Synopsis

Keywords: Image acquisition: Modelling, Image acquisition: Motion correction, Image acquisition: Reconstruction

This educational lecture covers mathematical models used to describe patient motion, how different models are used for different applications, and connects motion modelling to data acquisition and reconstruction. The talk will begin with an overview of model based image reconstruction (MBIR) assuming no motion. Next, we will cover choices for modeling motion within MBIR, including rigid vs. non-rigid, types of k-space navigators, temporal modeling (intra-image vs. inter-image), and periodic vs. non-periodic motion. The talk will also discuss how each of these choices affect the objective functions, regularizers, and optimization algorithms used in the iterative model-based image reconstruction.

Overview

This educational lecture covers mathematical models used to describe patient motion, how different models are used for different applications, and connects motion modelling to data acquisition and reconstruction. The talk will begin with an overview of model based image reconstruction (MBIR) assuming no motion. Next, we will cover choices for modeling motion within MBIR, including rigid vs. non-rigid, types of k-space navigators, temporal modeling (intra-image vs. inter-image), and periodic vs. non-periodic motion. The talk will also discuss how each of these choices affect the objective functions, regularizers, and optimization algorithms used in the iterative model-based image reconstruction.

Relevant Literature

F Godenschweger et al. “Motion correction in MRI of the brain” 2016 Phys. Med. Biol. 61 R32, DOI 10.1088/0031-9155/61/5/R32.
Maxim Zaitsev, et al. “Motion Artifacts in MRI: A Complex Problem With Many Partial Solutions “ Journal of Magnetic Resonance Imaging, 2015; 42:887–901, doi: 10.1002/jmri.24850.
J. A. Fessler, "Model-Based Image Reconstruction for MRI," in IEEE Signal Processing Magazine, vol. 27, no. 4, pp. 81-89, July 2010, doi: 10.1109/MSP.2010.936726.

Acknowledgements

No acknowledgement found.

References

No reference found.