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annotate Sphinx/source/plugins/webviewer.rst @ 358:011b01ccf52d
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| author | Sebastien Jodogne <s.jodogne@gmail.com> |
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| date | Mon, 30 Mar 2020 18:47:35 +0200 |
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| 24 | 1 .. _webviewer: |
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| 303 | 4 Orthanc Web Viewer plugin |
| 5 ========================= | |
| 24 | 6 |
| 27 | 7 .. contents:: |
| 8 | |
| 24 | 9 This **official** plugin extends Orthanc with a Web viewer of medical images. |
| 27 | 10 |
| 11 For general information, check out the `official homepage of the | |
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12 plugin <https://www.orthanc-server.com/static.php?page=web-viewer>`__. |
| 28 | 13 |
| 14 | |
| 15 Compilation | |
| 16 ----------- | |
| 17 | |
| 81 | 18 .. highlight:: bash |
| 28 | 19 |
| 20 The procedure to compile these plugins is similar of that for the | |
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21 :ref:`core of Orthanc <binaries>`. The following commands should work |
| 28 | 22 for every UNIX-like distribution (including GNU/Linux):: |
| 23 | |
| 24 $ mkdir Build | |
| 25 $ cd Build | |
| 81 | 26 $ cmake .. -DSTATIC_BUILD=ON -DCMAKE_BUILD_TYPE=Release |
| 28 | 27 $ make |
| 28 | |
| 29 The compilation will produce a shared library ``OrthancWebViewer`` | |
| 30 that contains the Web viewer plugin. Pre-compiled binaries for | |
| 31 Microsoft Windows `are also available | |
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32 <https://www.orthanc-server.com/browse.php?path=/plugin-webviewer>`__. |
| 28 | 33 |
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34 *Remark:* Some older build instructions are also available in the |
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35 `source distribution |
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36 <https://bitbucket.org/sjodogne/orthanc-webviewer/src/default/Resources/BuildInstructions.txt>`__. |
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37 |
| 28 | 38 |
| 39 Usage | |
| 40 ----- | |
| 41 | |
| 42 .. highlight:: json | |
| 43 | |
| 44 You of course first have to :ref:`install Orthanc <compiling>`. Once | |
| 45 Orthanc is installed, you must change the :ref:`configuration file | |
| 46 <configuration>` to tell Orthanc where it can find the plugin: This is | |
| 47 done by properly modifying the ``Plugins`` option. You could for | |
| 48 instance use the following configuration file:: | |
| 49 | |
| 50 { | |
| 51 "Name" : "MyOrthanc", | |
| 52 [...] | |
| 53 "Plugins" : [ | |
| 54 "/home/user/OrthancWebViewer/Build/libOrthancWebViewer.so" | |
| 55 ] | |
| 56 } | |
| 57 | |
| 58 .. highlight:: text | |
| 59 | |
| 60 Orthanc must of course be restarted after the modification of its | |
| 61 configuration file. The log will contain an output similar to:: | |
| 62 | |
| 63 # Orthanc ./Configuration.json | |
| 64 W0226 16:59:10.480226 7906 main.cpp:636] Orthanc version: mainline | |
| 65 [...] | |
| 66 W0226 16:59:10.519664 7906 PluginsManager.cpp:258] Registering plugin 'web-viewer' (version 1.0) | |
| 67 W0226 16:59:10.519696 7906 PluginsManager.cpp:148] Initializing the Web viewer | |
| 68 W0226 16:59:10.520004 7906 PluginsManager.cpp:148] Web viewer using 6 threads for the decoding of the DICOM images | |
| 69 W0226 16:59:10.520021 7906 PluginsManager.cpp:148] Storing the cache of the Web viewer in folder: OrthancStorage/WebViewerCache | |
| 70 W0226 16:59:10.522011 7906 PluginsManager.cpp:148] Web viewer using a cache of 100 MB | |
| 71 [...] | |
| 72 W0226 16:59:10.530807 7906 main.cpp:516] HTTP server listening on port: 8042 | |
| 73 W0226 16:59:10.581029 7906 main.cpp:526] DICOM server listening on port: 4242 | |
| 74 W0226 16:59:10.581066 7906 main.cpp:533] Orthanc has started | |
| 75 | |
| 76 Once a :ref:`DICOM series <model-world>` is opened using Orthanc | |
| 77 Explorer, a yellow button entitled ``Orthanc Web Viewer`` will show | |
| 78 up. It will open the Web viewer for that particular series. See also | |
| 79 the demonstration video on `official homepage of the plugin | |
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80 <https://www.orthanc-server.com/static.php?page=web-viewer>`__. |
| 28 | 81 |
| 82 | |
| 83 Advanced options | |
| 84 ---------------- | |
| 85 | |
| 86 .. highlight:: json | |
| 87 | |
| 88 The configuration of the Web viewer can be fine-tuned by adding some options:: | |
| 89 | |
| 90 { | |
| 91 "Name" : "MyOrthanc", | |
| 92 [...] | |
| 93 "Plugins" : [ | |
| 94 "/home/user/OrthancWebViewer/Build/libOrthancWebViewer.so" | |
| 95 ], | |
| 96 "WebViewer" : { | |
| 97 "CachePath" : "WebViewerCache", | |
| 98 "CacheSize" : 10, | |
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99 "Threads" : 4, |
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100 "EnableGdcm" : false |
| 28 | 101 } |
| 102 } | |
| 103 | |
| 104 * ``CachePath`` specifies the location of the cache of the Web | |
| 105 viewer. By default, the cache is located inside the storage | |
| 106 directory of Orthanc. | |
| 107 * ``CacheSize`` specifies the maximum size for the cached images, in | |
| 108 megabytes. By default, a cache of 100 MB is used. | |
| 109 * ``Threads`` specifies the number of threads that are used by the | |
| 110 plugin to decode the DICOM images. | |
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111 * ``EnableGdcm`` specifies whether `GDCM |
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112 <https://sourceforge.net/projects/gdcm/>`__ should be used to decode |
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113 DICOM images, replacing the built-in decoder of Orthanc that |
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114 internally uses `DCMTK <https://dicom.offis.de/dcmtk.php.en>`__. |
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115 This is notably necessary to deal with DICOM images encoded using |
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116 `JPEG2000 <https://en.wikipedia.org/wiki/JPEG_2000>`__, as this |
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117 format is not readily supported by the core version of DCMTK. By |
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118 default, this option is set to ``true``. |
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119 |
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120 As a complement to the ``EnableGdcm`` option, you also have the |
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121 possibility to restrict the GDCM decoder to some specific `transfer |
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122 syntaxes |
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123 <http://dicom.nema.org/medical/dicom/current/output/html/part05.html#chapter_10>`__ |
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124 using the ``RestrictTransferSyntaxes`` option. For instance, the |
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125 following configuration would use GDCM to decode JPEG 2000 images, |
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126 while using DCMTK to decode the other transfer syntaxes:: |
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127 |
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128 { |
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129 [...] |
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130 "WebViewer" : { |
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131 "EnableGdcm" : true, |
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132 "RestrictTransferSyntaxes" : [ |
| 45 | 133 "1.2.840.10008.1.2.4.90", // JPEG 2000 Image Compression (Lossless Only) |
| 134 "1.2.840.10008.1.2.4.91", // JPEG 2000 Image Compression | |
| 135 "1.2.840.10008.1.2.4.92", // JPEG 2000 Part 2 Multicomponent Image Compression (Lossless Only) | |
| 136 "1.2.840.10008.1.2.4.93" // JPEG 2000 Part 2 Multicomponent Image Compression | |
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137 ] |
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138 } |
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139 } |
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140 |
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141 |
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142 Frequently Asked Questions |
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143 -------------------------- |
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144 |
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145 * If **Orthanc does not start anymore** after a hard shutdown, this |
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146 might reflect a corruption in the cache of the Web viewer. In such a |
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147 case, it is safe to remove the folder that contains the cache. By |
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148 default, this folder is called |
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149 ``OrthancStorage/WebViewerCache/``. Of course, don't remove the |
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150 folder ``OrthancStorage/``, as it contains the DICOM files. |