storing DICOM object as byte[]

[norbi771]

Hi,

I am trying to save DICOM object directly to database instead of saving it to file.

Could you help me with this as I am getting some weird results.

Based on some code found in Weasis DICOM API in GetSCU I found the following code

    private void storeTo(Association as, Attributes fmi, PDVInputStream data, File file) throws IOException {

        LOG.info("{}: M-WRITE {}", as, file);

        file.getParentFile().mkdirs();

        DicomOutputStream out = new DicomOutputStream(file);

        try {

            out.writeFileMetaInformation(fmi);

            data.copyTo(out);

        } finally {

            SafeClose.close(out);

        }

    }

So I am trying to adjust it to my needs.

I can store byte[] to database so for tests I am temporaryly trying to get byte[] data from DICOM and save this data to file. 

When this is working fine I will further adjust function to work with DB

private void storeTo(Association as, Attributes fmi, PDVInputStream data, File file) throws IOException {

    ByteArrayOutputStream out = new ByteArrayOutputStream();

    String transferSyntaxUID = fmi.getString(Tag.TransferSyntaxUID);

    String sOPInstanceUID = fmi.getString(Tag.MediaStorageSOPInstanceUID);

    data.copyTo(out);

    

    DicomOutputStream dos = new DicomOutputStream(new BufferedOutputStream(out), transferSyntaxUID);

//    DicomOutputStream dos = new DicomOutputStream(new BufferedOutputStream(out), UID.ExplicitVRLittleEndian);

    dos.writeFileMetaInformation(fmi);

    data.copyTo(dos);

    

        Path path = Paths.get("c:\\temp\\" + sOPInstanceUID + ".dcm");

        try {

          Files.write(path, out.toByteArray()); //creates, overwrites

        } catch (IOException ex) {

          System.out.println("exception");

        }

    SafeClose.close(dos);      

      

      

    }

If I run the above the received file is smaller then ones I get from the original function.

If I compare tags seen in Microdicom the resulting file doesn't have 0002* tags. 

And I am confused ....

Could you advice is that the proper way of saving dicom data to byte[] or should I do it in a different way

I will appreciate your comments.

[Dimitri Pianeta]

I enclose a small program for change pixel data with helping dcm4che3.