dcm4che java_java – 从dcm4che2迁移到dcm4che3
正如您已经观察到的那样,BasicDicomObject是历史 – 与其他一些人一样.
新的“Dicom对象”是属性 – 对象是属性的集合.
因此,您创建属性,使用RQ行为(C-FIND等)所需的标记填充它们,并且您获得的是另一个Attributes对象,您可以从中拉出所需的标记.
在我看来,dcm4che 2.x在处理个别价值表征方面的含糊不清. dcm4che 3.x相当清晰.
迁移需要重写有关查询方式以及如何处理单个标记的代码.另一方面,dcm4che 3.x使新代码更少复杂.
一个相当完整的例子,从给定入藏号的PACS中检索研究;设置查询并处理结果：
String modality = null;
String accessionNumber = "1234567890";
//--------------------------------------------------------
// HERE follows setup of a query, using an Attributes object
//--------------------------------------------------------
Attributes query = new Attributes();
// Indicate character set
{
int tag = Tag.SpecificCharacterSet;
VR vr = ElementDictionary.vrOf(tag, query.getPrivateCreator(tag));
query.setString(tag, vr, "ISO_IR 100");
}
// Study level query
{
int tag = Tag.QueryRetrieveLevel;
VR vr = ElementDictionary.vrOf(tag, query.getPrivateCreator(tag));
query.setString(tag, vr, "STUDY");
}
// Accession number
{
int tag = Tag.AccessionNumber;
VR vr = ElementDictionary.vrOf(tag, query.getPrivateCreator(tag));
query.setString(tag, vr, accessionNumber);
}
// Optionally filter on modality in study if 'modality' is provided,
// otherwise retrieve modality
{
int tag = Tag.ModalitiesInStudy;
VR vr = ElementDictionary.vrOf(tag, query.getPrivateCreator(tag));
if (null != modality && modality.length() > 0) {
query.setString(tag, vr, modality);
} else {
query.setNull(tag, vr);
}
}
// We are interested in study instance UID
{
int tag = Tag.StudyInstanceUID;
VR vr = ElementDictionary.vrOf(tag, query.getPrivateCreator(tag));
query.setNull(tag, vr);
}
// Do the actual query, needing an AppliationEntity (ae),
// a local (local) and remote (remote) Connection, and
// an AAssociateRQ (rq) set up earlier.
// 1) Open a connection to the SCP
Association as = ae.connect(local, remote, rq);
// 2) Query
int priority = 0x0002; // low for the sake of demo :)
as.cfind(UID.StudyRootQueryRetrieveInformationModelFIND, query, null,
new DimseRSPHandler(as.nextMessageID()) {
@Override
public void onDimseRSP(Association assoc, Attributes cmd,
Attributes response) {
super.onDimseRSP(assoc, cmd, response);
int status = cmd.getInt(Tag.Status, -1);
if (Status.isPending(status)) {
//--------------------------------------------------------
// HERE follows handling of the response, which
// is just another Attributes object
//--------------------------------------------------------
String studyInstanceUID = response.getString(Tag.StudyInstanceUID);
// etc...
}
}
});
// 3) Close the connection to the SCP
if (as != null && as.isReadyForDataTransfer()) {
as.waitForOutstandingRSP();
as.release();
as = null;
}