IT category localizer parameters

Scanned 2013 or later

Scan

Coil: LifeServices (16 channel receive, 4 channel transmit)

seqfil: epi_riken_ptx

petable: epi76lin4k

Matrix size: 64×64

FOV 19.2 x 19.2 cm2

Slice thickness: 3 mm, no gap

Voxel size 3 x 3 x 3 mm3

Number of slices: 27

Slice interleaving: yes

Slice orientation: aligned with the inferior surface of the occipital and temporal lobes

Volume TR (full k-space): 4.309 s

Segments (=shots): 4

Ilts: 1

TSENSE Acceleration: 4

Volume TR after TSENSE: 1.077 s

TE: 0.025 s

Flip angle: 63.5 deg

Volumes per run (full k-space): 150

Volumes per run after TSENSE processing: 600

Run duration: 10 min 46 s

Runs per scan: 6 (5 for subject s001)

Stimulus

phase scrambled gray scale images

power spectra equated across images and categories

image size: 14 x 14 deg2

central fixation cross (black)

image display time: 0.75 s

gap between images: 0.25 s

one-back task (10% of trials)

block design

block duration: 12.9 s (corresponds to 12 accelerated volumes)

number of blocks per run:

  • gray (with fixation): 10
  • human faces (variable expressions and view angles): 8
  • buildings: 8
  • human bodies (without head): 8
  • cars: 2
  • flowers: 2
  • fruit and vegetables: 2
  • musical instruments: 2
  • scrambled: 8
  • total: 50

(bodies, cars, flowers and fruit-veg can be pooled to “objects”)

First and last block always gray, otherwise fully randomized

Images within blocks fully randomized

Original images were obtained from Seiichirou Yokoo, except for bodies, which are from http://pages.bangor.ac.uk/~pss811/page7/page7.html

Scanned 2012 (s005)

As 2013 and beyond, except

Coil: Nova half helmet (8 chan) + 2 + 2 anterior temporal channels

Seqfil: epi_riken_V3

Number of slices: 21

Volume TR (full k-space): 4.284 s

Volume TR after TSENSE: 1.071 s

Number of runs: 7

Volumes per run (full k-space): 126

Volumes per run after TSENSE processing: 504

Run duration: 9 min

Runs per scan: 7

Category “human bodies” was not included; therefore, total number of blocks per run: 42

Scanned 2011 (s019 and s023)

As 2013 and beyond, except

Coil: Nova visual (4 chan) + 2 + 2 anterior temporal channels

seqfil: epi_riken_V3

Number of slices: 21

Volume TR (full k-space): 4.284 s

Segments (=shots): 4

Ilts: 2

TSENSE Acceleration: 2

Volume TR after TSENSE: 2.142 s

TE: 0.025 s

Flip angle: 47 deg

Volumes per run (full k-space): 57

Volumes per run after TSENSE processing: 114

Run duration: 4 min 21 s

Runs per scan: s019: 10+9 (on two separate days); s023 10+8

number of blocks per run:

  • gray (with fixation): 3
  • human faces (variable expressions and view angles): 4
  • buildings: 4
  • cars: 1
  • flowers: 1
  • fruit and vegetables: 1
  • musical instruments: 1
  • scrambled: 4
  • total: 19

Last block always gray, otherwise fully randomized