Difference between revisions of "2008 IGT Project Week Fast Imaging Library"

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Team: Scott Hoge, Bob Kraft
 
Team: Scott Hoge, Bob Kraft
  
Goals: Further develop tools to enable interactive EPI measurements for perfusion, fMRI, and temperature monitoring using accelerated and efficient EPI-based MR acquisitions
+
Goals: Further integrate algorithms from the Fast Imaging Library (doc here: http://www.spl.harvard.edu/publications/item/view/1393) to enable interactive EPI measurements for perfusion, fMRI, and temperature monitoring using accelerated and efficient EPI-based MR acquisitions
 +
 
  
 
Approach:
 
Approach:
* complete a mechanism to maintain the phase in our pMRI-UNFOLD-EPI acquisition technique, which is required for both temperature change estimation and EPI distortion correction
+
* complete a mechanism to maintain the phase in our pMRI-UNFOLD-EPI-PROPELLER acquisition technique, which is required for both temperature change estimation and EPI distortion correction
 
* incorporate real-time hooks into EPI sequence, to provide interactive acquisitions
 
* incorporate real-time hooks into EPI sequence, to provide interactive acquisitions
 
* start investigations into radial EPI
 
* start investigations into radial EPI
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Results (to be completed and presented at the end of the week):
 
Results (to be completed and presented at the end of the week):
 +
* extended accelerate short axis propeller epi to use partial Fourier
 +
** issues w/ recon pending due to susceptibility distortion from blade to blade
 +
* implemented both double-sampled and 'racetrack' trajectory in epi psd, to collect self-ref data for b0 field map estimation
 +
** able to calculate relative phase changes using racetrack reference data
 +
** may be incompatible with unfold nyquist ghost removal method
 +
* wfu epi psd updated to 3d
 +
* modified fgre to use modular rthawk implementation
 +
* rt epi not accomplished, due to difficulty getting rthawk to run on scanner
 +
 +
[[Image:igtweek08_fil_racetrack.png]]
 +
Fig 1 from Roopchansingh MRM 50:839, 2003
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 +
[[Image:igtweek08_grad_kx.png]]
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 +
 +
[[Image:igtweek08_grad_ky.png]]

Latest revision as of 15:30, 12 December 2008

Home < 2008 IGT Project Week Fast Imaging Library
Back to 2008_IGT_Project_Week#Projects

Team: Scott Hoge, Bob Kraft

Goals: Further integrate algorithms from the Fast Imaging Library (doc here: http://www.spl.harvard.edu/publications/item/view/1393) to enable interactive EPI measurements for perfusion, fMRI, and temperature monitoring using accelerated and efficient EPI-based MR acquisitions


Approach:

  • complete a mechanism to maintain the phase in our pMRI-UNFOLD-EPI-PROPELLER acquisition technique, which is required for both temperature change estimation and EPI distortion correction
  • incorporate real-time hooks into EPI sequence, to provide interactive acquisitions
  • start investigations into radial EPI

Other Notes:

Results (to be completed and presented at the end of the week):

  • extended accelerate short axis propeller epi to use partial Fourier
    • issues w/ recon pending due to susceptibility distortion from blade to blade
  • implemented both double-sampled and 'racetrack' trajectory in epi psd, to collect self-ref data for b0 field map estimation
    • able to calculate relative phase changes using racetrack reference data
    • may be incompatible with unfold nyquist ghost removal method
  • wfu epi psd updated to 3d
  • modified fgre to use modular rthawk implementation
  • rt epi not accomplished, due to difficulty getting rthawk to run on scanner

Igtweek08 fil racetrack.png Fig 1 from Roopchansingh MRM 50:839, 2003

Igtweek08 grad kx.png


Igtweek08 grad ky.png