--- a/Core/DicomParsing/DicomModification.cpp	Tue Apr 17 11:42:01 2018 +0200
+++ b/Core/DicomParsing/DicomModification.cpp	Tue Apr 17 13:03:34 2018 +0200
@@ -247,7 +247,19 @@
 
     if (previous == uidMap_.end())
     {
-      mapped = FromDcmtkBridge::GenerateUniqueIdentifier(level);
+      if (identifierGenerator_ == NULL)
+      {
+        mapped = FromDcmtkBridge::GenerateUniqueIdentifier(level);
+      }
+      else
+      {
+        if (!identifierGenerator_->Apply(mapped, original, level, currentSource_))
+        {
+          LOG(ERROR) << "Unable to generate an anonymized ID";
+          throw Orthanc::OrthancException(Orthanc::ErrorCode_InternalError);
+        }
+      }
+
       uidMap_.insert(std::make_pair(std::make_pair(level, original), mapped));
     }
     else
@@ -302,7 +314,8 @@
     allowManualIdentifiers_(true),
     keepStudyInstanceUid_(false),
     keepSeriesInstanceUid_(false),
-    updateReferencedRelationships_(true)
+    updateReferencedRelationships_(true),
+    identifierGenerator_(NULL)
   {
   }
 
@@ -948,6 +961,14 @@
     }
 
 
+    // (0) Create a summary of the source file, if a custom generator
+    // is provided
+    if (identifierGenerator_ != NULL)
+    {
+      toModify.ExtractDicomSummary(currentSource_);
+    }
+
+
     // (1) Remove the private tags, if need be
     if (removePrivateTags_)
     {

--- a/Core/DicomParsing/DicomModification.h	Tue Apr 17 11:42:01 2018 +0200
+++ b/Core/DicomParsing/DicomModification.h	Tue Apr 17 13:03:34 2018 +0200
@@ -53,6 +53,19 @@
       TagOperation_Remove
     };
 
+    class IDicomIdentifierGenerator : public boost::noncopyable
+    {
+    public:
+      virtual ~IDicomIdentifierGenerator()
+      {
+      }
+
+      virtual bool Apply(std::string& target,
+                         const std::string& sourceIdentifier,
+                         ResourceType level,
+                         const DicomMap& sourceDicom) = 0;                       
+    };
+
   private:
     class RelationshipsVisitor;
 
@@ -71,6 +84,9 @@
     bool keepStudyInstanceUid_;
     bool keepSeriesInstanceUid_;
     bool updateReferencedRelationships_;
+    DicomMap currentSource_;
+
+    IDicomIdentifierGenerator* identifierGenerator_;
 
     std::string MapDicomIdentifier(const std::string& original,
                                    ResourceType level);
@@ -151,5 +167,10 @@
 
     void ParseAnonymizationRequest(bool& patientNameReplaced,
                                    const Json::Value& request);
+
+    void SetDicomIdentifierGenerator(IDicomIdentifierGenerator& generator)
+    {
+      identifierGenerator_ = &generator;
+    }
   };
 }