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1 /**
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2 * Stone of Orthanc
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3 * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics
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4 * Department, University Hospital of Liege, Belgium
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5 *
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6 * This program is free software: you can redistribute it and/or
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7 * modify it under the terms of the GNU General Public License as
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8 * published by the Free Software Foundation, either version 3 of the
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9 * License, or (at your option) any later version.
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10 *
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11 * In addition, as a special exception, the copyright holders of this
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12 * program give permission to link the code of its release with the
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13 * OpenSSL project's "OpenSSL" library (or with modified versions of it
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14 * that use the same license as the "OpenSSL" library), and distribute
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15 * the linked executables. You must obey the GNU General Public License
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16 * in all respects for all of the code used other than "OpenSSL". If you
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17 * modify file(s) with this exception, you may extend this exception to
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18 * your version of the file(s), but you are not obligated to do so. If
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19 * you do not wish to do so, delete this exception statement from your
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20 * version. If you delete this exception statement from all source files
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21 * in the program, then also delete it here.
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22 *
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23 * This program is distributed in the hope that it will be useful, but
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24 * WITHOUT ANY WARRANTY; without even the implied warranty of
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25 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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26 * General Public License for more details.
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27 *
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28 * You should have received a copy of the GNU General Public License
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29 * along with this program. If not, see <http://www.gnu.org/licenses/>.
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30 **/
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31
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32
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33 #include "SeriesFrameRendererFactory.h"
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34
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35 #include "FrameRenderer.h"
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16
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36 #include "../../Resources/Orthanc/Core/OrthancException.h"
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32
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37 #include "../../Resources/Orthanc/Core/Logging.h"
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38 #include "../../Resources/Orthanc/Core/Toolbox.h"
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39 #include "../../Resources/Orthanc/Plugins/Samples/Common/OrthancPluginException.h"
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40 #include "../../Resources/Orthanc/Plugins/Samples/Common/DicomDatasetReader.h"
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41
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0
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42
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43 namespace OrthancStone
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44 {
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45 void SeriesFrameRendererFactory::ReadCurrentFrameDataset(size_t frame)
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46 {
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47 if (currentDataset_.get() != NULL &&
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48 (fast_ || currentFrame_ == frame))
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49 {
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50 // The frame has not changed since the previous call, no need to
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51 // update the DICOM dataset
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52 return;
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53 }
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54
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55 currentDataset_.reset(loader_->DownloadDicom(frame));
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56 currentFrame_ = frame;
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57
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58 if (currentDataset_.get() == NULL)
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59 {
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60 throw Orthanc::OrthancException(Orthanc::ErrorCode_InternalError);
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61 }
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62 }
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63
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64
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65 void SeriesFrameRendererFactory::GetCurrentPixelSpacing(double& spacingX,
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66 double& spacingY) const
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67 {
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68 if (currentDataset_.get() == NULL)
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69 {
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70 // There was no previous call "ReadCurrentFrameDataset()"
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71 throw Orthanc::OrthancException(Orthanc::ErrorCode_InternalError);
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72 }
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73
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74 GeometryToolbox::GetPixelSpacing(spacingX, spacingY, *currentDataset_);
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75 }
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76
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77
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78 double SeriesFrameRendererFactory::GetCurrentSliceThickness() const
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79 {
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80 if (currentDataset_.get() == NULL)
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81 {
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82 // There was no previous call "ReadCurrentFrameDataset()"
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83 throw Orthanc::OrthancException(Orthanc::ErrorCode_InternalError);
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84 }
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32
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85
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86 try
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87 {
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32
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88 OrthancPlugins::DicomDatasetReader reader(*currentDataset_);
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89
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90 double thickness;
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91 if (reader.GetDoubleValue(thickness, OrthancPlugins::DICOM_TAG_SLICE_THICKNESS))
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92 {
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93 return thickness;
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94 }
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0
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95 }
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32
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96 catch (ORTHANC_PLUGINS_EXCEPTION_CLASS& e)
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0
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97 {
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98 }
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32
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99
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100 // Some arbitrary large slice thickness
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101 return std::numeric_limits<double>::infinity();
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102 }
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103
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104
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105 SeriesFrameRendererFactory::SeriesFrameRendererFactory(ISeriesLoader* loader, // Takes ownership
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106 bool fast) :
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107 loader_(loader),
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108 currentFrame_(0),
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109 fast_(fast)
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110 {
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111 if (loader == NULL)
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112 {
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113 throw Orthanc::OrthancException(Orthanc::ErrorCode_InternalError);
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114 }
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115 }
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116
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117
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118 bool SeriesFrameRendererFactory::GetExtent(double& x1,
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119 double& y1,
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120 double& x2,
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121 double& y2,
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122 const SliceGeometry& viewportSlice)
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123 {
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124 if (currentDataset_.get() == NULL)
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125 {
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126 // There has been no previous call to
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127 // "CreateLayerRenderer". Read some arbitrary DICOM frame, the
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128 // one at the middle of the series.
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129 unsigned int depth = loader_->GetGeometry().GetSliceCount();
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130 ReadCurrentFrameDataset(depth / 2);
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131 }
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132
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133 double spacingX, spacingY;
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134 GetCurrentPixelSpacing(spacingX, spacingY);
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135
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136 return FrameRenderer::ComputeFrameExtent(x1, y1, x2, y2,
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137 viewportSlice,
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138 loader_->GetGeometry().GetSlice(0),
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139 loader_->GetWidth(),
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140 loader_->GetHeight(),
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141 spacingX, spacingY);
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142 }
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143
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144
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145 ILayerRenderer* SeriesFrameRendererFactory::CreateLayerRenderer(const SliceGeometry& viewportSlice)
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146 {
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147 size_t closest;
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148 double distance;
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149
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150 bool isOpposite;
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151 if (!GeometryToolbox::IsParallelOrOpposite(isOpposite, loader_->GetGeometry().GetNormal(), viewportSlice.GetNormal()) ||
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152 !loader_->GetGeometry().ComputeClosestSlice(closest, distance, viewportSlice.GetOrigin()))
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153 {
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154 // Unable to compute the slice in the series that is the
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155 // closest to the slice displayed by the viewport
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156 return NULL;
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157 }
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158
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159 ReadCurrentFrameDataset(closest);
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160 assert(currentDataset_.get() != NULL);
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161
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162 double spacingX, spacingY;
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163 GetCurrentPixelSpacing(spacingX, spacingY);
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164
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165 if (distance <= GetCurrentSliceThickness() / 2.0)
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166 {
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167 SliceGeometry frameSlice(*currentDataset_);
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168 return FrameRenderer::CreateRenderer(loader_->DownloadFrame(closest),
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169 viewportSlice,
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170 frameSlice,
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171 *currentDataset_,
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172 spacingX, spacingY,
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173 true);
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174 }
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175 else
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176 {
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177 // The closest slice of the series is too far away from the
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178 // slice displayed by the viewport
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179 return NULL;
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180 }
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181 }
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182
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183
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184 ISliceableVolume& SeriesFrameRendererFactory::GetSourceVolume() const
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185 {
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186 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadSequenceOfCalls);
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187 }
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188 }
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