ELECTRONIC POSTER - ismrm

14:00 3577. Reconstruction of Line Tagged Cardiac Images by Compressed Sensing Algorithm
Using Contourlet Transform from Appropriate K-Space Sampling
Sung-Min Gho 1 , Narae Choi 1 , Dong-Hyun Kim 1,2
1 Electrical and Electronic Engineering, Yonsei University, Shinchon-Dong, Seoul, Korea, Republic of;
2 Radiology, Yonsei University, Shinchon-Dong, Seoul, Korea, Republic of
RF tagging in cardiac imaging can be used to analyze the heart wall motion. There is always a push towards higher spatial and/or
temporal resolution to enable more accurate quantification. This work is on combining line tagged cardiac imaging with the
compressed sensing (CS) algorithm and exploiting the distinct k-space feature of tagged images.
14:30 3578. Characterization of Vortex Flow in the Left Ventricle by Phase Contrast Magnetic
Resonance Imaging
Samuel Ting 1 , Paaladinesh Thavendiranathan 1 , Helene Houle 2 , Gianni Pedrizzetti 3 ,
Subha V. Raman 1 , Mani Vannan 1 , Orlando Simonetti 1
1 The Ohio State University, Columbus, OH, United States; 2 Siemens Medical Solutions, Mountain View, CA,
United States; 3 University of Trieste, Trieste, Italy
Characterization of vortex formation and flow within the heart may be used as tool for diagnosing and understanding
pathophysiological conditions of the heart. We present preliminary results demonstrating that phase contrast magnetic resonance
imaging may be used to quantitatively evaluate and characterize formation of vortices within blood flow in the left ventricle of the
heart.
15:00 3579. Quantitative Assessment of Atrioventricular Plane Displacement in Normals and
Diastolic Heart Failure-A Cine MRI Study.
Reena Anand 1 , Sohae Chung 1 , Sharath Bhagavatula, Leon Axel 1
1 Radiology, NYU Langone Medical Center, New York, NY, United States
In conventional cine MRI, it is observed that the atrioventricular (AV) plane of the heart descends towards the apex during systole and
moves back towards the atrium during the diastole. The displacement of the AV plane through the cardiac cycle is an expression of the
systolic and diastolic performance of the heart, so that it can be used to detect early diastolic dysfunction. In this study, we have
investigated the potential of MRI measurement of left AV plane displacement as a means to assess diastolic dysfunction.
Thursday 13:30-15:30 Computer 29
13:30 3580. Combination of Through-Plane Tissue Phase Mapping and SPAMM for 3D Cardiac
Motion Assessment
Anja Lutz 1 , Axel Bornstedt 1 , Robert Manzke 2 , Gerd Ulrich Nienhaus 3 , Volker Rasche 1
1 University Hospital of Ulm, Ulm, BW, Germany; 2 Philips Research Europe, Hamburg; 3 Institute of
Technology, University of Karlsruhe, Germany
Cardiac motion assessment can be performed by tagged imaging combined with HARP analysis and with tissue phase mapping
(TPM). The tagging approach enables fast assessment of the in-plane motion component, where TPM can be applied for full
assessment of the motion vector in 3D but requires at least fourfold measurement time. In this contribution tagging is combined with
TPM for 3D + time motion assessment. There is no information loss of the through plane motion, when tag lines are applied. The
combination can be used to reduce imaging time for motion encoding in 3D.
14:00 3581. MRI Compatible Treadmill
Eric L. Foster 1 , Mihaela Jekic 1,2 , Jacob A. Bender 1,2 , John W. Arnold 3 , Subha V.
Raman 1,4 , Orlando P. Simonetti 1,5
1 Dorothy M. Davis Heart and Lung Research Institute, The Ohio State University, Columbus, OH, United
States; 2 Biomedical Engineering, The Ohio State University; 3 Agricultural Technical Institute, The Ohio State
University; 4 Internal Medicine, The Ohio State University; 5 Internal Medicine and Radiology, The Ohio State
University
Treadmill exercise testing in conjunction with MRI may offer improved diagnosis of heart disease compared to current modalities;
however, traditional treadmills can not operate safely within the MR environment. An MR compatible treadmill was developed using
hydraulic drive and elevation systems and fiber-optic data transmission, allowing the treadmill to be positioned immediately adjacent
to the MR examination table. The treadmill successfully passed MR safety and compatibility tests. Six healthy volunteers were
exercised to peak cardiovascular stress and transferred to the MR table. Real time cine imaging was completed within 38±6.4 s,
meeting the AHA guideline of imaging within 60 s.