ISMRM SCIENTIFIC
WORKSHOP ~ 3-6 February 2013
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Data Sampling & Image Reconstruction
Sedona, AZ, USA |
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RECON
CHALLENGE |
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Registrants are invited
to submit reconstructed images in one or more of the following three
challenges. Data can be collected on any MR scanner using any
hardware with any reconstruction. The images will be judged by
clinical radiologists and cardiologists for diagnostic relevance,
and the discussion of the images on Monday evening will be followed
by a presentation of the respective Challenge winners.
The deadline for submission is: 03 January 2013
1. Real-time Cardiac Challenge: The challenge is to provide
the "best" real-time movies (2D plane over time) of the heart:
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Two data sets must
be presented: (1) the cardiac short-axis and (2) 4-chamber view;
the 4-chamber view needs to include the mitral and tricuspid
valves (see
http://www.scmr.org/assets/files/members/documents/Cardiac_views.pdf
for an example);
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Each plane must be
scanned in real-time for at least 10 seconds, showing at least 2
breathing cycles (no gating!);
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We encourage
submission of datasets that clearly illustrates the benefits of
the real-time acquisitions, e.g. heavy breathing and
arrhythmias;
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Data such as B1 & B0
maps, eddy current measurements may be done ahead of time;
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Information on recon
algorithm, recon time (and platform), field strength and coils
required;
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Entrants must supply
additional data (such as a breath hold cine) to illustrate the
temporal and spatial resolution of their entry; and
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Recon does not have
to be real-time, but information on recon time (e.g. lag time if
real-time) should be included.
2. T2 Brain Challenge
(2D Multislice):
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Image must be in
brain, having good T2 weighted contrast between gray and white
matter;
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The total scan time must be less than or equal to 60 seconds;
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The images should be in the Axial orientation, 2 mm thick
(contiguous);
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The images must support a minimum FOV of 220mm Anterior/Posterior,
180mm Left/Right, 160mm head/foot (in the slice direction, i.e. 80
slices);
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Collect the best in-plane resolution you can achieve with adequate SNR and minimal artifacts; and
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B0 and B1 maps, eddy current measurements, etc., can be acquired
ahead of time (but used only for corrections, not as part of the
final actual data). These must be declared.
3. T1 Brain Challenge (3D isotropic resolution):
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Images must be of
the brain, with good T1 weighted contrast between gray and white
matter;
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The total scan time must be less than or equal to 30 seconds;
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The scan should be collected as a 3D scan with isotropic
resolution. Obtain the best resolution possible with adequate SNR
and minimal artifacts;
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Reconstruct data with 0.6mm isotropic resolution (via zero-padding
or interpolation);
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The imaging volume must support a minimum FOV of 220mm
Anterior/Posterior, 180mm Left/Right, 160mm head/foot; and
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B0 and B1
maps, eddy current measurements, etc., can be acquired
ahead of time (but used only for corrections, not as part of the
final actual data). These must be declared.
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FOR ALL CHALLENGES:
- You must be registered for the meeting to be considered as a
finalist;
- Images must be in standard DICOM format;
- Images must be given for three normal volunteers using the exact
same parameters for acquisition and reconstruction (other than e.g.
plane orientation - the point here is that you may not optimize
parameters between subjects);
- Images must be anonymized; and
- Users must submit basic information on acquisition and
reconstruction methods, e.g.:
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These images
were collected on a 4T MRI scanner using an 17-channel head
coil. Data were collected at 0.9mm resolution, the specified FOV, TR/TE 18/2 msec, flip angle 9 degrees, with a jazzy
spiral sequence and undersampled by a factor of 17 in the radial
direction. Acquisition was 29 seconds, and the reconstruction, using
my new vice-grip algorithm for compressed sensing, took 4 hours on a
HP Z280 with 16 CPU�s. B0 maps were acquired separately. |
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- For
challenge 1 (Cardiac), there are 12 dicom series, eg:
- 01 volunteer 1, short axis, breathold cine (for
comparison)
- 02 volunteer 1, short axis, realtime cine (for
judging)
- 03 volunteer 1, 4-chamber view, breathold cine (for
comparison)
- 04 volunteer 1, 4-chamber view, realtime cine (for
judging)
- 05 volunteer 1, short axis, breathold cine (for
comparison)
- 06 volunteer 2, short axis, realtime cine (for
judging)
- 07 volunteer 2, 4-chamber view, breathold cine (for
comparison)
- 08 volunteer 2, 4-chamber view, realtime cine (for
judging)
- 09 volunteer 3, short axis, breathold cine (for
comparison)
- 10 volunteer 3, short axis, realtime cine (for
judging)
- 11 volunteer 3, 4-chamber view, breathold cine (for
comparison)
- 12 volunteer 3, 4-chamber view, realtime cine (for
judging)
- Each
cardiac series will be a single 2D plane shown over time
- For
challenge 2 (Brain T2) there are 3 series entered (one
per volunteer)
- Each series should be axial (or oblique axial), with
80 slices (2mm contiguous covering 160 mm)
- For
challenge 3 (Brain T1) there are 3 series entered (one
per volunteer)
- Each series should be reconstructed at 0.6mm isotropic
resolution, covering a minimum FOV of 220mm (AP) x 180mm
(LR) x 160 mm (SI).
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- For each challenge, the entries of all finalists will be shown,
anonymously, at the meeting;
- Finalists will be notified of this before the meeting, and should
be ready, if they win, to present their work in a 2 minute, 2 slide
presentations;
- Deadline for entries is Jan
3, 2013;
- Entries submitted before Dec. 7, 2012, will be inspected, and may
be re-submitted if they fail to meet any of the criterion.
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Recon Challenge
Online Submission Form |
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The International Society for Magnetic Resonance in Medicine is accredited by
the Accreditation Council for Continuing Medical Education to
provide continuing medical education for physicians. |