2019

• Steinhoff, M., Nehrke, K., Mertins, A. and Börnert, P.: Self-navigated Half-Fourier Multi-shot Echo-planar DWI Reconstructions for Brain Imaging in Proceedings of the 27th Joint Annual Meeting of ISMRM, Montréal, QC, Canada, 2019
  

  @inproceedings{steinhoff_self-navigated_2019,
  	address = {Montréal, QC, Canada},
  	title = {Self-navigated {Half}-{Fourier} {Multi}-shot {Echo}-planar {DWI} {Reconstructions} for {Brain} {Imaging}},
  	url = {https://index.mirasmart.com/ISMRM2019/PDFfiles/3345.html},
  	abstract = {EPI trajectories using Half-Fourier achieve shorter echo times and therefore higher SNR, which is especially desirable in low-SNR applications like diffusion-weighted MRI. For the same reason, methods enabling phase-corrected image recovery for multi-shot diffusion acquisitions have been intensively studied for both spiral and EPI trajectories. In this work, two algorithms are presented comprising both half-Fourier and the multi-shot same-magnitude constraints to exploit the advantages of both techniques. The algorithms are shown to robustly recover interleaved half-Fourier datasets from in-vivo brain acquisitions.},
  	booktitle = {Proceedings of the 27th {Joint} {Annual} {Meeting} of {ISMRM}},
  	author = {Steinhoff, Malte and Nehrke, Kay and Mertins, Alfred and Börnert, Peter},
  	year = { 2019}
  }

• Steinhoff, M., Nehrke, K., Mertins, A. and Börnert, P.: Multi-shot Diffusion EPI Reconstruction with Iterative Rigid Motion-correction and Motion-induced Phase-correction for Brain Imaging in Proceedings of the 27th Joint Annual Meeting of ISMRM, Montréal, QC, Canada, 2019
  

  @inproceedings{steinhoff_multi-shot_2019,
  	address = {Montréal, QC, Canada},
  	title = {Multi-shot {Diffusion} {EPI} {Reconstruction} with {Iterative} {Rigid} {Motion}-correction and {Motion}-induced {Phase}-correction for {Brain} {Imaging}},
  	url = {https://index.mirasmart.com/ISMRM2019/PDFfiles/3346.html},
  	abstract = {Multi-shot diffusion-weighted imaging offers increased SNR and higher resolution, but makes the acquisition vulnerable to shot-specific phase variations and macroscopic inter-shot motion. A wide range of iterative phase-corrected reconstruction schemes have been proposed to overcome the inter-shot phase inconsistencies, but robust motion estimation is still challenging due to the inherently low SNR of DWI. This work moves forward from initial one-time rigid motion estimation to an alternating optimization balancing the joint image, phase and motion estimation. A novel multi-shot echo-planar diffusion algorithm with iterative motion and phase correction is presented in simulations and in-vivo.},
  	booktitle = {Proceedings of the 27th {Joint} {Annual} {Meeting} of {ISMRM}},
  	author = {Steinhoff, Malte and Nehrke, Kay and Mertins, Alfred and Börnert, Peter},
  	year = { 2019}
  }

• Steinhoff, M., Nehrke, K., Mertins, A. and Börnert, P.: Accelerating Iterative SENSE-based Algorithms for Cartesian Trajectories using the Point Spread Function and Coil Compression in Proceedings of the 27th Joint Annual Meeting of ISMRM, Montréal, QC, Canada, 2019
  

  @inproceedings{steinhoff_accelerating_2019,
  	address = {Montréal, QC, Canada},
  	title = {Accelerating {Iterative} {SENSE}-based {Algorithms} for {Cartesian} {Trajectories} using the {Point} {Spread} {Function} and {Coil} {Compression}},
  	url = {https://index.mirasmart.com/ISMRM2019/PDFfiles/3347.html},
  	abstract = {For multi-shot diffusion-weighted imaging, iterative SENSE-based algorithms like POCSMUSE are boosting SNR allowing for higher image resolution. These advantages are achieved at the cost of higher computational load, thereby narrowing the clinical use case. The Cartesian implementation of such SENSE algorithms iteratively involves time-consuming 1D-Fast Fourier Transforms. In this abstract, the well-known point spread function for regular Cartesian undersampling is exploited to accelerate gradient- and projection-based SENSE updates. Accelerations of approximately 45\% were achieved. Furthermore, coil compression is evaluated for these algorithms.},
  	booktitle = {Proceedings of the 27th {Joint} {Annual} {Meeting} of {ISMRM}},
  	author = {Steinhoff, Malte and Nehrke, Kay and Mertins, Alfred and Börnert, Peter},
  	year = { 2019}
  }