Download presentation
Presentation is loading. Please wait.
Published byGrant Poole Modified over 9 years ago
1
# Department of Computer Science, University of Houston *Cardiovascular MRI Laboratory, The Methodist DeBakey Heart & Vascular Center Free-Breathing Cardiac MRI Ilyas Uyanik, Peggy Lindner, Dipan Shah (M.D.)*, Nicolaos Tsekos #, Karen Chin* Ioannis Pavlidis #
2
2/10 Motivation Cardiac MRI (Magnetic Resonance Imaging) –Evaluate the anatomy and function of the heart –Diagnose pathological cases (e.g., low ejection fraction and fibrillation) Existing methods -Breath-hold acquisition (does not allow for long duration acquisition) -Free-breathing acquisition with ECG and/or Peripheral Gating Goals –Free-breathing acquisition using MRI signal based Gating –Record long duration cardiac MRI without additional sensors Motivation Methods Results Conclusion
3
3/10 Methods Overview Motivation Methods Results Conclusion Phase 2 MRI Image ROI Level Set Left Ventricle 1D Signal Wavelet Energy Waveforms Extraction Phase 1 Indexing Reconstruction Phase 3 Methods Overview Indexing Visualization
4
4/10 Indexing Motivation Methods Results Conclusion Methods Overview Indexing Visualization Indexed MRI Threshold on breathing MRI
5
5/10 Visualization Motivation Methods Results Conclusion Methods Overview Indexing Visualization
6
6/10 Validation Ground Truth obtained by manually marking points on the left ventricle outer boundary Motivation Methods Results Conclusion Ground Truth Comparison –Extracted Signals
7
7/10 Surface Area Motivation Methods Results Conclusion Ground Truth Comparison –Extracted Signals
8
8/10 Cardiac Cycle Motivation Methods Results Conclusion Ground Truth Comparison –Extracted Signals
9
9/10 Breathing Cycle Motivation Methods Results Conclusion Ground Truth Comparison –Extracted Signals
10
10/10 - Free-breathing acquisition using MRI signal itself - Segmentation method is promising - Breathing and pulse signals extracted for indexing Future work - 3D Imaging modality -Experiments on normal/ abnormal pathological cases from volume over time Motivation Methods Results Conclusion
Similar presentations
© 2025 SlidePlayer.com. Inc.
All rights reserved.