How to curate PCASL in BIDS

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1

Hi experts,

I want to have some PCASL data in BIDS and I am getting the following errors with the BIDS validator. I have edited JSON sidecars for necessary fields and aslcontext.tsv file seems okay too. These data were from Siemens Prisma scanner. Could anyone please advise me on this?

File Path: Files with such naming scheme are not part of BIDS specification. This error is most commonly caused by typos in file names that make them not BIDS compatible. Please consult the specification and make sure your files are named correctly. If this is not a file naming issue (for example when including files not yet covered by the BIDS specification) you should include a ".bidsignore" file in your dataset (see https://github.com/bids-standard/bids-validator#bidsignore for details). Please note that derived (processed) data should be placed in /derivatives folder and source data (such as DICOMS or behavioural logs in proprietary formats) should be placed in the /sourcedata folder.

	Type:		Error
	File:		sub-2010_ses-01B_pcasl.json
	Location:		BIDS_dataset/sub-2010/ses-01B/perf/sub-2010_ses-01B_pcasl.json
	Reason:		Files with such naming scheme are not part of BIDS specification. This error is most commonly caused by typos in file names that make them not BIDS compatible. Please consult the specification and make sure your files are named correctly. If this is not a file naming issue (for example when including files not yet covered by the BIDS specification) you should include a ".bidsignore" file in your dataset (see https://github.com/bids-standard/bids-validator#bidsignore for details). Please note that derived (processed) data should be placed in /derivatives folder and source data (such as DICOMS or behavioural logs in proprietary formats) should be placed in the /sourcedata folder.
	Evidence:	sub-2010_ses-01B_pcasl.json

	Type:		Error
	File:		sub-2010_ses-01B_pcasl.nii.gz
	Location:		BIDS_dataset/sub-2010/ses-01B/perf/sub-2010_ses-01B_pcasl.nii.gz
	Reason:		Files with such naming scheme are not part of BIDS specification. This error is most commonly caused by typos in file names that make them not BIDS compatible. Please consult the specification and make sure your files are named correctly. If this is not a file naming issue (for example when including files not yet covered by the BIDS specification) you should include a ".bidsignore" file in your dataset (see https://github.com/bids-standard/bids-validator#bidsignore for details). Please note that derived (processed) data should be placed in /derivatives folder and source data (such as DICOMS or behavioural logs in proprietary formats) should be placed in the /sourcedata folder.
	Evidence:	sub-2010_ses-01B_pcasl.nii.gz

Thank you.

Best regards,
Ru

2

Hi @Pradeepa_Ruwan,

Please refer to the naming conventions described here.

In particular for your case, the suffix of your files should be asl not pcasl.

Best,
Steven

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