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Events - MR Physics and Pulse Sequence Discussion Group
| Host: | Michael H. Buonocore, Professor of Radiology, Technical Director of the Imaging Research Center |
|---|---|
| Location: | Conference Room, UC Davis Imaging Research Center |
| Purpose: | The group meeting is intended for faculty, post-docs, and graduate students who have an interest in knowing more about MR physics, and learning the details of MR pulse sequences and pulse sequence design on both Siemens and GE MRI systems. |
Previous meetings...
Youngkyoo Jung, PhD, will discuss "3D Diffusion Tensor MRI with Isotropic Resolution Using a Steady-State
Radial Acquisition"
Presentations to be given at International Society for Magnetic
Resonance in Medicine (ISMRM) Meeting. ISMRM meeting is being held in
Berlin, May 19-25, 2007.
- Taka Natsuaki will present Three-Dimensional Overlapping “Rod” acquisition (TORQ): a Novel K-Space Trajectory for 3D Extension of PROPELLER
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Dr. Buonocore will present background material and recent results on
in-vivo MR spectroscopy of coupled spin systems such as Lactate and GABA.
The results are being presented in two electronic poster sessions and one
traditional poster session at the ISMRM meeting:
- A Four-Pulse PRESS Sequence for Correction of the Chemical Shift Misregistration Signal Loss in Lactate Spectroscopy.By Sison, Buonocore, Maddock.
- A New Spectral Editing MRS Sequence for Lactate and GABA Using a Unique Basing Pulse Combination for Coupled-Spin Inversion at long TE. By Buonocore, Sison, Maddock.
- Extension of 8 Step Phase Cycling Scheme for improved lipid suppression using four-pulse PRESS MRS Sequences. By Sison, Buonocore, Maddock.
Discussion Leader: Taka Natsuaki, BME Graduate Student
Title: Progress Report on Siemens Implementation of Three-dimensional
Overlapping 'Rod' Acquisition (TORQ)
The 3D MRI data acquisition methods have the advantage over their 2D
counterparts in minimum slice thickness and in Signal to Noise Ratio.
However, prolonged acquisition time and resulting motion artifacts
hinder the applicability. To solve these 3D MRI limitations, I would
like to propose a novel 3D acquisition method called TORQ method. TORQ,
which stands for "Three-dimensional Overlapped "Rod" acquisition", is
based on a non-Cartesian k-space trajectory with "rod" element rotates
about its core in 3D. In this presentation, first I will briefly
describe the theory behind the TORQ method. Then I will describe the
technical specifics of implementations in Siemens IDEA environment.
Discussion Leader: Shunshan Li
Post-doctoral scholar Shunshan Li will talk about his successes with implementing EPI ghost correction on the Siemens 3.0T TRIO VA25A MRI system. Ghost correction algorithms originally developed for the GE 1.5T MRI systems have been incorporated into the Image Calculation Environment (ICE) of the Siemens 3.0T system, and have consistently improved the quality of the EPI images.
This implementation is a significant advance because it provides an improvement to Siemens base EPI sequence.
Discussion Leader: Shiloh Sison
Research Associate and graduate student Shiloh Sison will lead
discussion on pulse sequence development using the Siemens IDEA
programming environment. She will describe the challenges of coding new
sequences for MR spectroscopy and fMRI, in particular implementation of
changing gradient moments, adding custom RF and gradient pulses, and
providing user-controllable timings.
Discussion Leaders: Michael H. Buonocore, Jake Willig-Onwuachi
Several of the regular members of this discussion group attended the ISMRM meeting in Seattle last week.
So, in this group meeting five or six of those attendees will present 10 minute talks on a topic or paper from the meeting
that interested and or intrigued them.
These talks may cover a relatively broad area of MR that was covered in the meeting,
or they may be focused on one particular paper or session.
At the group meeting, the final presenter list will be set, and presentation order will be determined by a random draw.
The presenters are:
- Taka Natsuaki (BME PhD Candidate)
- Bo Peng (BME PhD Candidate)
- Youngseob Seo (BME PhD Candidate)
- Shiloh Sison (BME Master's Candidate)
- Michael H. Buonocore (Radiology faculty member)
- Jake Willig-Onwuachi (Radiology/BME faculty member)
Discussion Leader: Shunshan Li, PhD
Shunshan's particular research focuses on high-resolution echo-planar imaging (EPI) image reconstruction and EPI ghost correction,
principally for the Siemens MRI system.
These topics will be discussed in this meeting.
Discussion Leader: Shunshan Li, PhD
Shunshan is a post-doctoral scholar in the Imaging Research Center.
He has experience with reading Siemens MRI raw data files and in programming within the Siemens MR image calculation environment (ICE).
Shunshan will share his knowledge about these topics in this meeting.
His particular research focuses on high-resolution echo-planar imaging (EPI) image reconstruction and EPI ghost correction,
principally for the Siemens MRI system.
These topics will be discussed briefly in this meeting and in more depth next meeting.
Discussion Leader: Shiloh Sison
Shiloh Sison is a Staff Research Associate in the Imaging Research Center and Graduate Student in the Biomedical Engineering Department.
Shiloh will discuss the theory and implementation of MR spectral editing sequences, applicable to both GE and Siemens MR systems. Shiloh has made rapid progress in implementing and testing a sequence for spectral editing of lactate on the Siemens 3T system.
Discussion Leader: Michael H. Buonocore, MD-PhD
Dr. Buonocore reviewed MR physics and pulse sequence research and
development, and described topics which are candidate topics and
speakers for more detailed discussion in future meetings.
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