Asl.json file bids

1

Hello

I’m trying to get some ASL data into bids format. The validator suggests that information about the sequence can go in “/asl.json …” but if I create a bids/asl.json file with voxel size etc I get a NOT_INCLUDED error for the bids/asl.json file.

Am I missing something obvious?

Thanks

Michael

2

Hi @Michael_Firbank and welcome to neurostars!

You might find the BIDS starter kit and some example datasets good to look at.

Best,
Steven

3

Hi

Thanks, I have looked at those, however my concern is that the bids validator seems to inconsistently suggest that /asl.json is a place to put parameters, but also to complain that /asl.json is not a valid name for a file.

(in bids validator v1.14.6) as noted I get NOT_INCLUDED for
/asl.json

but I also get a warning PULSE_SEQUENCE_DETAILS_MISSING
and under reason it suggests "PulseSequenceDetails … can be included one of the following locations: /asl.json, …

Best wishes

Michael

4

I would put that info in your subject level ASL json, and otherwise it sounds like just a warning.

5

Hi Steven

Yes, it works if I put it in the subject level. I just don’t understand why the validator suggests that a global asl.json file is a possible place to put it, when that file is seemingly not allowed.

Thanks

Michael