--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/OrthancServer/DicomModification.cpp	Mon May 05 13:07:10 2014 +0200
@@ -0,0 +1,291 @@
+/**
+ * Orthanc - A Lightweight, RESTful DICOM Store
+ * Copyright (C) 2012-2014 Medical Physics Department, CHU of Liege,
+ * Belgium
+ *
+ * This program is free software: you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * In addition, as a special exception, the copyright holders of this
+ * program give permission to link the code of its release with the
+ * OpenSSL project's "OpenSSL" library (or with modified versions of it
+ * that use the same license as the "OpenSSL" library), and distribute
+ * the linked executables. You must obey the GNU General Public License
+ * in all respects for all of the code used other than "OpenSSL". If you
+ * modify file(s) with this exception, you may extend this exception to
+ * your version of the file(s), but you are not obligated to do so. If
+ * you do not wish to do so, delete this exception statement from your
+ * version. If you delete this exception statement from all source files
+ * in the program, then also delete it here.
+ * 
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ **/
+
+
+#include "DicomModification.h"
+
+#include "../Core/OrthancException.h"
+
+namespace Orthanc
+{
+  void DicomModification::MapDicomIdentifier(ParsedDicomFile& dicom,
+                                             DicomRootLevel level)
+  {
+    std::auto_ptr<DicomTag> tag;
+
+    switch (level)
+    {
+      case DicomRootLevel_Study:
+        tag.reset(new DicomTag(DICOM_TAG_STUDY_INSTANCE_UID));
+        break;
+
+      case DicomRootLevel_Series:
+        tag.reset(new DicomTag(DICOM_TAG_SERIES_INSTANCE_UID));
+        break;
+
+      case DicomRootLevel_Instance:
+        tag.reset(new DicomTag(DICOM_TAG_SOP_INSTANCE_UID));
+        break;
+
+      default:
+        throw OrthancException(ErrorCode_InternalError);
+    }
+
+    std::string original;
+    if (!dicom.GetTagValue(original, *tag))
+    {
+      original = "";
+    }
+
+    std::string mapped;
+
+    UidMap::const_iterator previous = uidMap_.find(std::make_pair(level, original));
+    if (previous == uidMap_.end())
+    {
+      mapped = FromDcmtkBridge::GenerateUniqueIdentifier(level);
+      uidMap_.insert(std::make_pair(std::make_pair(level, original), mapped));
+    }
+    else
+    {
+      mapped = previous->second;
+    }    
+
+    dicom.Replace(*tag, mapped);
+  }
+
+  DicomModification::DicomModification()
+  {
+    removePrivateTags_ = false;
+    level_ = DicomRootLevel_Instance;
+  }
+
+  void DicomModification::Reset(const DicomTag& tag)
+  {
+    removals_.erase(tag);
+    replacements_.erase(tag);
+  }
+
+  void DicomModification::Remove(const DicomTag& tag)
+  {
+    removals_.insert(tag);
+    replacements_.erase(tag);
+  }
+
+  bool DicomModification::IsRemoved(const DicomTag& tag) const
+  {
+    return removals_.find(tag) != removals_.end();
+  }
+
+  void DicomModification::Replace(const DicomTag& tag,
+                                  const std::string& value)
+  {
+    removals_.erase(tag);
+    replacements_[tag] = value;
+  }
+
+  bool DicomModification::IsReplaced(const DicomTag& tag) const
+  {
+    return replacements_.find(tag) != replacements_.end();
+  }
+
+  const std::string& DicomModification::GetReplacement(const DicomTag& tag) const
+  {
+    Replacements::const_iterator it = replacements_.find(tag);
+
+    if (it == replacements_.end())
+    {
+      throw OrthancException(ErrorCode_InexistentItem);
+    }
+    else
+    {
+      return it->second;
+    } 
+  }
+
+  void DicomModification::SetRemovePrivateTags(bool removed)
+  {
+    removePrivateTags_ = removed;
+  }
+
+  void DicomModification::SetLevel(DicomRootLevel level)
+  {
+    uidMap_.clear();
+    level_ = level;
+  }
+
+  void DicomModification::SetupAnonymization()
+  {
+    removals_.clear();
+    replacements_.clear();
+    removePrivateTags_ = true;
+    level_ = DicomRootLevel_Patient;
+    uidMap_.clear();
+
+    // This is Table E.1-1 from PS 3.15-2008 - DICOM Part 15: Security and System Management Profiles
+    removals_.insert(DicomTag(0x0008, 0x0014));  // Instance Creator UID
+    //removals_.insert(DicomTag(0x0008, 0x0018));  // SOP Instance UID => set in Apply()
+    removals_.insert(DicomTag(0x0008, 0x0050));  // Accession Number
+    removals_.insert(DicomTag(0x0008, 0x0080));  // Institution Name
+    removals_.insert(DicomTag(0x0008, 0x0081));  // Institution Address
+    removals_.insert(DicomTag(0x0008, 0x0090));  // Referring Physician's Name 
+    removals_.insert(DicomTag(0x0008, 0x0092));  // Referring Physician's Address 
+    removals_.insert(DicomTag(0x0008, 0x0094));  // Referring Physician's Telephone Numbers 
+    removals_.insert(DicomTag(0x0008, 0x1010));  // Station Name 
+    removals_.insert(DicomTag(0x0008, 0x1030));  // Study Description 
+    removals_.insert(DicomTag(0x0008, 0x103e));  // Series Description 
+    removals_.insert(DicomTag(0x0008, 0x1040));  // Institutional Department Name 
+    removals_.insert(DicomTag(0x0008, 0x1048));  // Physician(s) of Record 
+    removals_.insert(DicomTag(0x0008, 0x1050));  // Performing Physicians' Name 
+    removals_.insert(DicomTag(0x0008, 0x1060));  // Name of Physician(s) Reading Study 
+    removals_.insert(DicomTag(0x0008, 0x1070));  // Operators' Name 
+    removals_.insert(DicomTag(0x0008, 0x1080));  // Admitting Diagnoses Description 
+    removals_.insert(DicomTag(0x0008, 0x1155));  // Referenced SOP Instance UID 
+    removals_.insert(DicomTag(0x0008, 0x2111));  // Derivation Description 
+    //removals_.insert(DicomTag(0x0010, 0x0010));  // Patient's Name => cf. below (*)
+    //removals_.insert(DicomTag(0x0010, 0x0020));  // Patient ID => cf. below (*)
+    removals_.insert(DicomTag(0x0010, 0x0030));  // Patient's Birth Date 
+    removals_.insert(DicomTag(0x0010, 0x0032));  // Patient's Birth Time 
+    removals_.insert(DicomTag(0x0010, 0x0040));  // Patient's Sex 
+    removals_.insert(DicomTag(0x0010, 0x1000));  // Other Patient Ids 
+    removals_.insert(DicomTag(0x0010, 0x1001));  // Other Patient Names 
+    removals_.insert(DicomTag(0x0010, 0x1010));  // Patient's Age 
+    removals_.insert(DicomTag(0x0010, 0x1020));  // Patient's Size 
+    removals_.insert(DicomTag(0x0010, 0x1030));  // Patient's Weight 
+    removals_.insert(DicomTag(0x0010, 0x1090));  // Medical Record Locator 
+    removals_.insert(DicomTag(0x0010, 0x2160));  // Ethnic Group 
+    removals_.insert(DicomTag(0x0010, 0x2180));  // Occupation 
+    removals_.insert(DicomTag(0x0010, 0x21b0));  // Additional Patient's History 
+    removals_.insert(DicomTag(0x0010, 0x4000));  // Patient Comments 
+    removals_.insert(DicomTag(0x0018, 0x1000));  // Device Serial Number 
+    removals_.insert(DicomTag(0x0018, 0x1030));  // Protocol Name 
+    //removals_.insert(DicomTag(0x0020, 0x000d));  // Study Instance UID => set in Apply()
+    //removals_.insert(DicomTag(0x0020, 0x000e));  // Series Instance UID => set in Apply()
+    removals_.insert(DicomTag(0x0020, 0x0010));  // Study ID 
+    removals_.insert(DicomTag(0x0020, 0x0052));  // Frame of Reference UID 
+    removals_.insert(DicomTag(0x0020, 0x0200));  // Synchronization Frame of Reference UID 
+    removals_.insert(DicomTag(0x0020, 0x4000));  // Image Comments 
+    removals_.insert(DicomTag(0x0040, 0x0275));  // Request Attributes Sequence 
+    removals_.insert(DicomTag(0x0040, 0xa124));  // UID
+    removals_.insert(DicomTag(0x0040, 0xa730));  // Content Sequence 
+    removals_.insert(DicomTag(0x0088, 0x0140));  // Storage Media File-set UID 
+    removals_.insert(DicomTag(0x3006, 0x0024));  // Referenced Frame of Reference UID 
+    removals_.insert(DicomTag(0x3006, 0x00c2));  // Related Frame of Reference UID 
+
+    // Some more removals (from the experience of DICOM files at the CHU of Liege)
+    removals_.insert(DicomTag(0x0010, 0x1040));  // Patient's Address
+    removals_.insert(DicomTag(0x0032, 0x1032));  // Requesting Physician
+    removals_.insert(DicomTag(0x0010, 0x2154));  // PatientTelephoneNumbers
+    removals_.insert(DicomTag(0x0010, 0x2000));  // Medical Alerts
+
+    // Set the DeidentificationMethod tag
+    replacements_.insert(std::make_pair(DicomTag(0x0012, 0x0063), "Orthanc " ORTHANC_VERSION " - PS 3.15-2008 Table E.1-1"));
+
+    // Set the PatientIdentityRemoved tag
+    replacements_.insert(std::make_pair(DicomTag(0x0012, 0x0062), "YES"));
+
+    // (*) Choose a random patient name and ID
+    std::string patientId = FromDcmtkBridge::GenerateUniqueIdentifier(DicomRootLevel_Patient);
+    replacements_[DICOM_TAG_PATIENT_ID] = patientId;
+    replacements_[DICOM_TAG_PATIENT_NAME] = patientId;
+  }
+
+  void DicomModification::Apply(ParsedDicomFile& toModify)
+  {
+    // Check the request
+    assert(DicomRootLevel_Patient + 1 == DicomRootLevel_Study &&
+           DicomRootLevel_Study + 1 == DicomRootLevel_Series &&
+           DicomRootLevel_Series + 1 == DicomRootLevel_Instance);
+
+    if (IsRemoved(DICOM_TAG_PATIENT_ID) ||
+        IsRemoved(DICOM_TAG_STUDY_INSTANCE_UID) ||
+        IsRemoved(DICOM_TAG_SERIES_INSTANCE_UID) ||
+        IsRemoved(DICOM_TAG_SOP_INSTANCE_UID))
+    {
+      throw OrthancException(ErrorCode_BadRequest);
+    }
+
+    if (level_ == DicomRootLevel_Patient && !IsReplaced(DICOM_TAG_PATIENT_ID))
+    {
+      throw OrthancException(ErrorCode_BadRequest);
+    }
+
+    if (level_ > DicomRootLevel_Patient && IsReplaced(DICOM_TAG_PATIENT_ID))
+    {
+      throw OrthancException(ErrorCode_BadRequest);
+    }
+
+    if (level_ > DicomRootLevel_Study && IsReplaced(DICOM_TAG_STUDY_INSTANCE_UID))
+    {
+      throw OrthancException(ErrorCode_BadRequest);
+    }
+
+    if (level_ > DicomRootLevel_Series && IsReplaced(DICOM_TAG_SERIES_INSTANCE_UID))
+    {
+      throw OrthancException(ErrorCode_BadRequest);
+    }
+
+    // (1) Remove the private tags, if need be
+    if (removePrivateTags_)
+    {
+      toModify.RemovePrivateTags();
+    }
+
+    // (2) Remove the tags specified by the user
+    for (Removals::const_iterator it = removals_.begin(); 
+         it != removals_.end(); ++it)
+    {
+      toModify.Remove(*it);
+    }
+
+    // (3) Replace the tags
+    for (Replacements::const_iterator it = replacements_.begin(); 
+         it != replacements_.end(); ++it)
+    {
+      toModify.Replace(it->first, it->second, DicomReplaceMode_InsertIfAbsent);
+    }
+
+    // (4) Update the DICOM identifiers
+    if (level_ <= DicomRootLevel_Study)
+    {
+      MapDicomIdentifier(toModify, DicomRootLevel_Study);
+    }
+
+    if (level_ <= DicomRootLevel_Series)
+    {
+      MapDicomIdentifier(toModify, DicomRootLevel_Series);
+    }
+
+    if (level_ <= DicomRootLevel_Instance)  // Always true
+    {
+      MapDicomIdentifier(toModify, DicomRootLevel_Instance);
+    }
+  }
+}