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Dicom File metadata modification error |
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Hi friends,
I am facing one serious problem in my application. I am trying to open dicom image file (.dcm) has size around 400 MB. But I am getting and unhandy exceptions, Some time, {System.AccessViolationException: Attempted to read or write protected memory. This is often an indication that other memory is corrupt. at ?readMedia@BASE_SESSION_CLASS@@ ... NTENT_TYPE_ENUM@@000_N2@Z(BASE_SESSION_CLASS* , basic_string<char\,std::char_traits<char>\,std::allocator<char> >* , Int32 , basic_string<char\,std::char_traits<char>\,std::allocator<char> >* , basic_string<char\,std::char_traits<char>\,std::allocator<char> >* , basic_string<char\,std::char_traits<char>\,std::allocator<char> >* , Boolean , Boolean ) at Wrappers.MBaseSession.ReadMedia(String pFileName) at Dvtk.Sessions.Session.ReadFile(String mediaFileName) at DvtkHighLevelInterface.Dicom.Files.DicomFile.Read(String fullFileName, ScriptSession dvtkScriptSession) at DvtkHighLevelInterface.Dicom.Files.DicomFile.Read(String fullFileName, String[] definitionFilesFullName) at _3disytems.DicomAnonymiserLibrary.DicomImageProcessor.ModifyDicomFile(String filePath) in E:\Projects\Working\Dicom Project\DicomEditorLibrary\DicomImageProcessor.cs:line 63} and Some times {System.Runtime.InteropServices.SEHException: External component has thrown an exception. at ?readMedia@BASE_SESSION_CLASS@@ ... NTENT_TYPE_ENUM@@000_N2@Z(BASE_SESSION_CLASS* , basic_string<char\,std::char_traits<char>\,std::allocator<char> >* , Int32 , basic_string<char\,std::char_traits<char>\,std::allocator<char> >* , basic_string<char\,std::char_traits<char>\,std::allocator<char> >* , basic_string<char\,std::char_traits<char>\,std::allocator<char> >* , Boolean , Boolean ) at Wrappers.MBaseSession.ReadMedia(String pFileName) at Dvtk.Sessions.Session.ReadFile(String mediaFileName) at DvtkHighLevelInterface.Dicom.Files.DicomFile.Read(String fullFileName, ScriptSession dvtkScriptSession) at DvtkHighLevelInterface.Dicom.Files.DicomFile.Read(String fullFileName, String[] definitionFilesFullName) at _3disytems.DicomAnonymiserLibrary.DicomImageProcessor.ModifyDicomFile(String filePath) in E:\Projects\Working\Dicom Project\DicomEditorLibrary\DicomImageProcessor.cs:line 63} These exception not getting for every files, only for large files when I am trying to read them. I am using DVTK Library for Dicom images provided by DVTK. It's open source http://www.dvtk.org Following code ex I am using.. public static void ModifyDicomFile(string filePath) { DicomFile theDicomFile; try { theDicomFile = new DicomFile(); theDicomFile.Read(filePath); if (attrInfo.PatientName == null || attrInfo.PatientName == "" || attrInfo.PatientID == null || attrInfo.PatientID == "" || attrInfo.PatientDOB == null || attrInfo.PatientDOB == "") Logger.Log(dirSettings.LogDirectory, "some information of Patient is missing in App.config"); theDicomFile.DataSet.Set("0x00100010", VR.PN, attrInfo.PatientName); theDicomFile.DataSet.Set("0x00100020", VR.LO, attrInfo.PatientID); theDicomFile.DataSet.Set("0x00100030", VR.DA, attrInfo.PatientDOB); string relPath; if (!filePath.Contains(".dcm")) { relPath = dirSettings.TargetDirectory + filePath.Substring(dirSettings.SourceDirectory.Length) + ".dcm"; } else { relPath = dirSettings.TargetDirectory + filePath.Substring(dirSettings.SourceDirectory.Length); } theDicomFile.Write(relPath); // File.Delete(filePath); } catch (Exception e) { Logger.Log(dirSettings.LogDirectory, "Error: Dicom File Modification : " + e.Message); } } I am want to tell you that this is working for small files(2-5mb) but it giving problem me when I am trying to read 400MB files Please solve this problem. This is .Dot net only Thanks, Manesh
Posted on: 2010/1/15 12:45
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Re: Dicom File metadata modification error |
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Core Team Member
Joined:
2005/9/15 8:27 From Bangalore, INDIA
Group:
Webmasters Registered Users Core Developers Content Owners Posts:
117
Level : 9; EXP : 84
HP : 0 / 221 MP : 39 / 4966 |
Hi Manesh, Pl use same solution as suggested for DicomFile. Create a new object for FileMetaInformation and store the FMI read from file and modify the created FMI instance and then you can store modified FMI while saving/writing the DicomFile. Regards, Piyush
Posted on: 2010/1/18 9:13
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