In comparing the example given for 'images_crosswalk.tsv' and the 'images_crosswalk_pilot.tsv' they seem to have a different format. Which one is correct?
In synapse.org, an example for 'images_crosswalk.tsv' is given as:
```
subjectId examIndex imageIndex view laterality filename
kz2iyqxi 1 1 CC R u10rwx9j.dcm
kz2iyqxi 1 2 CC L dnbjt46u.dcm
kz2iyqxi 1 3 MLO L a8pwx0hi.dcm
kz2iyqxi 1 4 MLO R x5hdzxhx.dcm
```
where as if you open 'images_crosswalk_pilot.tsv' it looks like this:
```
patientId examIndex imageView imageIndex filename md5
20 1 R 1 000135.dcm.gz a99a1f96787bd3440bdc669af95c3fc5
20 1 L 2 000136.dcm.gz 6b9f44b24158912fe926aa374bb401b6
20 1 L 3 000137.dcm.gz dde0d4a73246789c88a7cecf81ddaae3
20 1 R 4 000138.dcm.gz 9cfc47238911f0738d74cda7eb28aa16
98 1 R 1 100151.dcm.gz 09bd87b383bf99a252869a514435425d
98 1 L 2 100152.dcm.gz 603472f63c7a6ab5806ce30d59a3d300
```
Which one can we expect to have in /metadata/ during the challenge?
Same question for 'exams_metadata.tsv', slight differences can be seen against the pilot .tsv file
Created by Jose Costa Pereira josecp You are correct, the format of the files [exams_metadata_pilot](https://www.synapse.org/#!Synapse:syn7214000) and [images_crosswalk_pilot](https://www.synapse.org/#!Synapse:syn7214001) area slightly different from the latest format defined by the [Challenge Dictionary](https://www.synapse.org/#!Synapse:syn4224222/files/). For example, the column _cancer_ in the images crosswalk file has been removed from the final Challenge format, however I still find it convenient in the Pilot Set as it allows to visualize the 500 images and quickly see if an image is part of a cancer positive exam, i.e. that a given image features or not a breast that has developed cancer within 12 months.
We will add a [note on the wiki page of the Pilot Set](https://www.synapse.org/#!Synapse:syn6174174) regarding the changes between the format of the Pilot Set and the latest format of the Challenge.
Thanks! hi Thomas, thanks for clarifying this issue.
I'm pretty sure I got both .tsv from the synapse DREAM challenge project, but can't remember exactly where from. If I find an outdated version of the .tsv, I'll let you know! Hi Jose,
The reference for the content of the exams metadata and images crosswalk file is the [Challenge Dictionary](https://www.synapse.org/#!Synapse:syn4224222/files/). Can you please give me the address to the page that contains the two table examples that you are referring to? The illustrations on the wiki page [Submitting Models](https://www.synapse.org/#!Synapse:syn4224222/wiki/401759) are up to date.
Thanks!