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4D Cardiovascular MRI with Variable-Density k-Space Scanning

发布日期:2013-03-10 16:18:53      浏览次数:

 

4D Cardiovascular MRI with Variable-Density k-Space Scanning

Time10:00 am, March. 22 (Friday)

Location: 104#, CBIR

Speaker: Dr. Jing Liu (Assistant Professor in the Department of Radiology and Biomedical Imaging at University of California San Francisco)

Abstract:

Magnetic resonance imaging (MRI) has become a major noninvasive imaging modality and allows broad applications. However, MRI is relatively slow compared to other imaging methods and often suffers from motion artifacts. Variable density k-space strategies using multiple-echo radial acquisition provide high data acquisition efficiency and motion robustness, which are highly favorable for dynamic imaging. Increased capabilities of MR for fast contrast-enhanced imaging, functional cardiac imaging and coronary imaging are demonstrated during breath-hold or free-breathing imaging. The frequently acquired k-space center with radial acquisition catches most of the image energy and then the motion information throughout the scan, which is exploited for self-cardiac and respiratory gating during free-breathing. Instead of acquiring a static coronary artery image with surrounding fat suppressed, the multi-echo acquisition allows water-fat separation, achieving simultaneous water and fat visualization of the coronaries through the cardiac cycle. 4D MRI will not only be important for evaluating cardiac function and coronary disease, but will be generalizable to conditions requiring similar capabilities. It will offer improved care for the vast population of patients with these conditions and financial benefits for the health care system.

Bio:

Since 2010 Dr. Jing Liu has been working as an Assistant Professor in the Department of Radiology and Biomedical Imaging at University of California San Francisco. Dr. Liu received her PhD in 2008 from University of Wisconsin-Madison, followed by a 2-year post-doctoral appointment at Cornell University (Weill Cornell Medical Center). Dr. Liu obtained her B.S. from University of Science and Technology of China in 2001 and completed her M.S. from McMaster University, Canada in 2003.

Dr. Liu has been focusing ondeveloping MRI data acquisition techniques and image reconstruction algorithms for cardiovascular MR imaging including contrast-enhance MRA, cardiac imaging and coronary imaging. Her research receives support from the National Institutes of Health (NIH) and the American Hear Association (AHA).