Example dataset

We will be using the Duncan et al data from the OpenFmri project.

This is dataset ds107.

We’ll start by looking at the first 15 subjects.

We have copies of subject 1’s first functional and structural image in the course web directory

Description of data

Article describing dataset and analysis:

http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2686646/

From the methods section of that article, we find these bits of information:

• Siemens 1.5 T MR scanner

• EPI (functional images)

  • TR = 3000 ms
  • TE = 50 ms
  • FOV = 192 × 192
  • matrix = 64 × 64
  • “notional resolution” 3 × 3 × 3 mm
  • 164 volumes per run

• T1 FLASH (anatomical images)

  • TR = 12 ms
  • TE = 5.6 ms
  • 1 mm3 resolution

Missing information

At least - I couldn’t find this information at a quick scan - please correct me if I’m wrong:

• Slice order (interleaved? sequential?)
• Volume gap in time (any gap between the last slice from volume N and the first slice of volume N+1?)
• Slice width (was there a gap between the slices)