Hi there,
without knowing much about this subject, I always liked "Functional MRI
of the human amygdala?" by Merboldt et al, NeuroImage 2001. Coronal
slice orientation and small voxel sizes were essentiell, if I remember
correctly.
Good luck,
Marko
Nicky Kochan wrote:
> Dear SPMers
> We would like to minimise the signal loss due to field inhomogeneities in
> the inferior temporal region but do not want to compromise signal in the
> rest of the brain. Pilot testing of our visual working memory task has
> produced activation in frontal, parietal and occipital regions, but not in
> the hippocampal regions, as expected.
>
> We are using a Phillips 3T system; the slice tilt is aligned to the AC-PC,
> FOV: 240mm,Matrix: 112x128x80,Flip angle: 90. TE 30ms, TR 2020ms.Phase
> encode gradient is posterior.
>
> Are there any ideas on how to improve signal in the inferior temporal
> lobes? I have read Weiskop et al NeuroImage 33 which suggests EPI
> parameters to maximise signal in specific regions eg hippocampus, but this
> seems to be at the expense of reduced/distorted signal in other brain
> areas. Also control of z shimming gradient is not possible on our system.
>
> Nicky Kochan
> Neuropsychiatric Institute, University of NSW, Australia
>
>
--
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Marko Wilke (Dr.med./M.D.)
[log in to unmask]
Universitäts-Kinderklinik University Children's Hospital
Abt. III (Neuropädiatrie) Dept. III (Pediatric neurology)
Hoppe-Seyler-Str. 1, D - 72076 Tübingen
Tel.: (+49) 07071 29-83416 Fax: (+49) 07071 29-5473
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