Question
Question Posted 05/16/16:
Dear Sir or Madam,
Our lab is using ADNI data to do analysis right now. I just find that the data format is quite different for some subjects. For example, 012_S_4128 has 6720 slices for resting state fMRI, but 012_S_4545 only has a 4D image for extended resting state fMRI. For those subjects with 4D DCM data, there are some problems when coregistering functional data to their own structure data. When I check the functional image, the voxel size is 4*4*4 for 012_S_4128, but 1*1*3.31 for 012_S_4545. I think that's why it can not be coregistered to structure image correctly. Could you help me to figure it out?
Thanks a lot. Look forward to your reply.
Best
Ping Ren
Dear Sir or Madam,
Our lab is using ADNI data to do analysis right now. I just find that the data format is quite different for some subjects. For example, 012_S_4128 has 6720 slices for resting state fMRI, but 012_S_4545 only has a 4D image for extended resting state fMRI. For those subjects with 4D DCM data, there are some problems when coregistering functional data to their own structure data. When I check the functional image, the voxel size is 4*4*4 for 012_S_4128, but 1*1*3.31 for 012_S_4545. I think that's why it can not be coregistered to structure image correctly. Could you help me to figure it out?
Thanks a lot. Look forward to your reply.
Best
Ping Ren
Response posted 05/25/16 by ADNI MRI Core:
Thank you for your question to the ADNI MRI Core:
ADNI does not upload NIfTI formatted fMRI data.
1. If a user downloads fMRI data in NIfTI format, LONI can assist with the conversion of that data (dba@loni.usc.edu)
2. If there is data which does not have a DICOM version then it should not exist or is incorrectly being classified as fMRI — there have been issues in the past where ASL data was presented as fMRI but those had all been cleared up.
ADNI MRI Core
ADNI does not upload NIfTI formatted fMRI data.
1. If a user downloads fMRI data in NIfTI format, LONI can assist with the conversion of that data (dba@loni.usc.edu)
2. If there is data which does not have a DICOM version then it should not exist or is incorrectly being classified as fMRI — there have been issues in the past where ASL data was presented as fMRI but those had all been cleared up.
ADNI MRI Core
