NDLI: Automated motion artifacts removal between cardiac long- and short-axis magnetic resonance images

Content Provider	IEEE Xplore Digital Library
Author	Carminati, M.C. Maffessanti, F. Caiani, E.G.
Copyright Year	2012
Description	Author affiliation: Centro Cardiologico Monzino, IRCSS, Milano, Italy (Maffessanti, F.) \|\| Biomedical Engineering Department, Politecnico di Milano, Milano, Italy (Carminati, M.C.; Caiani, E.G.)
Abstract	We aimed at developing and testing an automated method for motion artifacts compensation, to reduce potential misalignment between short-axis (SAX) and two-and four-chamber long-axis (2ch4chLAX) cardiac magnetic resonance (CMR) images that could introduce artifacts in advanced 3D volumetric analysis, thus precluding accurate measurements. Each SAX slice of the CMR dataset is shifted by optimizing normalized cross correlation of pixel intensities at slice intersection with 2ch4chLAX. The algorithm accuracy has been tested in a dedicated phantom study and applied to a clinical dataset consisting of end diastolic (ED) and end systolic (ES) CMR SAX and 2ch4chLAX frames obtained in 10 consecutive patients. The algorithm performance evaluated on the phantom dataset provided the residual displacement error after images correction (range values 0–2.5 mm), with registration errors comparable with the pixel resolution. Application to clinical data, comparing by visual inspection the results with and without correction, resulted in a perceived improvement in 52.9% of the analyzed frames, thus proving feasibility and usefulness of the method as a necessary pre-processing step for volumetric analysis of CMR data in clinical setting.
Starting Page	689
Ending Page	692
File Size	579767
Page Count	4
File Format	PDF
ISBN	9781467320764
ISSN	2325887X
e-ISBN	9781467320771
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2012-09-09
Publisher Place	Poland
Access Restriction	Subscribed
Rights Holder	Creative Commons Attribution License 2.5 (CCAL)
Subject Keyword	Phantoms Computed tomography Image resolution Heart Correlation Visualization Data visualization
Content Type	Text
Resource Type	Article
Subject	Computer Science Cardiology and Cardiovascular Medicine

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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