Connecting to dcm4chee using dcm4che from a JAVA program

[Tamás Sipos]

I'd like to establish a DICOM association between dcm4chee (2.18.3) and my JAVA application using the dcm4che (5.12.0) toolkit.

The problem is that it doesn't seem to be any documentation available on how to use dcm4che in a JAVA application, so all I can do is read dcm4che's source code and try to figure out what its classes and methods are for, but I'm stuck. If someone already has a working example it would be very helpful.

So far I have:

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);

but I don't know whether I'm on the right path doing it.

The error I get:

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)

(To be honest, I have no idea what a Device is and why it is necessary, and what I should do with it, but I found an older implementation for an association in which a Device is used.)

And the parameters that I added to the request are from other forum topics I found (this and this).

[Jon Ander Zuccaro]

You have some working examples already, take a look at the "tools" folder:

https://github.com/dcm4che/dcm4che/tree/master/dcm4che-tool

On Thursday, March 1, 2018 at 10:53:14 AM UTC-4, Tamás Sipos wrote:

I'd like to establish a DICOM association between dcm4chee (2.18.3) and my JAVA application using the dcm4che (5.12.0) toolkit.

The problem is that it doesn't seem to be any documentation available on how to use dcm4che in a JAVA application, so all I can do is read dcm4che's source code and try to figure out what its classes and methods are for, but I'm stuck. If someone already has a working example it would be very helpful.

So far I have:

import org.dcm4che3.net.ApplicationEntity;
import org.dcm4che3.net.Connection;

import org.dcm4che3.net.pdu.AAssociateRQ;
import org.dcm4che3.net.pdu.PresentationContext;

...

ApplicationEntity locAE = new ApplicationEntity("THIS_JAVA_APP");
Connection localConn = new Connection("loc_conn", "localhost", 11112);
locAE.addConnection(localConn);

ApplicationEntity remAE = new ApplicationEntity("DCM4CHEE");
Connection remoteConn = new Connection("rem_conn", "localhost", 11112);

remAE.addConnection(remoteConn);

AAssociateRQ assocReq = new AAssociateRQ();

PresentationContext pc = new PresentationContext(1, 0, "1.2.840.10008.1.1");
assocReq.addPresentationContext(pc);

locAE.connect(remAE, assocReq);

[Dr Suresh Viswanathan]

Mayam is an open source DICOM Workstation written in Java. You can go through the source code and see how DICOM associations take place. 

Suresh. 

On 01-Mar-2018, at 21:53, Tamás Sipos <swir...@gmail.com> wrote:

I'd like to establish a DICOM association between dcm4chee (2.18.3) and my JAVA application using the dcm4che (5.12.0) toolkit.

The problem is that it doesn't seem to be any documentation available on how to use dcm4che in a JAVA application, so all I can do is read dcm4che's source code and try to figure out what its classes and methods are for, but I'm stuck. If someone already has a working example it would be very helpful.

So far I have:

import org.dcm4che3.net.ApplicationEntity;
import org.dcm4che3.net.Connection;

import org.dcm4che3.net.pdu.AAssociateRQ;
import org.dcm4che3.net.pdu.PresentationContext;

...

ApplicationEntity locAE = new ApplicationEntity("THIS_JAVA_APP");
Connection localConn = new Connection("loc_conn", "localhost", 11112);

locAE.addConnection(localConn);

ApplicationEntity remAE = new ApplicationEntity("DCM4CHEE");
Connection remoteConn = new Connection("rem_conn", "localhost", 11112);

remAE.addConnection(remoteConn);

AAssociateRQ assocReq = new AAssociateRQ();

PresentationContext pc = new PresentationContext(1, 0, "1.2.840.10008.1.1");
assocReq.addPresentationContext(pc);

locAE.connect(remAE, assocReq);

but I don't know whether I'm on the right path doing it.

The error I get:

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)

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[Tamás Sipos]

Thanks Jon for the suggestion, but those files I've already browsed over, looking for information which parameters and how should be defined for the association request (I mean things like Implementation Class UID, Implementation Version Name, Application Context Name, Application Name, etc) but I didn't find anything like that. I don't know how and where to specify the Presentation Context either.

I'm just guessing that all these things are necessary, maybe they're not, I don't know. Is it really inside the dcm4che-tool folder? I don't see any line for example in which things like Abstract Syntax or Transfer Syntax would be defined..

[Tamás Sipos]

I got it working, see my question on stackoverflow for the solution.