ELECTRONIC POSTER - ismrm

14:30 3779. Balanced SSFP Spin-Labeled Angiography Using Sparse Data: Optimization and
Application to Supraaortic Vessels
Ioannis Koktzoglou 1 , Philip Hodnett, 1,2 , Erik Offerman 1 , Robert Edelman 1
1 Radiology, NorthShore University HealthSystem, Evanston, IL, United States; 2 Northwestern University,
Chicago, IL, United States
Arterial spin-labeled MRA using a balanced steady-state free precession is limited by flow artifacts in the setting of luminal
narrowing. In a stenotic flow phantom, we show that these artifacts can be minimized with the use of abbreviated echo trains made
possible with the use of parallel imaging acceleration and partial Fourier acquisition, and subsequently apply the technique in
volunteers and patients.
15:00 3780. Magnetic Resonance Imaging Measurements Predict Need for Intervention in
Patients Post Ross Procedure
Anna Lakoma 1 , James C. Carr 1
1 Department of Radiology, Northwestern University, Chicago, IL, United States
MRI derived pulmonary circulation parameters best predict need for future intervention in patients post Ross procedure.
Wednesday 13:30-15:30 Computer 42
13:30 3781. Accelerated Time Resolved Inflow with 3D Multi-Echo Radial Trajectories
Kevin M . Johnson 1 , Oliver Wieben 1,2 , Patrick Turski 2 , Charles Mistretta 1
1 Medical Physics, University of Wisconsin - Madison, Madison, WI, United States; 2 Radiology, University of
Wisconsin - Madison, Madison, WI, United States
Arterial spin labeling (ASL) sequences which utilize tagging schemes to images the flow of blood have emerged as effective
techniques for the non-contrast angiography; however, these techniques typically suffer from long acquisition times, sensitivity to tag
delay parameters, and uncertain performance in cases of complex flow . To mitigate these errors, we investigate the utilization of
highly accelerated, dynamic inflow imaging utilizing efficient, short TR 3D radial bSSFP sequences.
14:00 3782. Non-Contrast Enhanced Pulmonary Vein MRA with Compressed Sensing
Mehmet Akçakaya 1,2 , Peng Hu 2 , Vahid Tarokh 1 , Warren J. Manning 2 , Reza Nezafat 2
1 Harvard University, Cambridge, MA, United States; 2 Beth Israel Deaconess Medical Center, Harvard Medical
School, Boston, MA, United States
Non-contrast pulmonary vein (PV) MR angiography (MRA) is an alternative to the clinical contrast-enhanced technique. We have
recently developed a non-contrast PV MRA technique using a sagittal selective inversion pulse. However, the resulting acquisition
time is significantly longer than breath-hold contrast-enhanced technique. In this study, we investigate the feasibility of using
compressed sensing for accelerating data acquisition in non-contrast PV MRA. We use a distributed compressed sensing technique to
reconstruct separate coil images simultaneously. We show that this reconstruction yields good results even at high rates (x10).
14:30 3783. Non-Contrast Inversion Recovery Balanced Ssfp Mra of the Abdominal Aorta at
3T: Predicting Optimal Inversion Times by Blood Velocity Measurement
Iliyana Plamenova Atanasova 1,2 , Ruth P. Lim 1 , Hua Guo 1 , Daniel Kim 1 , Pippa Storey 1 ,
Kellyanne McGorty 1 , Andrew Laine 2 , Vivian S. Lee 1
1 Department of Radiology, New York University, New York, United States; 2 Columbia University, New York,
United States
3D non-enhanced balanced steady-state free precession MRA with a slab-selective inversion (IR SSFP) has demonstrated promise for
renal artery evaluation at 1.5T. With proper selection of inversion times (TI), the technique can be adopted for coronal imaging of the
abdominal aorta with comprehensive superior-inferior coverage at 3T. We propose a method for subject-specific calculation of TI
based on arterial blood velocities. Our results illustrate that visualization of the aortoiliac vessels using IR SSFP varies considerably
across subjects depending on flow velocities. Thus, measuring aortic velocities prior to MRA enables an examination tailored to the
patient’s physiology for improved arterial visualization.
15:00 3784. MRI Determined Carotid Artery Flow Velocities and Wall Shear Stress in a Mouse
Model of Vulnerable and Stable Atherosclerotic Plaque
Gustav Jacob Strijkers 1 , Glenda S. van Bochove 1 , Roel Straathof 1 , Rob Krams 2 , Klaas
Nicolay 1
1 Biomedical NMR, Department of Biomedical Engineering, Eindhoven University of Technology, Eindhoven,
Netherlands; 2 Department of Bioengineering, London Imperial College, London, United Kingdom
We report here on the pre-clinical MRI characterization of an apoE-/- mouse model of stable and vulnerable carotid artery
atherosclerotic plaques, which were induced by a tapered restriction (cast) around the artery. Specific focus was on the quantification
of flow velocities and wall shear stress (WSS), which are considered key players in the development of the plaque phenotype.