Mercurial > hg > orthanc
annotate OrthancServer/OrthancFindRequestHandler.cpp @ 700:0fe6632864b9
ubuntu 13.10
| author | Sebastien Jodogne <s.jodogne@gmail.com> |
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| date | Fri, 07 Feb 2014 21:34:09 +0100 |
| parents | 2e67366aab83 |
| children | 6a1dbba0cca7 |
| rev | line source |
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1 /** |
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2 * Orthanc - A Lightweight, RESTful DICOM Store |
| 689 | 3 * Copyright (C) 2012-2014 Medical Physics Department, CHU of Liege, |
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4 * 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 #include "OrthancFindRequestHandler.h" |
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33 |
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34 #include <glog/logging.h> |
| 608 | 35 #include <boost/regex.hpp> |
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36 |
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37 #include "../Core/DicomFormat/DicomArray.h" |
| 608 | 38 #include "ServerToolbox.h" |
| 618 | 39 #include "OrthancInitialization.h" |
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40 |
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41 namespace Orthanc |
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42 { |
| 615 | 43 static bool IsWildcard(const std::string& constraint) |
| 44 { | |
| 45 return (constraint.find('-') != std::string::npos || | |
| 46 constraint.find('*') != std::string::npos || | |
| 47 constraint.find('\\') != std::string::npos || | |
| 48 constraint.find('?') != std::string::npos); | |
| 49 } | |
| 50 | |
| 608 | 51 static bool ApplyRangeConstraint(const std::string& value, |
| 52 const std::string& constraint) | |
| 53 { | |
| 610 | 54 size_t separator = constraint.find('-'); |
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55 std::string lower, upper, v; |
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56 Toolbox::ToLowerCase(lower, constraint.substr(0, separator)); |
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57 Toolbox::ToLowerCase(upper, constraint.substr(separator + 1)); |
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58 Toolbox::ToLowerCase(v, value); |
| 610 | 59 |
| 60 if (lower.size() == 0 && upper.size() == 0) | |
| 61 { | |
| 62 return false; | |
| 63 } | |
| 64 | |
| 65 if (lower.size() == 0) | |
| 66 { | |
| 67 return v <= upper; | |
| 68 } | |
| 69 | |
| 70 if (upper.size() == 0) | |
| 71 { | |
| 72 return v >= lower; | |
| 73 } | |
| 74 | |
| 75 return (v >= lower && v <= upper); | |
| 608 | 76 } |
| 77 | |
| 78 | |
| 79 static bool ApplyListConstraint(const std::string& value, | |
| 80 const std::string& constraint) | |
| 81 { | |
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82 std::string v1; |
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83 Toolbox::ToLowerCase(v1, value); |
| 608 | 84 |
| 85 std::vector<std::string> items; | |
| 86 Toolbox::TokenizeString(items, constraint, '\\'); | |
| 87 | |
| 88 for (size_t i = 0; i < items.size(); i++) | |
| 89 { | |
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90 std::string lower; |
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91 Toolbox::ToLowerCase(lower, items[i]); |
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92 if (lower == v1) |
| 608 | 93 { |
| 94 return true; | |
| 95 } | |
| 96 } | |
| 97 | |
| 98 return false; | |
| 99 } | |
| 100 | |
| 101 | |
| 102 static bool Matches(const std::string& value, | |
| 103 const std::string& constraint) | |
| 104 { | |
| 105 // http://www.itk.org/Wiki/DICOM_QueryRetrieve_Explained | |
| 106 // http://dicomiseasy.blogspot.be/2012/01/dicom-queryretrieve-part-i.html | |
| 107 | |
| 108 if (constraint.find('-') != std::string::npos) | |
| 109 { | |
| 110 return ApplyRangeConstraint(value, constraint); | |
| 111 } | |
| 112 | |
| 113 if (constraint.find('\\') != std::string::npos) | |
| 114 { | |
| 115 return ApplyListConstraint(value, constraint); | |
| 116 } | |
| 117 | |
| 118 if (constraint.find('*') != std::string::npos || | |
| 119 constraint.find('?') != std::string::npos) | |
| 120 { | |
| 121 // TODO - Cache the constructed regular expression | |
| 122 boost::regex pattern(Toolbox::WildcardToRegularExpression(constraint), | |
| 123 boost::regex::icase /* case insensitive search */); | |
| 124 return boost::regex_match(value, pattern); | |
| 125 } | |
| 126 else | |
| 127 { | |
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128 std::string v, c; |
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129 Toolbox::ToLowerCase(v, value); |
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130 Toolbox::ToLowerCase(c, constraint); |
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131 return v == c; |
| 608 | 132 } |
| 133 } | |
| 134 | |
| 135 | |
| 136 static bool LookupOneInstance(std::string& result, | |
| 137 ServerIndex& index, | |
| 138 const std::string& id, | |
| 139 ResourceType type) | |
| 140 { | |
| 141 if (type == ResourceType_Instance) | |
| 142 { | |
| 143 result = id; | |
| 144 return true; | |
| 145 } | |
| 146 | |
| 147 std::string childId; | |
| 148 | |
| 149 { | |
| 150 std::list<std::string> children; | |
| 151 index.GetChildInstances(children, id); | |
| 152 | |
| 656 | 153 if (children.empty()) |
| 608 | 154 { |
| 155 return false; | |
| 156 } | |
| 157 | |
| 158 childId = children.front(); | |
| 159 } | |
| 160 | |
| 161 return LookupOneInstance(result, index, childId, GetChildResourceType(type)); | |
| 162 } | |
| 163 | |
| 164 | |
| 165 static bool Matches(const Json::Value& resource, | |
| 166 const DicomArray& query) | |
| 167 { | |
| 168 for (size_t i = 0; i < query.GetSize(); i++) | |
| 169 { | |
| 170 if (query.GetElement(i).GetValue().IsNull() || | |
| 171 query.GetElement(i).GetTag() == DICOM_TAG_QUERY_RETRIEVE_LEVEL || | |
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172 query.GetElement(i).GetTag() == DICOM_TAG_SPECIFIC_CHARACTER_SET || |
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173 query.GetElement(i).GetTag() == DICOM_TAG_MODALITIES_IN_STUDY) |
| 608 | 174 { |
| 175 continue; | |
| 176 } | |
| 177 | |
| 178 std::string tag = query.GetElement(i).GetTag().Format(); | |
| 179 std::string value; | |
| 180 if (resource.isMember(tag)) | |
| 181 { | |
| 182 value = resource.get(tag, Json::arrayValue).get("Value", "").asString(); | |
| 183 } | |
| 184 | |
| 185 if (!Matches(value, query.GetElement(i).GetValue().AsString())) | |
| 186 { | |
| 187 return false; | |
| 188 } | |
| 189 } | |
| 190 | |
| 191 return true; | |
| 192 } | |
| 193 | |
| 194 | |
| 195 static void AddAnswer(DicomFindAnswers& answers, | |
| 196 const Json::Value& resource, | |
| 197 const DicomArray& query) | |
| 198 { | |
| 199 DicomMap result; | |
| 200 | |
| 201 for (size_t i = 0; i < query.GetSize(); i++) | |
| 202 { | |
| 203 if (query.GetElement(i).GetTag() != DICOM_TAG_QUERY_RETRIEVE_LEVEL && | |
| 204 query.GetElement(i).GetTag() != DICOM_TAG_SPECIFIC_CHARACTER_SET) | |
| 205 { | |
| 206 std::string tag = query.GetElement(i).GetTag().Format(); | |
| 207 std::string value; | |
| 208 if (resource.isMember(tag)) | |
| 209 { | |
| 210 value = resource.get(tag, Json::arrayValue).get("Value", "").asString(); | |
| 211 result.SetValue(query.GetElement(i).GetTag(), value); | |
| 212 } | |
| 213 } | |
| 214 } | |
| 215 | |
| 216 answers.Add(result); | |
| 217 } | |
| 218 | |
| 219 | |
| 615 | 220 static bool ApplyModalitiesInStudyFilter(std::list<std::string>& filteredStudies, |
| 221 const std::list<std::string>& studies, | |
| 612 | 222 const DicomMap& input, |
| 223 ServerIndex& index) | |
| 224 { | |
| 615 | 225 filteredStudies.clear(); |
| 612 | 226 |
| 227 const DicomValue& v = input.GetValue(DICOM_TAG_MODALITIES_IN_STUDY); | |
| 228 if (v.IsNull()) | |
| 229 { | |
| 230 return false; | |
| 231 } | |
| 232 | |
| 233 // Move the allowed modalities into a "std::set" | |
| 234 std::vector<std::string> tmp; | |
| 235 Toolbox::TokenizeString(tmp, v.AsString(), '\\'); | |
| 236 | |
| 237 std::set<std::string> modalities; | |
| 238 for (size_t i = 0; i < tmp.size(); i++) | |
| 239 { | |
| 240 modalities.insert(tmp[i]); | |
| 241 } | |
| 242 | |
| 243 // Loop over the studies | |
| 615 | 244 for (std::list<std::string>::const_iterator |
| 656 | 245 it = studies.begin(); it != studies.end(); ++it) |
| 612 | 246 { |
| 247 try | |
| 248 { | |
| 249 // We are considering a single study. Check whether one of | |
| 250 // its child series matches one of the modalities. | |
| 251 Json::Value study; | |
| 615 | 252 if (index.LookupResource(study, *it, ResourceType_Study)) |
| 612 | 253 { |
| 254 // Loop over the series of the considered study. | |
| 255 for (Json::Value::ArrayIndex j = 0; j < study["Series"].size(); j++) // (*) | |
| 256 { | |
| 257 Json::Value series; | |
| 258 if (index.LookupResource(series, study["Series"][j].asString(), ResourceType_Series)) | |
| 259 { | |
| 260 // Get the modality of this series | |
| 261 if (series["MainDicomTags"].isMember("Modality")) | |
| 262 { | |
| 263 std::string modality = series["MainDicomTags"]["Modality"].asString(); | |
| 264 if (modalities.find(modality) != modalities.end()) | |
| 265 { | |
| 266 // This series of the considered study matches one | |
| 267 // of the required modalities. Take the study into | |
| 268 // consideration for future filtering. | |
| 615 | 269 filteredStudies.push_back(*it); |
| 612 | 270 |
| 271 // We have finished considering this study. Break the study loop at (*). | |
| 272 break; | |
| 273 } | |
| 274 } | |
| 275 } | |
| 276 } | |
| 277 } | |
| 278 } | |
| 279 catch (OrthancException&) | |
| 280 { | |
| 281 // This resource has probably been deleted during the find request | |
| 282 } | |
| 283 } | |
| 284 | |
| 285 return true; | |
| 286 } | |
| 287 | |
| 288 | |
| 615 | 289 static bool LookupCandidateResourcesInternal(/* out */ std::list<std::string>& resources, |
| 290 /* in */ ServerIndex& index, | |
| 291 /* in */ ResourceType level, | |
| 292 /* in */ const DicomMap& query, | |
| 293 /* in */ DicomTag tag) | |
| 294 { | |
| 295 if (query.HasTag(tag)) | |
| 296 { | |
| 297 const DicomValue& value = query.GetValue(tag); | |
| 298 if (!value.IsNull()) | |
| 299 { | |
| 300 std::string str = query.GetValue(tag).AsString(); | |
| 301 if (!IsWildcard(str)) | |
| 302 { | |
| 303 index.LookupTagValue(resources, tag, str/*, level*/); | |
| 304 return true; | |
| 305 } | |
| 306 } | |
| 307 } | |
| 308 | |
| 309 return false; | |
| 310 } | |
| 311 | |
| 312 | |
| 313 static void LookupCandidateResources(/* out */ std::list<std::string>& resources, | |
| 314 /* in */ ServerIndex& index, | |
| 315 /* in */ ResourceType level, | |
| 665 | 316 /* in */ const DicomMap& query, |
| 317 /* in */ ModalityManufacturer manufacturer) | |
| 615 | 318 { |
| 319 // TODO : Speed up using full querying against the MainDicomTags. | |
| 320 | |
| 321 resources.clear(); | |
| 322 | |
| 323 bool done = false; | |
| 324 | |
| 325 switch (level) | |
| 326 { | |
| 327 case ResourceType_Patient: | |
| 328 done = LookupCandidateResourcesInternal(resources, index, level, query, DICOM_TAG_PATIENT_ID); | |
| 329 break; | |
| 330 | |
| 331 case ResourceType_Study: | |
| 332 done = LookupCandidateResourcesInternal(resources, index, level, query, DICOM_TAG_STUDY_INSTANCE_UID); | |
| 333 break; | |
| 334 | |
| 335 case ResourceType_Series: | |
| 336 done = LookupCandidateResourcesInternal(resources, index, level, query, DICOM_TAG_SERIES_INSTANCE_UID); | |
| 337 break; | |
| 338 | |
| 339 case ResourceType_Instance: | |
| 665 | 340 if (manufacturer == ModalityManufacturer_MedInria) |
| 341 { | |
| 342 std::list<std::string> series; | |
| 343 | |
| 344 if (LookupCandidateResourcesInternal(series, index, ResourceType_Series, query, DICOM_TAG_SERIES_INSTANCE_UID) && | |
| 345 series.size() == 1) | |
| 346 { | |
| 347 index.GetChildInstances(resources, series.front()); | |
| 348 done = true; | |
| 349 } | |
| 350 } | |
| 351 else | |
| 352 { | |
| 353 done = LookupCandidateResourcesInternal(resources, index, level, query, DICOM_TAG_SOP_INSTANCE_UID); | |
| 354 } | |
| 355 | |
| 615 | 356 break; |
| 357 | |
| 358 default: | |
| 359 break; | |
| 360 } | |
| 361 | |
| 362 if (!done) | |
| 363 { | |
| 364 Json::Value allResources; | |
| 365 index.GetAllUuids(allResources, level); | |
| 366 assert(allResources.type() == Json::arrayValue); | |
| 367 | |
| 368 for (Json::Value::ArrayIndex i = 0; i < allResources.size(); i++) | |
| 369 { | |
| 370 resources.push_back(allResources[i].asString()); | |
| 371 } | |
| 372 } | |
| 373 } | |
| 374 | |
| 375 | |
| 618 | 376 void OrthancFindRequestHandler::Handle(DicomFindAnswers& answers, |
| 665 | 377 const DicomMap& input, |
| 378 const std::string& callingAETitle) | |
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379 { |
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380 /** |
| 665 | 381 * Retrieve the manufacturer of this modality. |
| 382 **/ | |
| 383 | |
| 384 ModalityManufacturer manufacturer; | |
| 385 | |
| 386 { | |
| 387 std::string symbolicName, address; | |
| 388 int port; | |
| 389 | |
| 390 if (!LookupDicomModalityUsingAETitle(callingAETitle, symbolicName, address, port, manufacturer)) | |
| 391 { | |
| 392 throw OrthancException("Unknown modality"); | |
| 393 } | |
| 394 } | |
| 395 | |
| 396 | |
| 397 /** | |
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398 * Retrieve the query level. |
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399 **/ |
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400 |
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401 const DicomValue* levelTmp = input.TestAndGetValue(DICOM_TAG_QUERY_RETRIEVE_LEVEL); |
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402 if (levelTmp == NULL) |
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403 { |
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404 throw OrthancException(ErrorCode_BadRequest); |
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405 } |
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406 |
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407 ResourceType level = StringToResourceType(levelTmp->AsString().c_str()); |
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408 |
| 665 | 409 switch (manufacturer) |
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410 { |
| 665 | 411 case ModalityManufacturer_MedInria: |
| 412 // MedInria makes FIND requests at the instance level before starting MOVE | |
| 413 break; | |
| 414 | |
| 415 default: | |
| 416 if (level != ResourceType_Patient && | |
| 417 level != ResourceType_Study && | |
| 418 level != ResourceType_Series) | |
| 419 { | |
| 420 throw OrthancException(ErrorCode_NotImplemented); | |
| 421 } | |
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422 } |
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423 |
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424 |
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425 /** |
| 615 | 426 * Retrieve the candidate resources for this query level. Whenever |
| 427 * possible, we avoid returning ALL the resources for this query | |
| 428 * level, as it would imply reading the JSON file on the harddisk | |
| 429 * for each of them. | |
| 608 | 430 **/ |
| 431 | |
| 615 | 432 std::list<std::string> resources; |
| 665 | 433 LookupCandidateResources(resources, context_.GetIndex(), level, input, manufacturer); |
| 608 | 434 |
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435 |
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436 /** |
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437 * Apply filtering on modalities for studies, if asked (this is an |
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438 * extension to standard DICOM) |
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439 * http://www.medicalconnections.co.uk/kb/Filtering_on_and_Retrieving_the_Modality_in_a_C_FIND |
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440 **/ |
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441 |
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442 if (level == ResourceType_Study && |
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443 input.HasTag(DICOM_TAG_MODALITIES_IN_STUDY)) |
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444 { |
| 615 | 445 std::list<std::string> filtered; |
| 612 | 446 if (ApplyModalitiesInStudyFilter(filtered, resources, input, context_.GetIndex())) |
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447 { |
| 612 | 448 resources = filtered; |
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449 } |
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450 } |
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451 |
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452 |
| 608 | 453 /** |
| 454 * Loop over all the resources for this query level. | |
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455 **/ |
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456 |
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457 DicomArray query(input); |
| 615 | 458 for (std::list<std::string>::const_iterator |
| 656 | 459 resource = resources.begin(); resource != resources.end(); ++resource) |
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460 { |
| 608 | 461 try |
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462 { |
| 608 | 463 std::string instance; |
| 615 | 464 if (LookupOneInstance(instance, context_.GetIndex(), *resource, level)) |
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465 { |
| 615 | 466 Json::Value info; |
| 467 context_.ReadJson(info, instance); | |
| 608 | 468 |
| 615 | 469 if (Matches(info, query)) |
| 608 | 470 { |
| 615 | 471 AddAnswer(answers, info, query); |
| 608 | 472 } |
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473 } |
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474 } |
| 608 | 475 catch (OrthancException&) |
| 476 { | |
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477 // This resource has probably been deleted during the find request |
| 608 | 478 } |
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479 } |
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480 } |
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481 } |
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482 |
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483 |
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484 |
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485 /** |
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486 * TODO : Case-insensitive match for PN value representation (Patient |
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487 * Name). Case-senstive match for all the other value representations. |
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488 * |
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489 * Reference: DICOM PS 3.4 |
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490 * - C.2.2.2.1 ("Single Value Matching") |
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491 * - C.2.2.2.4 ("Wild Card Matching") |
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492 * http://medical.nema.org/Dicom/2011/11_04pu.pdf ( |
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493 **/ |