从JAVA程序使用dcm4chee连接到dcm4che

Question

更新

我在dcm4che的源代码中进行了更深入的研究，发现如果

• 连接是“未安装”。
• 或者协议的类型没有设置或不匹配。

我不知道“已安装”连接意味着什么，但可以手动设置此标志，因此我将其设置为指向true的本地和远程连接(甚至用getInstalled()检查它们是否“安装”--是的--以前该属性是null)。

至于协议，它们没有被指定，所以对于这两个连接，我将它们设置为DICOM。

结果:我仍然得到同样的例外。

我想使用dcm4chee (5.12.0)工具包在dcm4che (2.18.3)和我的JAVA应用程序之间建立一个DICOM关联。

问题是，似乎没有任何关于如何在JAVA应用程序中使用dcm4che的文档，所以我所能做的就是阅读dcm4che的源代码，并试图弄清楚它的类和方法是用来做什么的，但是我被困住了。如果有人已经有一个工作的例子，这将是非常有帮助的。

到目前为止，我已经：

import org.dcm4che3.net.ApplicationEntity;
import org.dcm4che3.net.Association;
import org.dcm4che3.net.Connection;
import org.dcm4che3.net.Device;
import org.dcm4che3.net.pdu.AAssociateRQ;
import org.dcm4che3.net.pdu.PresentationContext;

...

ApplicationEntity locAE = new ApplicationEntity();
locAE.setAETitle("THIS_JAVA_APP");

Connection localConn = new Connection();
localConn.setCommonName("loc_conn");
localConn.setHostname("localhost");
localConn.setPort(11112);
localConn.setProtocol(Connection.Protocol.DICOM);
localConn.setInstalled(true);
locAE.addConnection(localConn);

ApplicationEntity remAE = new ApplicationEntity();
remAE.setAETitle("DCM4CHEE");

Connection remoteConn = new Connection();
remoteConn.setCommonName("rem_conn");
remoteConn.setHostname("localhost");
remoteConn.setPort(11112);
remoteConn.setProtocol(Connection.Protocol.DICOM);
remoteConn.setInstalled(true);
remAE.addConnection(remoteConn);

AAssociateRQ assocReq = new AAssociateRQ();
assocReq.setCalledAET(remAE.getAETitle());
assocReq.setCallingAET(locAE.getAETitle());
assocReq.setApplicationContext("1.2.840.10008.3.1.1.1");
assocReq.setImplClassUID("1.2.40.0.13.1.3");
assocReq.setImplVersionName("dcm4che-5.12.0");
assocReq.setMaxPDULength(16384);
assocReq.setMaxOpsInvoked(0);
assocReq.setMaxOpsPerformed(0);
assocReq.addPresentationContext(new PresentationContext(
    1, "1.2.840.10008.1.1", "1.2.840.10008.1.2"));

Device device = new Device("device");
device.addConnection(localConn);
device.addApplicationEntity(locAE);

Association assoc = locAE.connect(remAE, assocReq);

但我不知道我是否走上了正确的道路。

我所犯的错误：

org.dcm4che3.net.IncompatibleConnectionException: No compatible connection to DCM4CHEE available on THIS_JAVA_APP
at org.dcm4che3.net.ApplicationEntity.findCompatibelConnection(ApplicationEntity.java:646)
at org.dcm4che3.net.ApplicationEntity.connect(ApplicationEntity.java:651)

Answer 1

这是工作代码：(我不知道这是否是最小的解决方案，请随意试用.)

ApplicationEntity locAE = new ApplicationEntity();
locAE.setAETitle("THIS_JAVA_APP");
locAE.setInstalled(true);

Connection localConn = new Connection();
localConn.setCommonName("loc_conn");
localConn.setHostname("localhost");
localConn.setPort(11112);
localConn.setProtocol(Connection.Protocol.DICOM);
localConn.setInstalled(true);
locAE.addConnection(localConn);

ApplicationEntity remAE = new ApplicationEntity();
remAE.setAETitle("DCM4CHEE");
remAE.setInstalled(true);

Connection remoteConn = new Connection();
remoteConn.setCommonName("rem_conn");
remoteConn.setHostname("localhost");
remoteConn.setPort(11112);
remoteConn.setProtocol(Connection.Protocol.DICOM);
remoteConn.setInstalled(true);
remAE.addConnection(remoteConn);

AAssociateRQ assocReq = new AAssociateRQ();
assocReq.setCalledAET(remAE.getAETitle());
assocReq.setCallingAET(locAE.getAETitle());
assocReq.setApplicationContext("1.2.840.10008.3.1.1.1");
assocReq.setImplClassUID("1.2.40.0.13.1.3");
assocReq.setImplVersionName("dcm4che-5.12.0");
assocReq.setMaxPDULength(16384);
assocReq.setMaxOpsInvoked(0);
assocReq.setMaxOpsPerformed(0);
assocReq.addPresentationContext(new PresentationContext(
    1, "1.2.840.10008.1.1", "1.2.840.10008.1.2"));

Device device = new Device("device");
device.addConnection(localConn);
device.addApplicationEntity(locAE);

Executor exec = (Runnable command) -> {};
device.setExecutor(exec);

Association assoc = locAE.connect(localConn, remoteConn, assocReq);

以及相关的dcm4chee日志：

2018-03-02 23:21:42,832 INFO  THIS_JAVA_APP->DCM4CHEE (TCPServer-1) [org.dcm4cheri.net.FsmImpl] received AAssociateRQ
    appCtxName: 1.2.840.10008.3.1.1.1/DICOM Application Context Name
    implClass:  1.2.40.0.13.1.3
    implVersion:    dcm4che-5.12.0
    calledAET:  DCM4CHEE
    callingAET: THIS_JAVA_APP
    maxPDULen:  16378
    asyncOpsWindow: 
    pc-1:   as=1.2.840.10008.1.1/Verification SOP Class
        ts=1.2.840.10008.1.2/Implicit VR Little Endian
2018-03-02 23:21:42,843 INFO  THIS_JAVA_APP->DCM4CHEE (TCPServer-1) [org.dcm4cheri.net.FsmImpl] sending AAssociateAC
    appCtxName: 1.2.840.10008.3.1.1.1/DICOM Application Context Name
    implClass:  1.2.40.0.13.1.1.1
    implVersion:    dcm4che-1.4.34
    calledAET:  DCM4CHEE
    callingAET: THIS_JAVA_APP
    maxPDULen:  16352
    asyncOpsWindow: 
    pc-1:   0 - acceptance
        ts=1.2.840.10008.1.2/Implicit VR Little Endian

在您有了关联之后，请看另一篇文章用于如何执行一个C-查找。

Answer 2

可能是，您在安装过程中缺少了一个Device实例？看起来，您需要一个Device，它同时附加了ApplicationEntity和Connection。

从FindSCU.java源查看dcm4che源。

private final Device device = new Device("findscu");
private final ApplicationEntity ae = new ApplicationEntity("FINDSCU");
private final Connection conn = new Connection();

public FindSCU() throws IOException {
    device.addConnection(conn);
    device.addApplicationEntity(ae);
    ae.addConnection(conn);
}

我还认为，可能可以在没有任何参数的情况下实例化本地Connection对象，如这里的FindSCU示例所示。也许参数在某种程度上混淆了它，特别是考虑到您有指向localhost:11112的本地和远程连接。

但是，是的，我们必须承认，dcm4che3 API的文档是完全不够的。

Answer 3

编辑

显然，我解决了这个问题。将遗嘱执行人改为

Executor exec = (Runnable command) -> {};
device.setExecutor(exec);

至

ExecutorService executorService = Executors.newSingleThreadExecutor();
ScheduledExecutorService scheduledExecutorService = Executors.newSingleThreadScheduledExecutor();
device.setExecutor(executorService);
device.setScheduledExecutor(scheduledExecutorService);

因此，我的应用程序正确地接收了来自服务器的关联响应。这可能会为其他人提供参考。

谢谢你分享你的代码。这对我真的很有帮助。

原始邮政

我无法使用与您建议的解决方案类似的代码来执行连接。我试图请求一个与dcm4che (都为5.14.1)的dcm4chee-弧光灯相关联，我有如下所示：

Device device = new Device(deviceName);
ApplicationEntity locAE = new ApplicationEntity(localAE);
Connection conn = new Connection();
Connection remote = new Connection();
AAssociateRQ rq = new AAssociateRQ();

device.addConnection(conn);
device.addApplicationEntity(locAE);
locAE.addConnection(conn);

ApplicationEntity remAE = new ApplicationEntity();
remAE.setAETitle(remoteAE);

remote.setCommonName("rem_conn");
remote.setHostname(remoteIP);
remote.setPort(remotePort);
remote.setProtocol(Connection.Protocol.DICOM);
remAE.addConnection(remote);

rq.setCalledAET(remAE.getAETitle());
rq.setCallingAET(locAE.getAETitle());
rq.setApplicationContext("1.2.840.10008.3.1.1.1");
rq.setImplClassUID("1.2.40.0.13.1.3");
rq.setImplVersionName("dcm4che-5.14.1");
rq.setMaxPDULength(16384);
rq.setMaxOpsInvoked(0);
rq.setMaxOpsPerformed(0);
rq.addPresentationContext(new PresentationContext(
        1, "1.2.840.10008.5.1.4.1.2.2.1", "1.2.840.10008.1.2"));

Executor exec = (Runnable command) -> {};
device.setExecutor(exec);

//Opens association and connects to remote server
Association as = locAE.connect(conn, remote, rq);

但是，当试图连接到远程AET时，它似乎没有接收到来自远程AET的AAssociation响应。我的Java应用程序挂在Sta5 (等待关联响应)中，而服务器挂在Sta6 (准备进行数据传输)中。

Java日志：

[main] INFO org.dcm4che3.net.Connection  - Initiate connection from 0.0.0.0/0.0.0.0:0 to localhost:11112
[main] INFO org.dcm4che3.net.Connection  - Established connection Socket[addr=localhost/127.0.0.1,port=11112,localport=50101]
[main] DEBUG org.dcm4che3.net.Association  - /127.0.0.1:50101>localhost/127.0.0.1:11112(1): enter state: Sta4 - Awaiting transport connection opening to complete
[main] INFO org.dcm4che3.net.Association  - DEVICEAE->DCMQRSCP(1) << A-ASSOCIATE-RQ
[main] DEBUG org.dcm4che3.net.Association  - A-ASSOCIATE-RQ[
  calledAET: DCMQRSCP
  callingAET: DEVICEAE
  applicationContext: 1.2.840.10008.3.1.1.1 - DICOM Application Context Name
  implClassUID: 1.2.40.0.13.1.3
  implVersionName: dcm4che-5.14.1
  maxPDULength: 16378
  maxOpsInvoked/maxOpsPerformed: 1/1
  PresentationContext[id: 1
  as: 1.2.840.10008.5.1.4.1.2.2.1 - Study Root Query/Retrieve Information Model - FIND
  ts: 1.2.840.10008.1.2 - Implicit VR Little Endian
 ]
]
[main] DEBUG org.dcm4che3.net.Association  - DEVICEAE->DCMQRSCP(1): enter state: Sta5 - Awaiting A-ASSOCIATE-AC or A-ASSOCIATE-RJ PDU

服务器日志：

19:11:29,397 INFO  - Accept connection Socket[addr=/127.0.0.1,port=50101,localport=11112]
19:11:29,397 DEBUG - /127.0.0.1:11112<-/127.0.0.1:50101(3): enter state: Sta2 - Transport connection open
19:11:29,416 INFO  - DCMQRSCP<-DEVICEAE(3) >> A-ASSOCIATE-RQ
19:11:29,416 DEBUG - A-ASSOCIATE-RQ[
 calledAET: DCMQRSCP
 callingAET: DEVICEAE
 applicationContext: 1.2.840.10008.3.1.1.1 - DICOM Application Context Name
 implClassUID: 1.2.40.0.13.1.3
 implVersionName: dcm4che-5.14.1
 maxPDULength: 16378
 maxOpsInvoked/maxOpsPerformed: 1/1
 PresentationContext[id: 1
 as: 1.2.840.10008.5.1.4.1.2.2.1 - Study Root Query/Retrieve Information Model - FIND
 ts: 1.2.840.10008.1.2 - Implicit VR Little Endian
  ]
 ]
19:11:29,419 DEBUG - DCMQRSCP<-DEVICEAE(3): enter state: Sta3 - Awaiting local A-ASSOCIATE response primitive
19:11:29,419 INFO  - DCMQRSCP<-DEVICEAE(3) << A-ASSOCIATE-AC
19:11:29,419 DEBUG - A-ASSOCIATE-AC[
 calledAET: DCMQRSCP
 callingAET: DEVICEAE
 applicationContext: 1.2.840.10008.3.1.1.1 - DICOM Application Context Name
 implClassUID: 1.2.40.0.13.1.3
 implVersionName: dcm4che-5.14.1
 maxPDULength: 16378
 maxOpsInvoked/maxOpsPerformed: 1/1
 PresentationContext[id: 1
 result: 0 - acceptance
 ts: 1.2.840.10008.1.2 - Implicit VR Little Endian
  ]
 ]
19:11:29,427 DEBUG - DCMQRSCP<-DEVICEAE(3): enter state: Sta6 - Association established and ready for data transfer

我觉得我错过了什么，但我找不到问题的根源。任何帮助都是非常感谢的，因为我仍然是dcm4che和DICOM协议的新手。

谢谢。