Marco Maaß, M.Sc.

Research Associate


Institute for Signal Processing
University of Luebeck
Ratzeburger Allee 160
23562 Lübeck

Gebäude 64. 1. OG, Raum 30a

Email: marco.maass(at)dfki.de
Phone: +49 451 3101 5814

Arbeitsgebiet

Publications

2024

Marco Maaß, Tobias Kluth, Christine Droigk, Hannes Albers, Konrad Scheffler, Alfred Mertins, and Tobias Knopp,
Equilibrium Model With Anisotropy for Model-Based Reconstruction in Magnetic Particle Imaging, IEEE Transactions on Computational Imaging , vol. 10, pp. 1588--1601, Nov. 2024.
DOI:10.1109/TCI.2024.3490381
Bibtex: BibTeX
@ARTICLE{maass2024b,
  author={Maass, Marco and Kluth, Tobias and Droigk, Christine and Albers, Hannes and Scheffler, Konrad and Mertins, Alfred and Knopp, Tobias},
  journal={IEEE Transactions on Computational Imaging}, 
  title={Equilibrium Model With Anisotropy for Model-Based Reconstruction in Magnetic Particle Imaging}, 
  year={2024},
  volume={10},
  pages={1588--1601},
  doi={10.1109/TCI.2024.3490381},
}
Fabrice Katzberg, Marco Maaß, and Alfred Mertins,
Doppler Frequency Analysis for Sound-Field Sampling with Moving Microphones, Frontiers in Signal Processing , vol. 4:1304069, Apr. 2024.
DOI:10.3389/frsip.2024.1304069
Bibtex: BibTeX
@ARTICLE{katzberg2024,
  author = {Katzberg, Fabrice and Maass, Marco and Mertins, Alfred},
  title = {Doppler Frequency Analysis for Sound-Field Sampling with Moving Microphones},
  journal = {Frontiers in Signal Processing},
  year = {2024},
  volume = {4:1304069},
  month = {January},
}
Marco Maaß, Christine Droigk, Hannes Albers, Konrad Scheffler, Alfred Mertins, Tobias Kluth, and Tobias Knopp,
Magnetic particle imaging with non-oriented immobilized particles: Why the Langevin model of paramagnetism is sufficient, International Journal on Magnetic Particle Imaging , vol. 10, no. 1 Suppl. 1, Mar. 2024.
DOI:10.18416/IJMPI.2024.2403007

2023

Guido Stichtenoth, Niclas Knottnerus-Meyer, Jonas Helmstetter, Marco Maaß, and Egbert Herting,
The Derivation of Epigastric Motion to Assess Neonatal Breathing and Sleep: An Exploratory Study, Klinische Pädiatrie , no. EFirst, Sep. 2023. Georg Thieme Verlag.
DOI:10.1055/a-2135-2163
Christine Droigk, Marco Maaß, Mathias Eulers, and Alfred Mertins,
Adaption of direct Chebyshev reconstruction to an anisotropic particle model, International Journal on Magnetic Particle Imaging , vol. 9, no. 1 Suppl 1, Mar. 2023.
DOI:10.18416/IJMPI.2023.2303027
File: Droigk2023.pdf
Bibtex: BibTeX
@InProceedings{Droigk2023,
  author    = {Christine Droigk and Marco Maass and Mathias Eulers and Alfred Mertins},
  title     = {Adaption of direct Chebyshev reconstruction to an anisotropic particle model},
  journal={International Journal on Magnetic Particle Imaging},
  year = {2023},
  volume = {9},
  number = {1 Suppl 1},
 doi    = {10.18416/IJMPI.2023.2303027}
}
Marco Maaß, Christine Droigk, Mathias Eulers, and Alfred Mertins,
A system function component model for magnetic particle imaging with anisotropic particles, International Journal on Magnetic Particle Imaging , vol. 9, no. 1 Suppl 1, 2023.
DOI:10.18416/IJMPI.2023.2303076
Bibtex: BibTeX
@InProceedings{Maass2023,
  author    = {Marco Maass and Christine Droigk and Mathias Eulers and Alfred Mertins},
  title     = {A system function component model for magnetic particle imaging with anisotropic particles},
   journal={International Journal on Magnetic Particle Imaging},
  year = {2023},
  volume = {9},
  number = {1 Suppl 1},
  doi = {10.18416/IJMPI.2023.2303076},
}
Mathias Eulers, Christine Droigk, Marco Maaß, and Alfred Mertins,
Deconvolution of direct reconstructions for MPI using Convolutional Neural Network, International Journal on Magnetic Particle Imaging , vol. 9, no. 1 Suppl 1, 2023.
DOI:10.18416/IJMPI.2023.2303077
Bibtex: BibTeX
@InProceedings{Eulers2023,
  author    = {Mathias Eulers and Christine Droigk and Marco Maass and Alfred Mertins},
   title     = {Deconvolution of direct reconstructions for MPI using Convolutional Neural Network},
  journal={International Journal on Magnetic Particle Imaging},
  year = {2023},
  volume = {9},
  number = {1 Suppl 1},
doi = {10.18416/IJMPI.2023.2303077 }
}

2022

Christine Droigk, Marco Maaß, and Alfred Mertins,
System matrix compression using Chebyshev polynomials of first and second kind, International Journal on Magnetic Particle Imaging , vol. 8, no. 2, Dec. 2022.
DOI:10.18416/IJMPI.2022.2212003
File: Droigk2022_SystemMatrixCompression.pdf
Bibtex: BibTeX
@Article{Droigk2022b,
  author  = {Droigk, Christine and Maass, Marco and Mertins, Alfred},
  journal={International Journal on Magnetic Particle Imaging},
  title={System matrix compression using Chebyshev polynomials of first and second kind},
  year = {2022},
  doi    = {10.18416/IJMPI.2022.2212003},
  volume = {8},
  number = {2},
}
Fabrice Katzberg, Marco Maaß, René Pallenberg, and Alfred Mertins,
Positional Tracking of a Moving Microphone in Reverberant Scenes by Applying Perfect Sequences to Distributed Loudspeakers, in Proc. International Workshop on Acoustic Signal Enhancement (IWAENC) , Bamberg, Germany , Sep.2022.
File: katzberg2022.pdf
Bibtex: BibTeX
@InProceedings{katzberg2022,
  Title                    = {Positional Tracking of a Moving Microphone in Reverberant Scenes by Applying Perfect Sequences to Distributed Loudspeakers},
  Author                   = {Katzberg, Fabrice and Maass, Marco and Pallenberg, René and Mertins, Alfred},
  Booktitle                = {Proc. International Workshop on Acoustic Signal Enhancement (IWAENC)},
  Year                     = {2022},

  Address                  = {Bamberg, Germany},
  Month                    = {September},
}
Christine Droigk, Marco Maaß, and Alfred Mertins,
Direct multi-dimensional Chebyshev polynomial based reconstruction for magnetic particle imaging, Physics in Medicine & Biology , vol. 67, no. 4, pp. 045014, Feb. 2022.
DOI:10.1088/1361-6560/ac4c2e
File: Droigk2022_DirectMultidimensionalChebyshevReconstruction.pdf
Bibtex: BibTeX
@Article{Droigk2022a,
  author  = {Droigk, Christine and Maass, Marco and Mertins, Alfred},
  journal = {Physics in Medicine & Biology},
  title   = {Direct multi-dimensional Chebyshev polynomial based reconstruction for magnetic particle imaging},
  year = {2022},
  doi    = {10.1088/1361-6560/ac4c2e},
  volume = {67},
  number = {4},
  pages = {045014},
}
Marco Maaß, Christine Droigk, Mathias Eulers, and Alfred Mertins,
An analytical equilibrium solution to the Néel relaxation Fokker-Planck equation, International Journal on Magnetic Particle Imaging , vol. 8, no. 1 Suppl 1, pp. 1--4, 2022.
DOI:10.18416/IJMPI.2022.2203008
Bibtex: BibTeX
@InProceedings{Maass2022N,
     author = {Maass, Marco and Droigk, Christine  and Eulers, Mathias and Mertins, Alfred},
     title = {An analytical equilibrium solution to the Néel relaxation Fokker-Planck equation},
     year = {2022},
     volume = {8},
     number = {1 Suppl 1},
     pages = {1--4},
     doi = {10.18416/IJMPI.2022.2203008},
     journal = {International Journal on Magnetic Particle Imaging},
 }

2021

Fabrice Katzberg, Marco Maaß, and Alfred Mertins,
Coherence Based Trajectory Optimization for Compressive Sensing of Sound Fields, in Proc. 29th European Signal Processing Conference (EUSIPCO) , Dublin, Ireland , Aug.2021.
File: katzberg2021b.pdf
Bibtex: BibTeX
@InProceedings{katzberg2021b,
  Title                    = {Coherence Based Trajectory Optimization for Compressive Sensing of Sound Fields},
  Author                   = {Katzberg, Fabrice and Maass, Marco and Mertins, Alfred},
  Booktitle                = {Proc. 29th European Signal Processing Conference (EUSIPCO)},
  Year                     = {2021},
  Address                  = {Dublin, Ireland},
  Month                    =  {August},
}
Fabrice Katzberg, Marco Maaß, and Alfred Mertins,
Spherical Harmonic Representation for Dynamic Sound-Field Measurements, in Proc. IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP) , Toronto, Canada , Jun.2021.
File: katzberg2021a.pdf
Bibtex: BibTeX
@InProceedings{katzberg2021a,
  Title                    = {Spherical Harmonic Representation for Dynamic Sound-Field Measurements},
  Author                   = {Katzberg, Fabrice and Maass, Marco and Mertins, Alfred},
  Booktitle                = {Proc. IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP)},
  Year                     = {2021},
  Address                  = {Toronto, Canada},
  Month                    =  {June},
}
Philipp Koch, Kamran Mohammad-Zadeh, Marco Maaß, Mark Dreier, Ole Thomsen, Tim J. Parbs, Huy Phan, and Alfred Mertins,
sEMG-Based Hand Movement Regression by Prediction of Joint Angles With Recurrent Neural Networks, in 43nd Annual International Conference of the IEEE Engineering in Medicine \& Biology Society (EMBC) , 2021. pp. 6519--6523.
DOI:10.1109/EMBC46164.2021.9630042
Bibtex: BibTeX
@InProceedings{Koch2021,
  author    = {Koch, Philipp and Mohammad-Zadeh, Kamran and Maass, Marco and Dreier, Mark and Thomsen, Ole and Parbs, Tim J. and Phan, Huy and Mertins, Alfred},
  title     = {sEMG-Based Hand Movement Regression by Prediction of Joint Angles With Recurrent Neural Networks},
  booktitle = {43nd Annual International Conference of the IEEE Engineering in Medicine \& Biology Society (EMBC)},
  year      = {2021},
  pages     = {6519--6523},
doi = {10.1109/EMBC46164.2021.9630042},
}

2020

M. Maaß, C. Droigk, and A. Mertins,
A novel representation of the MPI system function, International Journal on Magnetic Particle Imaging , vol. 6, no. 1 Suppl 1, Sep. 2020.
DOI:10.18416/IJMPI.2020.2009050
Bibtex: BibTeX
@InProceedings{maass2020b,
  author    = {Maass, M. and Droigk, C. and Mertins, A.},
  title     = {A novel representation of the MPI system function},
     year = {2020},
     volume = {6},
     number = {1 Suppl 1},
     doi = {10.18416/IJMPI.2020.2009050},
     journal = {International Journal on Magnetic Particle Imaging},
 }

M. Maaß, C. Droigk, F. Katzberg, P. Koch, and A. Mertins,
A Recovery Algorithm based on the Kaczmarz Algorithm and ADMM Splitting with Application to Convex Optimization in Magnetic Particle Imaging, in 28th European Signal Processing Conference (EUSIPCO 2020) , Sep.2020. pp. 2135--2139.
File: maass2020c.pdf
Bibtex: BibTeX
@InProceedings{maass2020c,
  author    = {Maass, M. and Droigk, C. and Katzberg, F. and Koch, P. and Mertins, A.},
  booktitle = {28th European Signal Processing Conference (EUSIPCO 2020)},
  title     = {A Recovery Algorithm based on the Kaczmarz Algorithm and ADMM Splitting with Application to Convex Optimization in Magnetic Particle Imaging},
  month = {September},
  year      = {2020},
  pages    = {2135--2139},
}
Christine Droigk, Marco Maaß, and Alfred Mertins,
An upper bound for the frequency dependent energy of the 2-dimensional system function, International Journal on Magnetic Particle Imaging , vol. 6, no. 2 Suppl 1, Sep. 2020.
DOI:10.18416/IJMPI.2020.2009018
Bibtex: BibTeX
@InProceedings{droigk2020a,
  author    = {Droigk, Christine and Maass, Marco and Mertins, Alfred},
  title     = {An upper bound for the frequency dependent energy of the 2-dimensional system function},
journal = {International Journal on Magnetic Particle Imaging},
volume={6},
  number={2 Suppl 1},
  year      = {2020},
  month     = {September},
doi = {10.18416/IJMPI.2020.2009018}
}
M. Maaß, C. Droigk, and A. Mertins,
MPI reconstruction using Bessel functions, International Journal on Magnetic Particle Imaging , vol. 6, no. Suppl 1, Sep. 2020.
DOI:10.18416/IJMPI.2020.2009017
Bibtex: BibTeX
@InProceedings{maass2020a,
  author    = {Maass, M. and Droigk, C. and Mertins, A.},
  title     = {MPI reconstruction using Bessel functions},
  year      = {2020},
  journal = {International Journal on Magnetic Particle Imaging},
  volume = {6},
  number = {1 Suppl 1},
  doi = {10.18416/IJMPI.2020.2009017},
  month     = {September},
}
Marco Maaß, and Alfred Mertins,
On the Representation of Magnetic Particle Imaging in Fourier Space, International Journal on Magnetic Particle Imaging , vol. 6, no. 1, 2020.
File: maass2019b.pdf
Bibtex: BibTeX
@article{maass2019b,
	author = {Maass, Marco and Mertins, Alfred },
	title = {On the Representation of Magnetic Particle Imaging in Fourier Space},
	journal = {International Journal on Magnetic Particle Imaging},
	volume = {6},
	number = {1},
	year = {2020}
}
Philipp Koch, Mark Dreier, Anna Larsen, Tim J. Parbs, Marco Maaß, Huy Phan, and Alfred Mertins,
Regression of Hand Movements from sEMG Data with Recurrent Neural Networks, in 42nd Annual International Conference of the IEEE Engineering in Medicine \& Biology Society (EMBC) , 2020. pp. 3783--3787.
Bibtex: BibTeX
@InProceedings{Koch2020a,
  author    = {Koch, Philipp and Dreier, Mark and Larsen, Anna and Parbs, Tim J. and Maass, Marco and Phan, Huy and Mertins, Alfred},
  title     = {Regression of Hand Movements from sEMG Data with Recurrent Neural Networks},
  booktitle = {42nd Annual International Conference of the IEEE Engineering in Medicine \& Biology Society (EMBC)},
  year      = {2020},
  pages     = {3783--3787},
}
Philipp Koch, Mark Dreier, Marco Maaß, Huy Phan, and Alfred Mertins,
RNN With Stacked Architecture for sEMG based Sequence-to-Sequence Hand Gesture Recognition, in 28th European Signal Processing Conference (EUSIPCO) , 2020. pp. 1600-1604.
Bibtex: BibTeX
@InProceedings{Koch2020b,
  author    = {Koch, Philipp and Dreier, Mark and Maass, Marco and Phan, Huy and Mertins, Alfred},
  title     = {RNN With Stacked Architecture for sEMG based Sequence-to-Sequence Hand Gesture Recognition},
  booktitle = {28th European Signal Processing Conference (EUSIPCO)},
  year      = {2020},
  pages     = {1600-1604},
}
Alfred Mertins, Marco Maaß, and Fabrice Katzberg,
Room Impulse Response Reshaping and Crosstalk Cancellation Using Convex Optimization, IEEE/ACM Transactions on Audio, Speech, and Language Processing , vol. 29, pp. 489--502, 2020. IEEE.
Bibtex: BibTeX
@article{mertins2020room,
  title={Room Impulse Response Reshaping and Crosstalk Cancellation Using Convex Optimization},
  author={Mertins, Alfred and Maass, Marco and Katzberg, Fabrice},
  journal={IEEE/ACM Transactions on Audio, Speech, and Language Processing},
  volume={29},
  pages={489--502},
  year={2020},
  publisher={IEEE}
}

2019

Christine Droigk, Marco Maaß, and Alfred Mertins,
Multiresolution vessel detection in magnetic particle imaging using wavelets and a Gaussian mixture model, International Journal of Computer Assisted Radiology and Surgery , vol. 14, no. 11, pp. 1913-1921, Nov. 2019.
DOI:10.1007/s11548-019-02079-w
Bibtex: BibTeX
@article{droigk2019c,
author={Droigk, Christine and Maass, Marco and Mertins, Alfred},
title={Multiresolution vessel detection in magnetic particle imaging using wavelets and a Gaussian mixture model},
journal={International Journal of Computer Assisted Radiology and Surgery},
year={2019},
month={November},
day={01},
volume={14},
number={11},
pages={1913-1921},
abstract={Magnetic particle imaging is a tomographic imaging technique that allows one to measure the spatial distribution of superparamagnetic nanoparticles, which are used as tracer. The magnetic particle imaging scanner measures the voltage induced due to the nonlinear magnetization behavior of the nanoparticles. The tracer distribution can be reconstructed from the voltage signal by solving an inverse problem. A possible application is the imaging of vessel structures. In this and many other cases, the tracer is only located inside the structures and a large part of the image is related to background. A detection of the tracer support in early stages of the reconstruction process could improve reconstruction results.},
issn={1861-6429},
doi={10.1007/s11548-019-02079-w}
}
Anita Möller, Marco Maaß, Tim Jeldrik Parbs, and Alfred Mertins,
Blind Sparsity Based Motion Estimation and Correction Model for Arbitrary MRI Sampling Trajectories, in Proceedings of the 27th {Joint} {Annual} {Meeting} of {ISMRM} , Montreal, Canada , May2019. pp. 4496.
File: ismrm19moeller.pdf
Bibtex: BibTeX
@INPROCEEDINGS{moeller2019,
author = {Möller, Anita and Maass, Marco and Parbs, Tim Jeldrik and Mertins, Alfred},
title = {Blind Sparsity Based Motion Estimation and Correction Model for Arbitrary MRI Sampling Trajectories},
booktitle = {Proceedings of the 27th {Joint} {Annual} {Meeting} of {ISMRM}},
pages = {4496},
year = {2019},
address = {Montreal, Canada},
month = {May},
url ={https://index.mirasmart.com/ISMRM2019/PDFfiles/4496.html}
}
P. Koch, N. Brügge, H. Phan, M. Maaß, and A. Mertins,
Forked Recurrent Neural Network for Hand Gesture Classification Using Inertial Measurement Data, in Proc. 44 th IEEE Intl. Conf. on Acoustics, Speech and Signal Processing (ICASSP 2019) , Brighton, UK , May2019.
Bibtex: BibTeX
@InProceedings{Koch2019b,
  author    = {Koch, P. and Brügge, N. and Phan, H. and Maass, M. and Mertins, A.},
  title     = {Forked Recurrent Neural Network for Hand Gesture Classification Using Inertial Measurement Data},
  booktitle = {Proc. 44 th IEEE Intl. Conf. on Acoustics, Speech and Signal Processing (ICASSP 2019)},
  year      = {2019},
  address   = {Brighton, UK},
  month     = {May},
}