private void RestoreExistingInstances(InferenceRequest inferenceRequest, Dictionary <string, InstanceStorageInfo> retrievedInstances)
{
Guard.Against.Null(inferenceRequest, nameof(inferenceRequest));
Guard.Against.Null(retrievedInstances, nameof(retrievedInstances));
_logger.Log(LogLevel.Debug, $"Restoring previously retrieved DICOM instances from {inferenceRequest.StoragePath}");
foreach (var file in _fileSystem.Directory.EnumerateFiles(inferenceRequest.StoragePath, "*.dcm", System.IO.SearchOption.AllDirectories))
{
if (_dicomToolkit.HasValidHeader(file))
{
var dicomFile = _dicomToolkit.Open(file);
var instance = InstanceStorageInfo.CreateInstanceStorageInfo(dicomFile, inferenceRequest.StoragePath, _fileSystem);
if (retrievedInstances.ContainsKey(instance.SopInstanceUid))
{
continue;
}
retrievedInstances.Add(instance.SopInstanceUid, instance);
_logger.Log(LogLevel.Debug, $"Restored previously retrieved instance {instance.SopInstanceUid}");
}
else
{
_logger.Log(LogLevel.Warning, $"Unable to restore previously retrieved instance from {file}; file does not contain valid DICOM header.");
}
}
}
private Dictionary <DicomTag, HashSet <string> > ExtractValues(List <DicomTag> dicomTagsToExtract, IReadOnlyList <string> files)
{
Guard.Against.Null(dicomTagsToExtract, nameof(dicomTagsToExtract));
Guard.Against.Null(files, nameof(files));
var bags = new Dictionary <DicomTag, HashSet <string> >();
foreach (var dicomTag in dicomTagsToExtract)
{
if (!bags.ContainsKey(dicomTag))
{
bags.Add(dicomTag, new HashSet <string>());
}
}
foreach (var file in files)
{
DicomFile dicomFile = null;
try
{
if (!_dicomToolkit.HasValidHeader(file))
{
continue;
}
dicomFile = _dicomToolkit.Open(file);
}
catch (Exception ex)
{
_logger.Log(LogLevel.Debug, ex, $"Error opening file {file}.");
continue;
}
foreach (var dicomTag in dicomTagsToExtract)
{
try
{
if (_dicomToolkit.TryGetString(dicomFile, dicomTag, out var value) &&
!string.IsNullOrWhiteSpace(value))
{
bags[dicomTag].Add(value.Substring(0, Math.Min(value.Length, VALUE_LENGTH_LIMIT)));
}
}
catch (Exception ex)
{
_logger.Log(LogLevel.Error, ex, $"Error extracting metadata from file {file}, DICOM tag {dicomTag}.");
}
}
}
return(bags);
}
