ADNI » Gradient http://adni.loni.ucla.edu Alzheimer’s Disease Neuroimaging Initiative Fri, 17 May 2013 17:06:36 +0000 en hourly 1 http://wordpress.org/?v=3.3.2 Incorrect GE Gradients used for Gradient Warping Correction http://adni.loni.ucla.edu/incorrect-ge-gradients-used-for-gradient-warping-correction/ http://adni.loni.ucla.edu/incorrect-ge-gradients-used-for-gradient-warping-correction/#comments Thu, 05 Jun 2008 19:52:52 +0000 cmena http://beta.adni.loni.ucla.edu/?p=36 Please discard any preprocessed GW data from the subjects and scan dates below that were downloaded from LONI before 06/01/2007.

Subject – Scan Date

  • 006_S_1130 – 11/30/2006
  • 098_S_0149 – 01/22/2006
  • 098_S_0149 – 08/12/2006
  • 098_S_0160 – 01/28/2006
  • 098_S_0160 – 09/02/2006
  • 098_S_0171 – 02/04/2006
  • 098_S_0171 – 07/30/2006
  • 098_S_0172 – 02/26/2006
  • 098_S_0172 – 10/21/2006
  • 098_S_0288 – 03/25/2006
  • 098_S_0542 – 05/21/2006
  • 098_S_0667 – 06/24/2006

The MRI Core found discrepancies in the ADNI phantom data analysis indicating the wrong gradient coefficient had been used to GW process these studies. The correct gradient was verified with the MRI sites, the data was reprocessed and re uploaded to LONI.

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