changeset 656:55a93745e874

use little endian explicit instead of implicit
author Sebastien Jodogne <s.jodogne@gmail.com>
date Wed, 28 Apr 2021 16:16:33 +0200
parents 35dde917804a
children 566f0af3e4ed
files Sphinx/source/faq/troubleshooting.rst
diffstat 1 files changed, 17 insertions(+), 6 deletions(-) [+]
line wrap: on
line diff
--- a/Sphinx/source/faq/troubleshooting.rst	Wed Apr 28 16:04:55 2021 +0200
+++ b/Sphinx/source/faq/troubleshooting.rst	Wed Apr 28 16:16:33 2021 +0200
@@ -48,6 +48,17 @@
   The core team of Orthanc will **only provide support for DICOM files
   that are reported as valid** by ``dciodvfy``.
 
+* Side-note: The default transfer syntax of DICOM is Little Endian
+  Implicit (``1.2.840.10008.1.2``). For DICOM files that include
+  private tags, **we recommend using Little Endian Explicit**
+  (``1.2.840.10008.1.2.1``) instead Little Endian Implicit whenever
+  possible. Instead, in Little Endian Explicit, each DICOM tag has an
+  explicit declaration of its value representation (type), which
+  contrasts with Little Endian Implicit that necessitates to configure
+  the dictionary of private tags to be properly handled in some
+  operations (cf. the ``Dictionary`` :ref:`configuration option
+  <configuration>`).
+  
   
 Orthanc Explorer
 ----------------
@@ -133,13 +144,13 @@
 
 Orthanc stores, in its database, an `MD5 hash
 <https://en.wikipedia.org/wiki/MD5>`_ of the files stored in its
-:ref:`storage area <orthanc-storage>` (that notably contains the DICOM
-files), provided that the ``StoreMD5ForAttachments`` configuration
-option is set to ``true``.
+:ref:`storage area <orthanc-storage>` (which notably includes the
+DICOM files), provided that the ``StoreMD5ForAttachments``
+configuration option is set to ``true``.
 
-This MD5 corresponds to the hash of the stored files in memory, before
-they are written to the disk by Orthanc. This information is safely
-stored inside the database for any incoming file attachment.
+This MD5 corresponds to the hash of the files in memory, before they
+are written to the disk by Orthanc. This information is safely stored
+inside the database for any incoming file attachment.
 
 It is possible to ask Orthanc to check by itself whether some attachment
 file was corrupted (i.e. to check whether the MD5 hash stored in the