Dcm4Che -从pacs获取图像

Question

我有跟踪问题。我必须编写连接到pacs并获取图像的小型应用程序。我决定使用dcm4che工具包。我编写了以下代码: public class Dcm4 {

/**
 * @param args the command line arguments
 */
public static void main(String[] args) {
    // TODO code application logic here
    DcmQR dcmqr = new MyDcmQR("server");

    dcmqr.setCalledAET("server", true);
    dcmqr.setRemoteHost("213.165.94.158");
    dcmqr.setRemotePort(104);
    dcmqr.getKeys();

    dcmqr.setDateTimeMatching(true);
    dcmqr.setCFind(true);
    dcmqr.setCGet(true);

    dcmqr.setQueryLevel(MyDcmQR.QueryRetrieveLevel.IMAGE);

    dcmqr.addMatchingKey(Tag.toTagPath("PatientID"),"2011");
    dcmqr.addMatchingKey(Tag.toTagPath("StudyInstanceUID"),"1.2.276.0.7230010.3.1.2.669896852.2528.1325171276.917");
    dcmqr.addMatchingKey(Tag.toTagPath("SeriesInstanceUID"),"1.2.276.0.7230010.3.1.3.669896852.2528.1325171276.916");


    dcmqr.configureTransferCapability(true);
    List<DicomObject> result=null;
    byte[] imgTab=null;
    BufferedImage bImage=null;
    try {
        dcmqr.start();
        System.out.println("started");
        dcmqr.open();
        System.out.println("opened");
        result = dcmqr.query();
        System.out.println("queried");
        dcmqr.get(result);
        System.out.println("List Size = " + result.size());

        for(DicomObject dco:result){
            System.out.println(dco);
            dcmTools.toByteArray(dco);
            System.out.println("end parsing");
        }

    } catch (Exception e) {
        System.out.println("error "+e);
    }

    try{
        dcmqr.stop();
        dcmqr.close();
    }catch (Exception e) {

    }

    System.out.println("done");
}
}

在我调用dcmTools.toByteArray(dco)之前，一切似乎都很好。输出直到卡住toByteArray()如下：

List Size = 1
(0008,0052) CS #6 [IMAGE] Query/Retrieve Level
(0008,0054) AE #6 [server] Retrieve AE Title
(0020,000E) UI #54 [1.2.276.0.7230010.3.1.3.669896852.2528.1325171276.916] Series Instance UID

ToByteArray的来源：

public static byte[] toByteArray(DicomObject obj) throws IOException {
    ByteArrayOutputStream baos = new ByteArrayOutputStream();
    BufferedOutputStream bos = new BufferedOutputStream(baos);
    DicomOutputStream dos = new DicomOutputStream(bos);
    dos.writeDicomFile(obj);
    dos.close();
    byte[] data = baos.toByteArray();
    return data;
}

调用toByteArray之后，我得到了输出：

error java.lang.IllegalArgumentException: Missing (0002,0010) Transfer Syntax UID

我在其他论坛上发现了一些信息，而且DcmQR.get()方法似乎没有发送加密数据。有可能强迫DcmQR去做吗。我已经编写了这个问题在DcmQR.createStorageService()方法中或在其中，但是我还没有找到解决方案。请帮帮我！

你好，cneller！

我做了一些您建议的更改:我添加了setMoveDest，setStoreDestination和DicomObject存储在我添加的目的地--看起来很棒。然后，我尝试编写基于FutureDimseRSP的响应处理程序，该处理程序用于Association.cget方法：

public class MyDimseRSP extends DimseRSPHandler implements DimseRSP{

private MyEntry entry = new MyEntry(null, null);

private boolean finished;
private int autoCancel;
private IOException ex;

@Override
public synchronized void onDimseRSP(Association as, DicomObject cmd,
                                    DicomObject data) {
    super.onDimseRSP(as, cmd, data);
    MyEntry last = entry;
    while (last.next != null)
        last = last.next;

    last.next = new MyEntry(cmd, data);
    if (CommandUtils.isPending(cmd)) {
        if (autoCancel > 0 && --autoCancel == 0)
            try {
                super.cancel(as);
            } catch (IOException e) {
                ex = e;
            }
    } else {
        finished = true;
    }
    notifyAll();
}

@Override
public synchronized void onClosed(Association as) {
    if (!finished) {
//            ex = as.getException();
        ex = null;
        if (ex == null) {
            ex = new IOException("Association to " + as.getRemoteAET()
                    + " closed before receive of outstanding DIMSE RSP");
        }
        notifyAll();
    }
}

public final void setAutoCancel(int autoCancel) {
    this.autoCancel = autoCancel;
}

@Override
public void cancel(Association a) throws IOException {
    if (ex != null)
        throw ex;
    if (!finished)
        super.cancel(a);
}

public DicomObject getDataset() {
    return entry.command;
}

public DicomObject getCommand() {
    return entry.dataset;
}

public MyEntry getEntry() {
    return entry;
}

public synchronized boolean next() throws IOException, InterruptedException {
    if (entry.next == null) {
        if (finished)
            return false;

        while (entry.next == null && ex == null)
            wait();

        if (ex != null)
            throw ex;
    }
    entry = entry.next;
    return true;
}
}

以下是MyEntry代码：

public class MyEntry {

final DicomObject command;
final DicomObject dataset;
MyEntry next;

public MyEntry(DicomObject command, DicomObject dataset) {
    this.command = command;
    this.dataset = dataset;
}

public DicomObject getCommand() {
    return command;
}

public DicomObject getDataset() {
    return dataset;
}

public MyEntry getNext() {
    return next;
}

public void setNext(MyEntry next) {
    this.next = next;
}
}

然后我从Dmcqr重新输入了get方法，如下所示：

public void getObject(DicomObject obj, DimseRSPHandler rspHandler)throws IOException, InterruptedException{
    TransferCapability tc = selectTransferCapability(qrlevel.getGetClassUids());
    MyDimseRSP myRsp=new MyDimseRSP();
    if (tc == null)
        throw new NoPresentationContextException(UIDDictionary
                .getDictionary().prompt(qrlevel.getGetClassUids()[0])
                + " not supported by " + remoteAE.getAETitle());
    String cuid = tc.getSopClass();
    String tsuid = selectTransferSyntax(tc);
    DicomObject key = obj.subSet(MOVE_KEYS);
    assoc.cget(cuid, priority, key, tsuid, rspHandler);
    assoc.waitForDimseRSP();
}

在该方法的第二个参数中，我使用了响应处理程序(MyDimseRSP)的一个实例。我运行我的代码，我得到了我的响应处理程序的命令和数据集的空值。在"next“变量中，只有”命令“不是null，当然，我需要的不是DicomObject。我做错了什么！

Answer 1

您必须稍微了解一下代码(包括DCM4CHE工具包代码)。我怀疑您使用的是默认的响应处理程序，它只计算已完成的操作数，而不实际存储get命令中的图像数据。

显然，下面的for循环循环遍历的是find操作的结果，而不是get (需要在响应处理程序中处理)。

for(DicomObject dco:result)

我希望您必须重写响应处理程序，以便适当地编写DICOM文件。还请参阅DcmRcv类，以便从您将收到的DicomObject中写入DICOM文件。

从上面的编辑中，我假设您只是尝试获取原始的DICOM实例数据(而不是存储它的命令)。如何处理响应处理程序，大致类似：

List<DicomObject> dataList = new ArrayList<DicomObject>();

@Override
public void onDimseRSP(Association as, DicomObject cmd, DicomObject data) {
    if( shouldAdd(as, cmd) ) {
        dataList.add( data )
    }
}

注意大列表，但它应该会将数据存储在内存中。