---
title: "Reconstruct tags & optionally files of instance"
method: POST
path: "/instances/{id}/reconstruct"
tags: ["Instances"]
---

# Reconstruct tags & optionally files of instance

`POST /instances/{id}/reconstruct`

Reconstruct the main DICOM tags in DB of the instance whose Orthanc identifier is provided in the URL. This is useful if child studies/series/instances have inconsistent values for higher-level tags, in order to force Orthanc to use the value from the resource of interest. Beware that this is a time-consuming operation, as all the children DICOM instances will be parsed again, and the Orthanc index will be updated accordingly.

## Path parameters

- `id` string, required

## Request body

- object
  - `LimitToThisLevelMainDicomTags` boolean — Only reconstruct this level MainDicomTags by re-reading them from a random child instance of the resource. This option is much faster than a full reconstruct and is useful e.g. if you have modified the 'ExtraMainDicomTags' at the Study level to optimize the speed of some C-Find. 'false' by default. (New in Orthanc 1.12.4)
  - `ReconstructFiles` boolean — Also reconstruct the files of the resources (e.g: apply IngestTranscoding, StorageCompression). 'false' by default. (New in Orthanc 1.11.0)

## Response `200`

---

[API](https://skmtc.net/uclouvain/apis/orthanc-api.md) · [All operations](https://skmtc.net/uclouvain/apis/orthanc-api/llms.txt) · [OpenAPI document](https://skmtc-service-staging.skmtc.workers.dev/v1/apis/uclouvain/orthanc-api/versions/9297c4930d96/schema)