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biac:analysis:topup_correction [2019/02/22 14:03] cmp12biac:analysis:topup_correction [2019/02/22 14:51] cmp12
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 there are 2 scenarios that typically apply here there are 2 scenarios that typically apply here
-1) a short acquisition with RPE B0s +1) DWI and a short acquisition with RPE B0s 
-2) an entire acquisition with the same gradient table and reverse phase encoding +2) entire acquisitions with the same gradient table and reverse phase encoding 
  
 In both scenarios it is important to create your data with normal phase encoding direction first, followed by reversed. In both scenarios it is important to create your data with normal phase encoding direction first, followed by reversed.
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 ==== Prepare your input datasets ==== ==== Prepare your input datasets ====
 +
 +Specify that a set of images (typically b=0 volumes) will be provided for use in inhomogeneity field estimation only
  
 For scenario 1, create your blip up / blip down B0 data the same way as above. For scenario 1, create your blip up / blip down B0 data the same way as above.
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 dwipreproc dwi.mif dwi_corr.mif -rpe_all -pe_dir AP -readout_time 0.10656 -debug dwipreproc dwi.mif dwi_corr.mif -rpe_all -pe_dir AP -readout_time 0.10656 -debug
  
--rpe_all signals that you've replicated ALL the directions with a rpe acquisition+-rpe_all signals that you've replicated 
 +LL the directions with a rpe acquisition
 -pe_dir is the phase encode direction of your regular acquisition -pe_dir is the phase encode direction of your regular acquisition
 -readout_time from above   -readout_time from above  
 </code> </code>
  
 +
 +{{ :biac:analysis:trace_raw_corr.png?800 |}}
  
biac/analysis/topup_correction.txt · Last modified: 2024/06/21 15:44 by 127.0.0.1