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Publisher DOI: 10.18416/ijmpi.2017.1703011
Title: Submillimeter-Accurate Marker Localization within Low Gradient Magnetic Particle Imaging Tomograms
Language: English
Authors: Griese, Florian  
Knopp, Tobias 
Werner, René 
Schlaefer, Alexander 
Möddel, Martin  
Issue Date: 23-Mar-2017
Publisher: Infinite Science Publishing
Source: International Journal on Magnetic Particle Imaging Vol 3, No 1, Article ID 1703011
Journal: International journal on magnetic particle imaging 
Abstract (english): 
Magnetic Particle Imaging (MPI) achieves a high temporal resolution, which opens up a wide range of real-time medical applications such as device tracking and navigation. These applications usually rely on automated techniques for finding and localizing devices and fiducial markers in medical images. In this work, we show that submillimeter-accurate automatic marker localization from low gradient MPI tomograms with a spatial resolution of several millimeters is possible. Markers are initially identified within the tomograms by a thresholding-based segmentation algorithm. Subsequently, their positions are accurately determined by calculating the center of mass of the gray values inside the pre-segmented regions. A series of phantom measurements taken at full temporal resolution (46 Hz) is used to analyze statistical and systematical errors and to discuss the performance and stability of the automatic submillimeter-accurate marker localization algorithm.
DOI: 10.15480/882.3244
ISSN: 2365-9033
Institute: Medizintechnische und Intelligente Systeme E-1 
Document Type: Article
Project: Ganzkörper Magnetic-Particle-Imaging Messsequenzen 
More Funding information: Deutsche Forschungsgemeinschaft AD 125/5-1
License: CC BY 4.0 (Attribution) CC BY 4.0 (Attribution)
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