Read private TAGS from various vendors

[Thanasis Iliopoulos]

Hello Guys,

i am wondering on which is the most efficient way to setup & build a JAVA application (using dcm4che toolkit) for being able to indentify and parse in a proper way DICOMs from various vendors.

For example at the moment i need to parse private tags from MRIs manufactured by Siemens, GE and Philips. I can see that even for the same vendor there are differences in the VR of the same private tags.

At the moment i am trying to parse these private TAGs by using code as the one listed below:

//get acquisitionMatrixX of a DICOM file

public String getAcquisitionMatrixX(File file) throws IOException {

        

        String acquisitionMatrixX =null;

        String manufacturer = null;

        

        CheckIfIsDicom checkFile = new CheckIfIsDicom();

        

        if(checkFile.checkIfDicomObjectFileB(file)) {

            try {

                

                DicomObject dcmObj4;

                DicomInputStream din4 = null;

                din4 = new DicomInputStream(file);

                dcmObj4 = din4.readDicomObject();

                

                manufacturer = dcmObj4.getString(Tag.Manufacturer);

                

                if(manufacturer.contains("GE")) {                    

                    acquisitionMatrixX = dcmObj4.getString(0X00181310, VR.US);

                    log.info("GE machine |acquisitionMatrixX| --------- Value for tag: " + acquisitionMatrixX);

                } else if (manufacturer.contains("SIEMENS")) {

                    //IN CASE OF some models VR.SH & UN

                    acquisitionMatrixX = dcmObj4.getString(0X0051100b, VR.LO);

                    log.info("SIEMENS machine |acquisitionMatrixX| --------- Value for tag: " + acquisitionMatrixX);

                } else if (manufacturer.toLowerCase().contains("PHILIPS".toLowerCase())) {

                    acquisitionMatrixX = dcmObj4.getString(0X00189058, VR.US);

                    log.info("PHILIPS machine |acquisitionMatrixX| --------- Value for tag: " + acquisitionMatrixX);

                } else {

                    acquisitionMatrixX = "";

                }

                

                din4.close(); 

            }

            catch (IOException e) {

                    e.printStackTrace();

            } finally {

                if("".equals(acquisitionMatrixX) || acquisitionMatrixX==null) {

                    acquisitionMatrixX="-100000";

                } else {

                }

            }

        } else {

            log.info("### IS NOT DICOM! ####");

            log.info("Selected file is not a DICOM Object");

        }

        

        return acquisitionMatrixX;

    }

However i do not think that such a way of parsing DICOM tags from different vendors is the most efficient in terms of consistency and maintenance of code/logic!

Does anybody has developed an application with such a requirement? Are there any other ways to try and automate this process (e.g. by using data dictionaries per vendor/model?)

Anybody has some rough propositions or guideliness on that?

Thanks!

[Dimitri Pianeta]

A list tag for philips private here https://github.com/INCF/NeuroimagingMetadata/wiki/PhilipsAchieva2.