TRADITIONAL POSTER - ismrm

Poster Sessions
2609. Clinical Application for Cirrhosis with Susceptibility Weighted Imaging
Yongming Dai 1 , Daoying Gen 2 , Wei Cheng 3 , E.M. Haacke 4
1 Siemens Ltd China, Healthcare, Magnetic Resonance Imaging, Shanghai, China; 2 Fudan University affiliated Huashan Hospital; 3 The
Third Military Medical University affiliated SouthWest hospital; 4 Wayne State University, United States
In this study we extended clinical application for hepatic disease (Cirrhosis)with susceptibility weighted imaging (SWI). The results showed promising
future for SWI application in human abdomen.
2610. A Software Phantom Generator System for Quality Control (QA) of MRI Iron Overload Assessment
Software
Bahman Kasmai 1 , Paul Napier Malcolm 1 , Andoni Paul Toms 1 , Andrew Brian Gill 2
1 Radiology, Norfolk & Norwich University Hospitals NHS Trust, Norwich, Norfolk, United Kingdom; 2 Radiology, Papworth Hospital
NHS Foundation Trust, Cambridge, Cambridgeshire
The aim of this work was to develop a software tool for validation, evaluation and integrity checks of in-house and commercial MRI iron overload systems.
A windows-based software application, called SOFGEN, written in C# and based on Microsoft .NET framework generates a sets of fully Dicom compliant
images from a set of user supplied parameters and decay model, for testing of Dicom compliant MRI T2(*) assessment software. The SOFGEN generated
phantoms were successfully used to evaluate a number of in-house developed T2(*) assessment software and is available free via email request to authors.
2611. Effects of Posprandial State and Mesenteric Blood Flow on the Repeatability of Magnetic Resonance
Elastography
Catherine D. G. Hines 1 , Mary J. Lindstrom 2 , Scott B. Reeder 1,3
1 Biomedical Engineering, University of Wisconsin-Madison, Madison, WI, United States; 2 Biostatistics and Medical Informatics,
University of Wisconsin-Madison, Madison, WI, United States; 3 Radiology, University of Wisconsin-Madison, Madison, WI, United
States
Blood flow and fasting status are recognized sources of variability in MRE measurements, and their impact on the repeatability of MRE is evaluated. MRE
stiffness values and flow through the superior mesenteric vein were measured in twelve healthy volunteers in fasted and fed states, and the sequences were
repeated five weeks later. No significant differences between fasted/fed state stiffness values and no correlation between values and measured flow are seen.
Overall, volunteers scanned in a known fasted or fed state provide very repeatable MRE stiffness values, where the standard deviation of one MRE exam is
8.5% or 9.0% for fasted and fed states, respectively.
2612. Three-Dimensional MRCP with Reduced RF Power Deposition
John P. Mugler, III 1 , Wilhelm Horger 2 , Berthold Kiefer 2
1 Radiology, University of Virginia, Charlottesville, VA, United States; 2 Siemens Healthcare, Erlangen, Germany
This work explored two approaches for reducing the RF power deposition of MRCP imaging based on a turbo-spin-echo pulse sequence. An adiabatic T2
preparation applied just before the excitation RF pulse, or a very long first echo spacing, combined with partial-Fourier acquisition permitted power
deposition to be reduced by 25%-40% compared to that for a standard MRCP pulse sequence, while providing image quality comparable to that for the
standard method. These methods will be valuable for addressing power-deposition limitations of MRCP at 3T, and will permit more consistent MRCP
image quality to be achieved.
2613. T2-Weighted Body Imaging with PROPELLER Using Parallel Imaging with Across Blade Calibration
James H. Holmes 1 , Philip J. Beatty 2 , Scott B. Reeder 3,4 , Zhiqiang Li 5 , Reed F. Busse 1 , Ajeetkumar
Gaddipati 6 , Jean H. Brittain 1
1 Applied Science Laboratory, GE Healthcare, Madison, WI, United States; 2 Applied Science Laboratory, GE Healthcare, Menlo Park,
CA; 3 Radiology, University of Wisconsin-Madison, Madison, WI, United States; 4 Medical Physics, University of Wisconsin-Madison,
Madison, WI, United States; 5 GE Healthcare, Phoenix, AZ; 6 GE Healthcare, Waukesha, WI, United States
This work demonstrates the application of a shared calibration scheme for autocalibrated parallel imaging to enable greater blade acceleration for abdominal
PROPELLER. The shared calibration method uses external calibration data as well as a small amount of internal calibration data per blade. The technique is
shown to improve robustness to motion for free-breathing T2-weighted abdominal body imaging. Results were found to compare favorably to respiratorygated
Cartesian exams suggesting that the PROPELLER approach may allow robust imaging in individuals where respiratory gating is not effective.
2614. Balanced MR Cholangiopancreatography with Motion-Sensitized Driven-Equilibrium (MSDE):
Feasibility and Optimization of Imaging Parameter
Tomohiro Nakayama 1 , Takashi Yoshiura 1 , Yukihisa Takayama 1 , Eiki Nagao 1 , Tsuyoshi Tajima 1 , Akihiro
Nishie 1 , Yoshiki Asayama 1 , Kousei Ishigami 1 , Daisuke Kakihara 1 , Daisuke Okamoto 1 , Hiroshi Honda 1 ,
Tomoyuki Okuaki 2
1 Clinical Radiology, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan; 2 Philips Electronics Japan
Motion-sensitized driven-equilibrium (MSDE) preparation was added to a balanced SSFP MRCP sequence in order to suppress disturbing high signal
intensities from flowing blood in vessels. We performed a volunteer study to determine optimal VENC value for the evaluation of biliary systems. We found
the optimum VENC values to be 3 or 5cm/s with best suppression of relative vessel signals to bile ducts. At a lower VENC value (1cm/s), signal of bile duct
was reduced likely due to minimal biliary flow. Higher VENC values (> 7cm/s) resulted in failure of vessel signal suppression.