chunk entity not covered by validator?

[jcohenadad]

Hello! I have a dataset that contains the chunk entity, which is valid in v1.8.0 (see here). However, I am getting a bids-validator error: test_bids_errors.txt

Dummy dataset for testing: test_bids.zip

Is it because the BIDS validator is not (yet) covering this entity? Or did I do something stupid with my naming?

Thanks!

[Remi-Gau]

It is just not an anat entity:

https://bids-specification.readthedocs.io/en/stable/04-modality-specific-files/01-magnetic-resonance-imaging-data.html#anatomy-imaging-data

[jcohenadad]

Thank you for the insights @Remi-Gau !

How do people refer to various FOV chunks, which is pretty common in MRI

[Remi-Gau]

The acquisition label ?
Really not sure. But this would be my first response from the top of my head.

[jcohenadad]

Hum, that’s too bad because the definition of chunk is much closer to that of acq for describing different FOVs acquired on the same subject in the same imaging session:

Definition: The chunk- key/value pair is used to distinguish between different regions, 2D images or 3D volumes files, of the same physical sample with different fields of view acquired in the same imaging experiment.

Maybe there is already a BEP that plans to make a wiser use of chunk? @mariehbourget @SylvainTakerkart do you know by any chance?

[Remi-Gau]

In theory we could add an entity from one datatype to an another existing datatype without needing a whole bep. Maybe open an issue in the specification describing your use case and motivations. Sent from Outlook for Android<https://aka.ms/AAb9ysg>

…

________________________________ From: Julien Cohen-Adad ***@***.***> Sent: Thursday, January 12, 2023 11:01:15 PM To: bids-standard/bids-validator ***@***.***> Cc: Remi Gau ***@***.***>; Mention ***@***.***> Subject: Re: [bids-standard/bids-validator] `chunk` entity not covered by validator? (Issue #1582) Hum, that’s too bad because the definition of chunk is much closer to that of acq for describing different FOVs acquired on the same subject in the same imaging session: Definition: The chunk- key/value pair is used to distinguish between different regions, 2D images or 3D volumes files, of the same physical sample with different fields of view acquired in the same imaging experiment. Maybe there is already a BEP that plans to make a wiser use of chunk? @mariehbourget<https://github.com/mariehbourget> @SylvainTakerkart<https://github.com/SylvainTakerkart> do you know by any chance? — Reply to this email directly, view it on GitHub<https://github.com/bids-standard/bids-validator/issues/1582#issuecomment-1381041469>, or unsubscribe<https://github.com/notifications/unsubscribe-auth/ABVDQIN64LMFTYGM6G3Z7DDWSB5KXANCNFSM6AAAAAATYWUQRE>. You are receiving this because you were mentioned.Message ID: ***@***.***>

[jcohenadad]

In theory we could add an entity from one datatype to an another existing datatype without needing a whole bep. Maybe open an issue in the specification describing your use case and motivations.

👍 bids-standard/bids-specification#1382

[SylvainTakerkart]

this would make sense to me, this indeed would be consistent with the BIDS microscopy chunking...