/// <summary>
/// Scans for the given tag in the di file
/// </summary>
/// <param name="searchTag">tag id to look for</param>
/// <returns></returns>
public DiDataElement Scan_for(uint searchTag)
{
var de = new DiDataElement();
var exceptionOccured = false;
var inSequence = false;
uint searchGroupId = (searchTag >> 16);
do
{
try
{
de.ReadNext(this);
if (de.GetGroupId() < searchGroupId && de.GetElementId() == 0)
{
Seek(de.GetInt(), SeekOrigin.Current);
}
}
catch (Exception ex) {
Debug.Log("DiFileInputStream::get_quick_info failed:" + ex);
exceptionOccured = true;
}
if (searchTag == de.GetTag())
{
return(de);
}
} while (!exceptionOccured && (inSequence || de.GetTag() < 0x00200013));
return(null);
}
/// <summary>
/// Fills a QuickInfo objects and skips all information that is not necessary.
/// </summary>
/// <returns></returns>
public QuickInfo Get_quick_info()
{
var de = new DiDataElement();
var qi = new QuickInfo();
VrFormat = DiFile.VrExplicit;
Endianess = DiFile.EndianLittle;
// // media stored sop
// de = scan_for(0x00020002);
// if (de!=null) {
// qi._media_stored_sop_class_uid = de.get_value_as_string();
// } else {
// return null;
// }
// transfer syntax
de = Scan_for(0x00020010);
if (de != null)
{
var tsUid = de.GetValueAsString();
VrFormat = DiDictonary.get_ts_uid_vr_format(tsUid);
Endianess = DiDictonary.get_ts_uid_endianess(tsUid);
if (VrFormat == DiFile.EndianUnknown)
{
Debug.Log("DiFileInputStream::get_quick_info Warning: Unknown Transfer Syntax UID \"" + tsUid + "\". Endianess & VR format will be guessed.");
}
}
// image type
de = Scan_for(0x00080008);
if (de != null)
{
var imageType = de.GetValueAsString();
var split = imageType.Split(new [] { "\\\\" }, StringSplitOptions.None);
if (split.Length > 2 && split[2].Equals("SCOUT"))
{
qi.Scout = true;
}
else
{
qi.Scout = false;
}
}
// series uid
de = Scan_for(0x0020000e);
if (de != null)
{
qi.SeriesUid = de.GetValueAsString();
}
else
{
return(null);
}
// image number
de = Scan_for(0x00200013);
qi.ImageNumber = de?.GetInt() ?? 0;
return(qi);
}
/// <summary>
/// Initializes the DiFile from a file. Might throw an exception (unexpected
/// end of file, wrong data etc).
/// </summary>
/// <param name="fileName">file_name a string containing the name of a valid dicom file</param>
public void InitFromFile(string fileName)
{
_fileName = fileName;
var file = new DiFileStream(_fileName);
if (!file.SkipHeader())
{
return;
}
DiDataElement deOld = null, diDataElement;
var i = 0;
// read rest
do
{
diDataElement = new DiDataElement();
diDataElement.ReadNext(file);
// System.out.println(de);
// byte_sum += de._vl;
if (diDataElement.GetTag() == 0xfffee000)
{
// handle sequences ...
var seq = new Dictionary <uint, DiDataElement>();
var seqDe = new DiDataElement();
while (seqDe.GetTag() != 0xfffee0dd)
{
seqDe = new DiDataElement();
seqDe.ReadNext(file);
seq[seqDe.GetTag()] = seqDe;
}
_sequences[deOld.GetTag()] = seq;
}
else if (diDataElement.GetTag() == 0x7fe00010 && diDataElement.GetVl() == 0)
{
// encapsulated pixel format
var seq = new Dictionary <uint, DiDataElement>();
var seqDe = new DiDataElement();
var pixelDataDe = diDataElement;
var count = 0;
while (seqDe.GetTag() != 0xfffee0dd)
{
Debug.Log(count + " -> " + seqDe);
seqDe = new DiDataElement();
seqDe.ReadNext(file);
if (seqDe.GetVl() > 4)
{
pixelDataDe = seqDe;
}
seq[seqDe.GetTag()] = seqDe;
count++;
}
_dataElements[diDataElement.GetTag()] = pixelDataDe;
}
else
{
// handle all but sequences
_dataElements[diDataElement.GetTag()] = diDataElement;
}
i++;
deOld = diDataElement;
} while (diDataElement.GetTag() != 0x07fe0010 && file.CanRead && file.Position < file.Length);
file.Close();
// image number
if (_dataElements.TryGetValue(0x00200013, out diDataElement))
{
_imageNumber = diDataElement.GetInt();
}
// image height
if (_dataElements.TryGetValue(0x00280010, out diDataElement))
{
_height = diDataElement.GetInt();
}
// image width
if (_dataElements.TryGetValue(0x00280011, out diDataElement))
{
_width = diDataElement.GetInt();
}
// Bits/Pixel allocated
if (_dataElements.TryGetValue(0x00280100, out diDataElement))
{
_bitsAllocated = diDataElement.GetInt();
}
// Bits/Pixel stored
if (_dataElements.TryGetValue(0x00280101, out diDataElement))
{
_bitsStored = diDataElement.GetInt();
}
// high bit
if (_dataElements.TryGetValue(0x00280102, out diDataElement))
{
_highBit = diDataElement.GetInt();
}
}