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Proceedings Paper

Optimized knowledge-based motion correction of fMRI time series using parallel algorithms
Author(s): Thomas Schmidt; Stephan G. Erberich; Martin Hoppe; Christian Jansen; Armin Thron; Walter Oberschelp
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Paper Abstract

The structure of an fMRI time series coregistration algorithm can be divided into modules (preprocessing, minimization procedure, interpolation method, cost function), for each of which there are many different approaches. In our study we implemented some of the most recent techniques and compared their combinations with regard to both registration accuracy and runtime performance. Bidirectional inconsistency and difference image analysis served as quality measures. The result shows that with an appropriate choice of methods realignment results can be improved by far compared with standard solutions. Finally, an automatic parameter adaptation method was incorporated. Additionally, the algorithm was implemented to run on a distributed 48 processor PC cluster, surpassing the performance of conventional applications running on high end workstations.

Paper Details

Date Published: 21 May 2001
PDF: 12 pages
Proc. SPIE 4321, Medical Imaging 2001: Physiology and Function from Multidimensional Images, (21 May 2001); doi: 10.1117/12.428155
Show Author Affiliations
Thomas Schmidt, Rheinisch-Westfaelische Technische Hochschule Aachen Univ. Hospital (Germany)
Stephan G. Erberich, Rheinisch-Westfaelische Technische Hochschule Aachen Univ. Hospital (United States)
Martin Hoppe, Rheinisch-Westfaelische Technische Hochschule Aachen Univ. Hospital (Germany)
Christian Jansen, Rheinisch-Westfaelische Technische Hochschule Aachen Univ. Hospital (Switzerland)
Armin Thron, Rheinisch-Westfaelische Technische Hochschule Aachen Univ. Hospital (Germany)
Walter Oberschelp, Rheinisch-Westfaelische Technische Hochschule Aachen Univ. (Germany)


Published in SPIE Proceedings Vol. 4321:
Medical Imaging 2001: Physiology and Function from Multidimensional Images
Chin-Tu Chen; Anne V. Clough, Editor(s)

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