
Proceedings Paper
Can motion compensated reconstruction improve 'best phase' reconstruction in Cardiac CT?Format | Member Price | Non-Member Price |
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Paper Abstract
Based on a phantom study with a realistic coronary vessel phantom, we investigated if motion compensated cardiac CT
reconstruction can improve best phase image quality with respect to motion artifacts and patency of coronary vessel
lumen. Basically, tracking based methods (with and without improvement of temporal resolution) deriving the motion
fields by a registration-like procedure are compared to optimization based methods optimizing objective functions while
minimizing artifact levels (e.g. Motion Artifact Metric Optimization (MAM) Reconstruction).
Using the MAM technique, the motion field is iteratively calculated with a steepest descent update equation minimizing
a motion artifact metric.
We evaluated patency of the vessel lumen, the normalized cross correlation (NCC) of the respective reconstruction data
with the ground truth data and a best phase improvement index correlating the motion compensated reconstruction data
to the non-compensated FDK-based reconstruction data. It will be shown that the MAM technique is superior to the
tracking methods. The latter proved to be more or less susceptible to template matching and, or erroneous template size.
The value of MAM is also demonstrated evaluating clinical data. In particular it is beneficial for patients with high heart
rates as well as for dose optimized scan protocols because it does not need over-radiation.
Paper Details
Date Published: 6 March 2013
PDF: 12 pages
Proc. SPIE 8668, Medical Imaging 2013: Physics of Medical Imaging, 86681T (6 March 2013); doi: 10.1117/12.2006323
Published in SPIE Proceedings Vol. 8668:
Medical Imaging 2013: Physics of Medical Imaging
Robert M. Nishikawa; Bruce R. Whiting; Christoph Hoeschen, Editor(s)
PDF: 12 pages
Proc. SPIE 8668, Medical Imaging 2013: Physics of Medical Imaging, 86681T (6 March 2013); doi: 10.1117/12.2006323
Show Author Affiliations
H. Bruder, Siemens Healthcare (Germany)
C. Rohkohl, Siemens Healthcare (Germany)
T. Allmendinger, Siemens Healthcare (Germany)
H. Schöndube, Siemens Healthcare (Germany)
C. Rohkohl, Siemens Healthcare (Germany)
T. Allmendinger, Siemens Healthcare (Germany)
H. Schöndube, Siemens Healthcare (Germany)
R. Raupach, Siemens Healthcare (Germany)
K. Stierstorfer, Siemens Healthcare (Germany)
T. Flohr, Siemens Healthcare (Germany)
K. Stierstorfer, Siemens Healthcare (Germany)
T. Flohr, Siemens Healthcare (Germany)
Published in SPIE Proceedings Vol. 8668:
Medical Imaging 2013: Physics of Medical Imaging
Robert M. Nishikawa; Bruce R. Whiting; Christoph Hoeschen, Editor(s)
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