--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Sphinx/source/faq/dcmtk-tricks.rst	Thu Mar 12 09:34:20 2020 +0100
@@ -0,0 +1,61 @@
+.. _dcmtk-tricks:
+
+Some tricks with DCMTK
+======================
+
+.. contents::
+   :depth: 3
+
+Sending uncommon or recent SOP class UIDs
+-----------------------------------------
+
+On many systems, the ``storescu`` command from the `DCMTK project
+<https://support.dcmtk.org/docs/storescu.html>`__ is not configured
+out-of-the-box to send uncommon/recent SOP class UIDs or transfer
+syntaxes. You might have to fine-tune the default configuration file
+of ``storescu`` in order to be able to send e.g. MPEG4 videos or
+breast tomosynthesis images.
+
+.. highlight:: text
+               
+For instance, here is the result of sending one MPEG4 video on a
+Ubuntu 18.04 box::
+
+  $ storescu localhost 4242 XC000000.dcm 
+  E: No presentation context for: (VVp) 1.2.840.10008.5.1.4.1.1.77.1.4.1
+  E: Store SCU Failed: 0006:0208 DIMSE No valid Presentation Context ID
+
+This error message is unrelated to Orthanc (especially if you have set
+the :ref:`configuration option <configuration>`
+``UnknownSopClassAccepted`` to ``true``). To properly adapt the
+configuration file, first determine the DICOM tag ``SOPClassUID`` ()
+and the transfer syntax of the file, which can be done by using the
+``dcm2xml`` command-line tool::
+
+  $ dcm2xml XC000000.dcm | grep -E 'data-set xfer|"SOPClassUID"'
+  <data-set xfer="1.2.840.10008.1.2.4.102" name="MPEG-4 AVC/H.264 High Profile / Level 4.1">
+  <element tag="0008,0016" vr="UI" vm="1" len="32" name="SOPClassUID">1.2.840.10008.5.1.4.1.1.77.1.4.1</element>
+
+Secondly, create a copy of the default ``storescu.cfg`` configuration
+file, e.g. on Ubuntu 18.04::
+
+  $ cp /etc/dcmtk/storescu.cfg /tmp/storescu.cfg
+
+Edit this file so as to replace one of the 128 preconfigured
+presentation contexts, using this information::
+
+  $ diff /etc/dcmtk/storescu.cfg storescu.cfg 
+  198c198
+  < PresentationContext128 = VideoPhotographicImageStorage\MPEG2
+  ---
+  > PresentationContext128 = 1.2.840.10008.5.1.4.1.1.77.1.4.1\MPEG4
+
+Obviously, you can replace more predefinitions if other pairs of SOP
+class UID and transfer syntax are needed. Finally, run ``storescu``
+using this new configuration::
+
+  $ storescu -xf /tmp/storescu.cfg Default localhost 4242 XC000000.dcm
+  
+Note that the ``storescu`` command from the `dcm4che project
+<https://www.dcm4che.org/>`__ might be more easy to use in such
+situations.