java - Dcm4Che - 从 pacs 获取图像

Question

我遇到了以下问题。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。我写了以下代码: 公共(public)课 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");
}
}

一切似乎都很好，直到我调用 dcmTools.toByteArray(dco)。调用 toByteArray() 之前的输出如下所示:

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 后我得到了输出:

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

我在其他论坛上找到了一些信息，似乎 DcmQR.get() 方法不发送图像数据。是否可以强制 DcmQR 执行此操作。我已经写过问题出在 DcmQR.createStorageService() 方法中或与方法有关，但我还没有找到解决方案。请帮助我!!!

您好!

我已经按照您的建议进行了一些更改:我添加了 setMoveDest 和 setStoreDestination，并且 DicomObject 存储在我添加的目标中 - 看起来很棒。然后我尝试基于 Association.cget 方法中使用的 FutureDimseRSP 编写响应处理程序:

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;
}
}

这是 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;
}
}

然后我重新输入了 Dmcqr 的 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();
}

在此方法的第二个参数中，我使用了响应处理程序 (MyDimseRSP) 的实例。然后我运行我的代码，我得到了我的响应处理程序的命令和数据集的空值。在“下一个”变量中，只有“命令”不为空，当然它不是我需要的 DicomObject。我做错了什么!!!!

Answer 1

您将不得不逐步执行代码(包括 DCM4CHE 工具包代码)。我怀疑您使用的是默认响应处理程序，它只计算已完成操作的数量，实际上并不存储来自 get 命令的图像数据。

很明显，下面的 for 循环正在循环查找操作的结果，而不是 get(需要在响应处理程序中处理)。

for(DicomObject dco:result)

我希望您必须覆盖响应处理程序才能正确编写您的 DICOM 文件。另请参阅 DcmRcv 类，用于从您将收到的 DicomObject 写入 DICOM 文件。

:

根据您上面的编辑，我假设您只是想获取原始 DICOM 实例数据(而不是存储它的命令)。响应处理程序大致如下:

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

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

当心大列表，但它应该让您获得内存中的数据。