Creating new DICOM file in memory and exporting.

[anilta]

Hi, I am creating a new DICOM file from JPEG file. Without saving to disk, i am exporting the DICOM memory contents.
In the exported file in server, there is no meta header information and TransferSyntax is Unknown Transfer Syntax.
If i save to DISK, i see all the information.

Step 1: Create new DICOM file object.
-------
DcmFileFormat dfile;
DcmDataset *resultObject = dfile.getDataset();

Step 2: Then, using Image2Dcm, i get the DICOM file pixel data.
------
I2DOutputPlug *outPlug = new I2DOutputPlugSC();
I2DImgSource *inputPlug = new I2DJpegSource();
OFCondition cond = i2d.convert(inputPlug, outPlug, resultObject, writeXfer);

Step 3: Then export,
-------
OFCondition cond = DIMSE_storeUser(assoc, presID, &req,
NULL, resultObject, progressCallback, NULL,
m_blockMode, m_dimseTimeout,
&rsp, &statusDetail, NULL);

Am i missing any step here?

Regards,
Anil TA

[Michael Onken]

Hi Anil,

what's the error?

One possible reason could be that your dataset does not know it's own transfer syntax (based on pixel data); try calling updateOriginalXfer() on the dataset before trying to send it. In img2dcm this is not necessary since we tell saveFile() directly which transfer syntax to use.

Best,
Michael

[anilta]

Thanks Michael. Using updateOriginalXfer() did not solve the problem.

When i transfer in-memory contents, i get the file dump as,
.........................................................................................................................
# Dicom-File-Format

# Dicom-Meta-Information-Header
# Used TransferSyntax: Unknown Transfer Syntax

# Dicom-Data-Set
# Used TransferSyntax: Little Endian Explicit
(0008,0005) CS [ISO_IR 100] # 10, 1 SpecificCharacterSet
(0008,0016) UI =SecondaryCaptureImageStorage # 26, 1 SOPClassUID
.........................................................................................................................

When i save the memory contents to disk as a file,
.........................................................................................................................
# Dicom-Meta-Information-Header
# Used TransferSyntax: Little Endian Explicit
(0002,0000) UL 200 # 4, 1 FileMetaInformationGroupLength
(0002,0001) OB 00\01 # 2, 1 FileMetaInformationVersion
(0002,0002) UI =SecondaryCaptureImageStorage # 26, 1 MediaStorageSOPClassUID
(0002,0003) UI [1.2.276.0.7230010.3.1.4.1205869540.3592.1448037364.764] # 54, 1 MediaStorageSOPInstanceUID
(0002,0010) UI =JPEGBaseline # 22, 1 TransferSyntaxUID
(0002,0012) UI [1.2.276.0.7230010.3.0.3.6.1] # 28, 1 ImplementationClassUID
(0002,0013) SH [OFFIS_DCMTK_361] # 16, 1 ImplementationVersionName

# Dicom-Data-Set
# Used TransferSyntax: JPEG Baseline
(0008,0005) CS [ISO_IR 100] # 10, 1 SpecificCharacterSet
(0008,0016) UI =SecondaryCaptureImageStorage # 26, 1 SOPClassUID
.........................................................................................................................

[anilta]

Hi Michael,

I was testing this scenario using JDicom server. This seems to be a bug in JDicom
I tested in storescp tool, the meta information is generated.

Also, thanks for suggesting me to us updateOriginalXfer() for memory created DICOM file.
I missed this function call in my implementation.

Thanks,
Anil TA
GE Healthcare

[avpai]

Hey can you provide me with the code of the conversion?
I am trying something similar. I have a bmp file that i need to convert to dicom, and I a have a separate dataset stored in the memory to update the tags on the new dicom image.