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364 results on '"Meyer, Manfred"'

2. TotalSegmentator: robust segmentation of 104 anatomical structures in CT images

Author

Wasserthal, Jakob, Breit, Hanns-Christian, Meyer, Manfred T., Pradella, Maurice, Hinck, Daniel, Sauter, Alexander W., Heye, Tobias, Boll, Daniel, Cyriac, Joshy, Yang, Shan, Bach, Michael, and Segeroth, Martin

Subjects
Electrical Engineering and Systems Science - Image and Video Processing, Computer Science - Computer Vision and Pattern Recognition
Abstract

We present a deep learning segmentation model that can automatically and robustly segment all major anatomical structures in body CT images. In this retrospective study, 1204 CT examinations (from the years 2012, 2016, and 2020) were used to segment 104 anatomical structures (27 organs, 59 bones, 10 muscles, 8 vessels) relevant for use cases such as organ volumetry, disease characterization, and surgical or radiotherapy planning. The CT images were randomly sampled from routine clinical studies and thus represent a real-world dataset (different ages, pathologies, scanners, body parts, sequences, and sites). The authors trained an nnU-Net segmentation algorithm on this dataset and calculated Dice similarity coefficients (Dice) to evaluate the model's performance. The trained algorithm was applied to a second dataset of 4004 whole-body CT examinations to investigate age dependent volume and attenuation changes. The proposed model showed a high Dice score (0.943) on the test set, which included a wide range of clinical data with major pathologies. The model significantly outperformed another publicly available segmentation model on a separate dataset (Dice score, 0.932 versus 0.871, respectively). The aging study demonstrated significant correlations between age and volume and mean attenuation for a variety of organ groups (e.g., age and aortic volume; age and mean attenuation of the autochthonous dorsal musculature). The developed model enables robust and accurate segmentation of 104 anatomical structures. The annotated dataset (https://doi.org/10.5281/zenodo.6802613) and toolkit (https://www.github.com/wasserth/TotalSegmentator) are publicly available., Comment: Accepted at Radiology: Artificial Intelligence

Published
2022
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4. TotalSegmentator: Robust Segmentation of 104 Anatomic Structures in CT Images

Author

Wasserthal, Jakob, primary, Breit, Hanns-Christian, additional, Meyer, Manfred T., additional, Pradella, Maurice, additional, Hinck, Daniel, additional, Sauter, Alexander W., additional, Heye, Tobias, additional, Boll, Daniel T., additional, Cyriac, Joshy, additional, Yang, Shan, additional, Bach, Michael, additional, and Segeroth, Martin, additional

Published
2023
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5. Scientific detector workshop 2022 on‐sky performance verification of near‐infrarede − APDtechnology for wavefront sensing and demonstration ofe − APDpixel performance to improve the sensitivity of large science focal planes

Author

Finger, Gert, primary, Eisenhauer, Frank, additional, Genzel, Rainer, additional, Mandla, Christopher, additional, Baker, Ian, additional, Alvarez, Domingo, additional, Amorim, Antonio, additional, Brandner, Wolfgang, additional, Dupuy, Christophe, additional, Deen, Casey, additional, Ives, Derek, additional, Mehrgan, Leander, additional, Meyer, Manfred, additional, Perraut, Karin, additional, Perrin, Guy, additional, Stegmeier, Jörg, additional, Straubmeier, Christian, additional, Weller, Harald J., additional, and Isgar, Vincent, additional

Published
2023
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8. Scientific detector workshop 2022 on‐sky performance verification of near‐infrared e−APD technology for wavefront sensing and demonstration of e−APD pixel performance to improve the sensitivity of large science focal planes

Author

Finger, Gert, Eisenhauer, Frank, Genzel, Reinhard, Mandla, Christopher, Baker, Ian, Alvarez, Domingo, Amorim, Antonio, Brandner, Wolfgang, Dupuy, Christophe, Deen, Casey, Ives, Derek, Mehrgan, Leander, Meyer, Manfred, Perraut, Karin, Perrin, Guy, Stegmeier, Jörg, Straubmeier, Christian, Weller, Harald J., and Isgar, Vincent

Subjects
FOCAL planes, PIXELS, SPECTRAL sensitivity, WAVEFRONT sensors, ADAPTIVE optics, DETECTORS, GRAVITY
Abstract

Near‐infrared adaptive optics as well as fringe tracking for coherent beam combination in optical interferometry require the development of high‐speed sensors. Because of the high speed, a large analog bandwidth is required. The short exposure times result in small signal levels which require noiseless detection. Both requirements cannot be met by state‐of‐the‐art conventional CMOS technology of near‐infrared arrays as has been attempted previously. A total of five near‐infrared SAPHIRA 320 × 256 pixel HgCdTe e−APD arrays have been deployed in the wavefront sensors and in the fringe tracker of the VLTI instrument GRAVITY. The current limiting magnitude for coherent exposures with GRAVITY is mk = 19, which is made possible with ADP technology. New avalanche photo‐diode array (APD) developments since GRAVITY include the extension of the spectral sensitivity to the wavelength range from 0.8 to 2.5 μm. After GRAVITY a larger format array with 512 × 512 pixels has been developed for both AO applications at the ELT and for long integration times. Since dark currents of <10−3 e−/s have been demonstrated with 1Kx1K e−APD arrays and 2Kx2K e−APD arrays have already been developed, the possibilities and adaptations of e−APD technology to provide noiseless large‐format science‐grade arrays for long integration times are also discussed. [ABSTRACT FROM AUTHOR]

Published
2023
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11. NGC Detector Array Controller Based on High Speed Serial Link Technology

Author

Meyer, Manfred, Baade, Dietrich, Balestra, Andrea, Cumani, Claudio, Deiries, Sebastian, Geimer, Christoph, Dorn, Reinhold J., Eschbaumer, Siegfried, Finger, Gert, Mehrgan, Leander H., Moorwood, Alan, Reiss, Roland, Reyes, Javier, Stegmeier, Joerg, Beletic, Jenna E., editor, Beletic, James W., editor, and Amico, Paola, editor

Published
2006
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14. A Dedicated L3Vision CCD for Adaptive Optics Applications

Author

Downing, Mark, Hubin, Norbert, Kasper, Markus, Jorden, Paul, Pool, Peter, Denney, Sandy, Suske, Wolfgang, Burt, David, Wheeler, Pat, Hadfield, Kevin, Feautrier, Philippe, Gach, Jean-Luc, Reyes, Javier, Meyer, Manfred, Baade, Dietrich, Balard, Philippe, Guillaume, Christian, Stadler, Eric, Boissin, Olivier, Fusco, Thierry, Diaz, José Javier, Beletic, Jenna E., editor, Beletic, James W., editor, and Amico, Paola, editor

Published
2006
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15. Slicing the Universe - CCDs for MUSE

Author

Reiss, Roland, Deiries, Sebastian, Lizon, Jean Louis, Meyer, Manfred, Reyes, Javier, Bacon, Roland, Hénault, François, Loupias, Magali, Beletic, Jenna E., editor, Beletic, James W., editor, and Amico, Paola, editor

Published
2006
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17. Test Results with 2K×2K MCT Arrays

Author

Finger, Gert, Dorn, Reinhold J., Mehrgan, Hamid, Meyer, Manfred, Moorwood, Alan F.M., Stegmeier, Joerg, Burton, W. B., editor, Kuijpers, J. M. E., editor, Van Den Heuvel, E. P. J., editor, Van Der Laan, H., editor, Amico, Paola, editor, Beletic, James W., editor, and Beletic, Jenna E., editor

Published
2004
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19. IR Detector Developments at Eso

Author

Finger, Gert, Dorn, Reinhold J., Mehrgan, Hamid, Meyer, Manfred, Moorwood, Alan F.M., Stegmeier, Joerg, Burton, W. B., editor, Kuijpers, J. M. E., editor, Van Den Heuvel, E. P. J., editor, Van Der Laan, H., editor, Amico, Paola, editor, Beletic, James W., editor, and Beletic, Jenna E., editor

Published
2004
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31. OCam with CCD220, the Fastest and Most Sensitive Camera to Date for AO Wavefront Sensing

Author

Feautrier, Philippe, Gach, Jean-Luc, Balard, Philippe, Guillaume, Christian, Downing, Mark, Hubin, Norbert, Stadler, Eric, Magnard, Yves, Skegg, Michael, Robbins, Mark, Denney, Sandy, Suske, Wolfgang, Jorden, Paul, Wheeler, Patrick, Pool, Peter, Bell, Ray, Burt, David, Davies, Ian, Reyes, Javier, Meyer, Manfred, Baade, Dietrich, Kasper, Markus, Arsenault, Robin, Fusco, Thierry, and Diaz Garcia, José Javier

Published
2011
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32. O

Author

Dittrich, Klaus R., Ferstl, Otto K., Schäffer, Bruno, Winter, Robert, Ghanei, Azita, Chamoni, Peter, Schwarzer, Bettina, Janko, Wolfgang, Meyer, Manfred, Czap, Hans, Suhl, Uwe, Suhl, Leena, Remme, Markus, Amsüss, Wolfgang L., Heinzl, Armin, Mertens, Peter, editor, Back, Andrea, editor, Becker, Jörg, editor, König, Wolfgang, editor, Krallmann, Hermann, editor, Rieger, Bodo, editor, Scheer, August-Wilhelm, editor, Seibt, Dietrich, editor, Stahlknecht, Peter, editor, Strunz, Horst, editor, Thome, Rainer, editor, Wedekind, Hartmut, editor, and Engelhardt, Andrea, editor

Published
1997
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37. A WAM compilation scheme

Author

Hein, Hans -Günther, Meyer, Manfred, Siekmann, J., editor, Goos, G., editor, Hartmanis, J., editor, and Voronkov, A., editor

Published
1992
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