private static void CreateSeries(DicomFile file, string seriesInstanceUid, List <DicomSeries> seriesList)
{
var sopclass = file.Dataset.GetValueOrDefault(DicomTag.SOPClassUID, 0, string.Empty);
if (!IsSupportedSopClass(sopclass))
{
logger.LogError($"SOP class not supported: '{sopclass}' ");
return;
}
var series = seriesList.FirstOrDefault(s => s.SeriesInstanceUid == seriesInstanceUid);
if (series == null)
{
var seriesNumber = file.Dataset.GetValueOrDefault(DicomTag.SeriesNumber, 0, string.Empty);
series = new DicomSeries
{
SeriesInstanceUid = seriesInstanceUid,
SopClassUid = sopclass,
Number = seriesNumber
};
seriesList.Add(series);
}
series.FileNames.Add(file.File.Name);
series.Files.Add(file);
}
public static Scan Load(DicomSeries series)
{
try
{
if (series.FileNames.Count == 1)
{
var filePath = series.FileNames.First();
var file = DicomFile.Open(filePath);
return(Load(file));
}
else if (series.FileNames.Count > 1)
{
var files = new List <DicomFile>();
foreach (var fileName in series.FileNames)
{
var file = DicomFile.Open(fileName);
files.Add(file);
}
return(Load(files));
}
}
catch (Exception e)
{
logger.LogWarning(e, $"Could not load dataset '{e.Message}' {e.StackTrace}");
}
return(null);
}
private static void GenerateThumbnail(DicomSeries series)
{
for (int i = series.FileNames.Count / 2; i >= 0; i--)
{
var middleFileName = series.FileNames[i];
var middleFile = DicomFile.Open(middleFileName);
if (middleFile.Dataset.Contains(DicomTag.PixelData))
{
DicomImage image = new DicomImage(middleFile.Dataset);
image.Scale = 0.25;
var frame = image.NumberOfFrames / 2;
var renderedImage = image.RenderImage(frame);
series.Thumbnail = renderedImage.AsWriteableBitmap();
break;
}
}
}
public static IEnumerable <Series> ExtractSeriesFromDicomDir(string path, bool generateMissingThumbnails)
{
var result = new List <DicomSeries>();
if (!DicomFile.HasValidHeader(path))
{
return(result);
}
try
{
var dicomDirectory = DicomDirectory.Open(path);
foreach (var patientRecord in dicomDirectory.RootDirectoryRecordCollection)
{
foreach (var studyRecord in patientRecord.LowerLevelDirectoryRecordCollection)
{
foreach (var seriesRecord in studyRecord.LowerLevelDirectoryRecordCollection)
{
var seriesRecordType = seriesRecord.GetSingleValueOrDefault(DicomTag.DirectoryRecordType, string.Empty);
if (seriesRecordType != "SERIES")
{
continue;
}
var series = new DicomSeries
{
SeriesInstanceUid = seriesRecord.GetSingleValueOrDefault(DicomTag.SeriesInstanceUID, ""),
Number = seriesRecord.GetSingleValueOrDefault(DicomTag.SeriesNumber, ""),
};
DicomSequence iconImageSequence;
if (seriesRecord.TryGetSequence(DicomTag.IconImageSequence, out iconImageSequence))
{
var iconImage = iconImageSequence.FirstOrDefault();
if (iconImage != null)
{
DicomImage image = new DicomImage(iconImage);
series.Thumbnail = image.RenderImage().AsWriteableBitmap();
}
}
foreach (var imageRecord in seriesRecord.LowerLevelDirectoryRecordCollection)
{
var imageRecordType = imageRecord.GetSingleValueOrDefault(DicomTag.DirectoryRecordType, string.Empty);
if (imageRecordType != "IMAGE")
{
continue;
}
var values = imageRecord.GetValues <string>(DicomTag.ReferencedFileID);
var relativePath = string.Join(@"\", values);
series.SopClassUid = imageRecord.GetSingleValueOrDefault(DicomTag.ReferencedSOPClassUIDInFile, "");
series.NumberOfImages += Math.Max(1, imageRecord.GetSingleValueOrDefault(DicomTag.NumberOfFrames, 1));
var absolutePath = Path.GetDirectoryName(path) + @"\\" + relativePath;
series.FileNames.Add(absolutePath);
}
if (generateMissingThumbnails && series.Thumbnail == null && series.FileNames.Count > 0)
{
GenerateThumbnail(series);
}
if (series.NumberOfImages > 0)
{
result.Add(series);
}
}
}
}
}
catch (Exception e)
{
logger.LogWarning(e, $"Could not read DICOMDIR file '{e.Message}' {e.StackTrace}");
}
return(result);
}
