PMID- 21519102
OWN - NLM
STAT- MEDLINE
DCOM- 20120912
LR  - 20120629
IS  - 1941-0506 (Electronic)
IS  - 1077-2626 (Linking)
VI  - 18
IP  - 6
DP  - 2012 Jun
TI  - Analysis of time-dependent flow-sensitive PC-MRI data.
PG  - 966-77
LID - 10.1109/TVCG.2011.80 [doi]
AB  - Many flow visualization techniques, especially integration-based methods, are 
      problematic when the measured data exhibit noise and discretization issues. 
      Particularly, this is the case for flow-sensitive phase-contrast magnetic 
      resonance imaging (PC-MRI) data sets which not only record anatomic information, 
      but also time-varying flow information. We propose a novel approach for the 
      visualization of such data sets using integration-based methods. Our ideas are 
      based upon finite-time Lyapunov exponents (FTLE) and enable identification of 
      vessel boundaries in the data as high regions of separation. This allows us to 
      correctly restrict integration-based visualization to blood vessels. We validate 
      our technique by comparing our approach to existing anatomy-based methods as well 
      as addressing the benefits and limitations of using FTLE to restrict flow. We 
      also discuss the importance of parameters, i.e., advection length and data 
      resolution, in establishing a well-defined vessel boundary. We extract 
      appropriate flow lines and surfaces that enable the visualization of blood flow 
      within the vessels. We further enhance the visualization by analyzing flow 
      behavior in the seeded region and generating simplified depictions.
FAU - Krishnan, Harinarayan
AU  - Krishnan H
AD  - University of California, Davis, Davis, CA 95616, USA. hkrishnan@ucdavis.edu
FAU - Garth, Christoph
AU  - Garth C
FAU - Guhring, Jens
AU  - Guhring J
FAU - Gulsun, M Akif
AU  - Gulsun MA
FAU - Greiser, Andreas
AU  - Greiser A
FAU - Joy, Kenneth I
AU  - Joy KI
LA  - eng
PT  - Journal Article
PT  - Research Support, U.S. Gov't, Non-P.H.S.
PL  - United States
TA  - IEEE Trans Vis Comput Graph
JT  - IEEE transactions on visualization and computer graphics
JID - 9891704
SB  - IM
MH  - Algorithms
MH  - Blood Flow Velocity
MH  - *Computer Graphics
MH  - Humans
MH  - Image Processing, Computer-Assisted/*methods
MH  - Magnetic Resonance Angiography/*methods
MH  - *Models, Cardiovascular
MH  - Thorax/anatomy & histology/blood supply
EDAT- 2011/04/27 06:00
MHDA- 2012/09/13 06:00
CRDT- 2011/04/27 06:00
PHST- 2011/04/27 06:00 [entrez]
PHST- 2011/04/27 06:00 [pubmed]
PHST- 2012/09/13 06:00 [medline]
AID - 10.1109/TVCG.2011.80 [doi]
PST - ppublish
SO  - IEEE Trans Vis Comput Graph. 2012 Jun;18(6):966-77. doi: 10.1109/TVCG.2011.80.