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39
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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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439
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5 * Copyright (C) 2017-2019 Osimis S.A., Belgium
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39
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6 *
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7 * This program is free software: you can redistribute it and/or
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8 * modify it under the terms of the GNU Affero General Public License
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9 * as published by the Free Software Foundation, either version 3 of
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10 * the License, or (at your option) any later version.
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39
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11 *
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12 * This program is distributed in the hope that it will be useful, but
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13 * WITHOUT ANY WARRANTY; without even the implied warranty of
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14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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15 * Affero General Public License for more details.
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16 *
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17 * You should have received a copy of the GNU Affero General Public License
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39
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18 * along with this program. If not, see <http://www.gnu.org/licenses/>.
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19 **/
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20
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21
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22 #include "DicomDataset.h"
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23
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24 #include "../../Resources/Orthanc/Core/OrthancException.h"
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25 #include "../../Resources/Orthanc/Core/Logging.h"
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26 #include "../../Resources/Orthanc/Core/Toolbox.h"
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27
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28 #include <boost/lexical_cast.hpp>
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29 #include <json/value.h>
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30 #include <json/reader.h>
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31
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32 namespace OrthancStone
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33 {
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34 static uint16_t GetCharValue(char c)
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35 {
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36 if (c >= '0' && c <= '9')
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37 return c - '0';
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38 else if (c >= 'a' && c <= 'f')
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39 return c - 'a' + 10;
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40 else if (c >= 'A' && c <= 'F')
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41 return c - 'A' + 10;
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42 else
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43 return 0;
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44 }
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45
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46
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47 static uint16_t GetHexadecimalValue(const char* c)
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48 {
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49 return ((GetCharValue(c[0]) << 12) +
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50 (GetCharValue(c[1]) << 8) +
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51 (GetCharValue(c[2]) << 4) +
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52 GetCharValue(c[3]));
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53 }
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54
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55
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56 static DicomDataset::Tag ParseTag(const std::string& tag)
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57 {
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58 if (tag.size() == 9 &&
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59 isxdigit(tag[0]) &&
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60 isxdigit(tag[1]) &&
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61 isxdigit(tag[2]) &&
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62 isxdigit(tag[3]) &&
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63 (tag[4] == '-' || tag[4] == ',') &&
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64 isxdigit(tag[5]) &&
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65 isxdigit(tag[6]) &&
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66 isxdigit(tag[7]) &&
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67 isxdigit(tag[8]))
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68 {
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69 uint16_t group = GetHexadecimalValue(tag.c_str());
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70 uint16_t element = GetHexadecimalValue(tag.c_str() + 5);
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71 return std::make_pair(group, element);
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72 }
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73 else if (tag.size() == 8 &&
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74 isxdigit(tag[0]) &&
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75 isxdigit(tag[1]) &&
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76 isxdigit(tag[2]) &&
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77 isxdigit(tag[3]) &&
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78 isxdigit(tag[4]) &&
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79 isxdigit(tag[5]) &&
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80 isxdigit(tag[6]) &&
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81 isxdigit(tag[7]))
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82 {
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83 uint16_t group = GetHexadecimalValue(tag.c_str());
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84 uint16_t element = GetHexadecimalValue(tag.c_str() + 4);
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85 return std::make_pair(group, element);
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86 }
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87 else
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88 {
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89 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadFileFormat);
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90 }
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91 }
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92
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93 void DicomDataset::Parse(const std::string& content)
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94 {
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95 Json::Value json;
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96 Json::Reader reader;
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97 if (!reader.parse(content, json))
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98 {
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99 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadFileFormat);
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100 }
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101
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102 Parse(json);
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103 }
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104
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105
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106 void DicomDataset::Parse(const Json::Value& content)
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107 {
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108 if (content.type() != Json::objectValue)
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109 {
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110 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadFileFormat);
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111 }
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112
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113 Json::Value::Members members = content.getMemberNames();
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114 for (size_t i = 0; i < members.size(); i++)
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115 {
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116 Tag tag = ParseTag(members[i]);
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117
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118 const Json::Value& item = content[members[i]];
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119
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120 if (item.type() != Json::objectValue ||
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121 !item.isMember("Type") ||
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122 !item.isMember("Value") ||
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123 !item.isMember("Name") ||
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124 item["Type"].type() != Json::stringValue ||
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125 item["Name"].type() != Json::stringValue)
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126 {
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127 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadFileFormat);
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128 }
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129
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130 if (item["Type"].asString() == "String")
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131 {
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132 if (item["Value"].type() == Json::stringValue)
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133 {
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134 values_[tag] = item["Value"].asString();
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135 }
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136 else
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137 {
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138 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadFileFormat);
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139 }
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140 }
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141 }
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142 }
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143
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144
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145 DicomDataset::DicomDataset(OrthancPlugins::IOrthancConnection& orthanc,
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146 const std::string& instanceId)
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147 {
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148 std::string content;
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149 orthanc.RestApiGet(content, "/instances/" + instanceId + "/tags");
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150
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151 Parse(content);
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152 }
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153
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154
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155 std::string DicomDataset::GetStringValue(const Tag& tag) const
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156 {
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157 Values::const_iterator it = values_.find(tag);
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158
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159 if (it == values_.end())
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160 {
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161 LOG(ERROR) << "Trying to access a DICOM tag that is not set in a DICOM dataset";
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162 throw Orthanc::OrthancException(Orthanc::ErrorCode_InexistentItem);
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163 }
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164 else
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165 {
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166 return it->second;
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167 }
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168 }
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169
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170
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171 std::string DicomDataset::GetStringValue(const Tag& tag,
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172 const std::string& defaultValue) const
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173 {
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174 Values::const_iterator it = values_.find(tag);
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175
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176 if (it == values_.end())
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177 {
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178 return defaultValue;
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179 }
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180 else
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181 {
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182 return it->second;
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183 }
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184 }
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185
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186
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187 float DicomDataset::GetFloatValue(const Tag& tag) const
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188 {
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189 try
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190 {
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191 return boost::lexical_cast<float>(Orthanc::Toolbox::StripSpaces(GetStringValue(tag)));
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192 }
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193 catch (boost::bad_lexical_cast&)
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194 {
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195 LOG(ERROR) << "Trying to access a DICOM tag that is not a float";
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196 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadFileFormat);
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197 }
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198 }
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199
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200
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201 double DicomDataset::GetDoubleValue(const Tag& tag) const
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202 {
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203 try
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204 {
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205 return boost::lexical_cast<double>(Orthanc::Toolbox::StripSpaces(GetStringValue(tag)));
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206 }
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207 catch (boost::bad_lexical_cast&)
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208 {
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209 LOG(ERROR) << "Trying to access a DICOM tag that is not a float";
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210 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadFileFormat);
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211 }
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212 }
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213
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214
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215 int DicomDataset::GetIntegerValue(const Tag& tag) const
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216 {
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217 try
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218 {
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219 return boost::lexical_cast<int>(Orthanc::Toolbox::StripSpaces(GetStringValue(tag)));
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220 }
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221 catch (boost::bad_lexical_cast&)
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222 {
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223 LOG(ERROR) << "Trying to access a DICOM tag that is not an integer";
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224 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadFileFormat);
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225 }
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226 }
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227
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228
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229 unsigned int DicomDataset::GetUnsignedIntegerValue(const Tag& tag) const
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230 {
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231 int v = GetIntegerValue(tag);
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232
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233 if (v < 0)
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234 {
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235 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadFileFormat);
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236 }
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237 else
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238 {
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239 return static_cast<unsigned int>(v);
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240 }
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241 }
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242
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243
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244 void DicomDataset::GetVectorValue(Vector& vector,
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245 const Tag& tag) const
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246 {
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247 if (!GeometryToolbox::ParseVector(vector, Orthanc::Toolbox::StripSpaces(GetStringValue(tag))))
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248 {
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249 LOG(ERROR) << "Trying to access a DICOM tag that is not a vector";
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250 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadFileFormat);
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251 }
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252 }
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253
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254
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255 void DicomDataset::GetVectorValue(Vector& vector,
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256 const Tag& tag,
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257 size_t expectedSize) const
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258 {
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259 GetVectorValue(vector, tag);
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260
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261 if (vector.size() != expectedSize)
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262 {
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263 LOG(ERROR) << "A vector in a DICOM tag has a bad size";
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264 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadFileFormat);
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265 }
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266 }
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267
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268
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269 void DicomDataset::Print() const
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270 {
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271 for (Values::const_iterator it = values_.begin(); it != values_.end(); ++it)
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272 {
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273 printf("%04x,%04x = [%s]\n", it->first.first, it->first.second, it->second.c_str());
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274 }
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275 printf("\n");
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276 }
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277
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278
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279 bool DicomDataset::IsGrayscale() const
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280 {
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281 std::string photometric = Orthanc::Toolbox::StripSpaces(GetStringValue(DICOM_TAG_PHOTOMETRIC_INTERPRETATION));
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282
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283 return (photometric == "MONOCHROME1" ||
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284 photometric == "MONOCHROME2");
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285 }
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286
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287
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288 void DicomDataset::GetPixelSpacing(double& spacingX,
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289 double& spacingY) const
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290 {
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291 if (HasTag(DICOM_TAG_PIXEL_SPACING))
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292 {
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293 Vector spacing;
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294 GetVectorValue(spacing, DICOM_TAG_PIXEL_SPACING, 2);
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295 spacingX = spacing[0];
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296 spacingY = spacing[1];
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297 }
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298 else
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299 {
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300 spacingX = 1.0;
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301 spacingY = 1.0;
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302 }
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303 }
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304 }
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