Question about Folder Indexer plugin

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1

Hello,

I have a few question about the Folder Indexer plugin:

  1. Are the files in the specified folders “imported” ie is info about the instance dicom tags added to the main Orthanc postgresql database?

  2. Is the tags are indeed added to the main Orthanc postgresql database what happens when a folder is removed from indexing ?

  3. Will the studies appear to the user just like the studies in Orthanc? Are there any limitations?

  4. I read somewhere in the group that SQLlite is used in some way…what is it used for? Is it still used if Im using the Postgresql backend?

2

Hello,

  1. Are the files in the specified folders “imported” ie is info about the instance dicom tags added to the main Orthanc postgresql database?

Yes, the main DICOM tags are imported into the Orthanc index. But the DICOM files are not copied to the Orthanc storage area.

  1. Is the tags are indeed added to the main Orthanc postgresql database what happens when a folder is removed from indexing ?

Yes, the folder indexer plugin continuously monitors the folders that it indexes. When the folder indexer plugin detects some deletion (including folders), it automatically removes the DICOM instance from the Orthanc index.

  1. Will the studies appear to the user just like the studies in Orthanc? Are there any limitations?

Yes, it appears just like other DICOM studies.

  1. I read somewhere in the group that SQLlite is used in some way…what is it used for? Is it still used if Im using the Postgresql backend?

The side SQLite database is used to map the path of the DICOM file to the corresponding Orthanc identifier, and vice-versa. This information is precisely needed to identify which files are removed.

Sébastien-