[BitBucket user: Sébastien Jodogne]
[BitBucket date: 2017-07-05.10:51:29]

Here is how to reproduce the issue:

```
$ sudo docker run -p 4242:4242 -p 8042:8042 --rm jodogne/orthanc:1.2.0
$ python ~/Subversion/orthanc/Resources/Samples/ImportDicomFiles/ImportDicomFiles.py localhost 8042 ./test_720.dcm orthanc orthanc
$ curl -v -u orthanc:orthanc http://localhost:8042/patients/da128605-e040d0c4-310615d2-3475da63-df2d1ef4/modify -X POST -d '{"Replace":{"PatientID":"Hello","PatientName":"Sample patient name"}}'
```

The bug is inside DCMTK 3.6.0, and does not show up if using DCMTK 3.6.1 snapshots. The solution consists in setting `-DUSE_DCMTK_361=ON` when invoking CMake.