24 February 2012 Paper

Phantom image results of an optimized full 3D USCT

Nicole Ruiter, Michael Zapf, Torsten Hopp, Robin Dapp, Hartmut Gemmeke

Proceedings Volume 8320, 832005 (2012) https://doi.org/10.1117/12.911245

KEYWORDS: Breast, Ultrasonography, Point spread functions, 3D image processing, Computed tomography, Reflectivity, Tomography, Image resolution, Breast cancer, Spherical lenses

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Proceedings Article | 26 March 2011 Paper

2D/3D image fusion of x-ray mammograms with speed of sound images: evaluation and visualization

Torsten Hopp, Julie Bonn, Nicole Ruiter, Mark Sak, Neb Duric

Proceedings Volume 7968, 79680L (2011) https://doi.org/10.1117/12.877333

KEYWORDS: Mammography, Image fusion, X-rays, Breast, Image registration, X-ray imaging, Tissues, Visualization, Breast cancer, Finite element methods

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Proceedings Article | 11 March 2010 Paper

Registration of x-ray mammograms and three-dimensional speed of sound images of the female breast

Torsten Hopp, Marie Holzapfel, Nicole Ruiter, Cuiping Li, Neb Duric

Proceedings Volume 7629, 762905 (2010) https://doi.org/10.1117/12.843454

KEYWORDS: Mammography, X-rays, Breast, X-ray imaging, Image segmentation, 3D image processing, Image registration, Tissues, Finite element methods, 3D modeling

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Showing 5 of 34 publications

Conference Committee Involvement (3)

Ultrasonic Imaging and Tomography

16 February 2025 | San Diego, California, United States

Ultrasonic Imaging and Tomography

19 February 2024 | San Diego, California, United States

Ultrasonic Imaging and Tomography

22 February 2023 | San Diego, California, United States

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