First pass at a Hanging Protocol implementation and editor (LT-131)

Packages/worklist/server/services/dimse/retrieveMetadata.js

@@ -0,0 +1,125 @@
+/**
+ * Parses the SourceImageSequence, if it exists, in order
+ * to return a ReferenceSOPInstanceUID. The ReferenceSOPInstanceUID
+ * is used to refer to this image in any accompanying DICOM-SR documents.
+ *
+ * @param instance
+ * @returns {String} The ReferenceSOPInstanceUID
+ */
+function getSourceImageInstanceUid(instance) {
+    // TODO= Parse the whole Source Image Sequence
+    // This is a really poor workaround for now.
+    // Later we should probably parse the whole sequence.
+    var SourceImageSequence = instance[0x00082112];
+    if (SourceImageSequence && SourceImageSequence.length) {
+        return SourceImageSequence[0][0x00081155];
+    }
+}
+
+/**
+ * Parses result data from a DIMSE search into Study MetaData
+ * Returns an object populated with study metadata, including the
+ * series list.
+ *
+ * @param resultData
+ * @returns {{seriesList: Array, patientName: *, patientId: *, accessionNumber: *, studyDate: *, modalities: *, studyDescription: *, imageCount: *, studyInstanceUid: *}}
+ */
+function resultDataToStudyMetadata(studyInstanceUid, resultData) {
+    log.info('resultDataToStudyMetadata');
+    var seriesMap = {};
+    var seriesList = [];
+
+    if (!resultData.length) {
+        return;
+    }
+
+    var anInstance = resultData[0].toObject();
+    if (!anInstance) {
+        return;
+    }
+
+    var studyData = {
+        seriesList: seriesList,
+        patientName: anInstance[0x00100010],
+        patientId: anInstance[0x00100020],
+        accessionNumber: anInstance[0x00080050],
+        studyDate: anInstance[0x00080020],
+        modalities: anInstance[0x00080061],
+        studyDescription: anInstance[0x00081030],
+        imageCount: anInstance[0x00201208],
+        studyInstanceUid: anInstance[0x0020000D]
+    };
+
+    resultData.forEach(function(instanceRaw) {
+        var instance = instanceRaw.toObject();
+        var seriesInstanceUid = instance[0x0020000E];
+        var series = seriesMap[seriesInstanceUid];
+        if (!series) {
+            series = {
+                seriesDescription: instance[0x0008103E],
+                modality: instance[0x00080060],
+                seriesInstanceUid: seriesInstanceUid,
+                seriesNumber: parseFloat(instance[0x00200011]),
+                instances: []
+            };
+            seriesMap[seriesInstanceUid] = series;
+            seriesList.push(series);
+        }
+
+        var sopInstanceUid = instance[0x00080018];
+        
+        var instanceSummary = {
+            imageType: instance[0x00080008],
+            sopClassUid: instance[0x00080016],
+            sopInstanceUid: sopInstanceUid,
+            instanceNumber: parseFloat(instance[0x00200013]),
+            imagePositionPatient: instance[0x00200032],
+            imageOrientationPatient: instance[0x00200037],
+            frameOfReferenceUID: instance[0x00200052],
+            sliceLocation: parseFloat(instance[0x00201041]),
+            samplesPerPixel: parseFloat(instance[0x00280002]),
+            photometricInterpretation: instance[0x00280004],
+            rows: parseFloat(instance[0x00280010]),
+            columns: parseFloat(instance[0x00280011]),
+            pixelSpacing: instance[0x00280030],
+            bitsAllocated: parseFloat(instance[0x00280100]),
+            bitsStored: parseFloat(instance[0x00280101]),
+            highBit: parseFloat(instance[0x00280102]),
+            pixelRepresentation: parseFloat(instance[0x00280103]),
+            windowCenter: instance[0x00281050],
+            windowWidth: instance[0x00281051],
+            rescaleIntercept: parseFloat(instance[0x00281052]),
+            rescaleSlope: parseFloat(instance[0x00281053]),
+            sourceImageInstanceUid: getSourceImageInstanceUid(instance),
+            laterality: instance[0x00200062],
+            viewPosition: instance[0x00185101],
+            numFrames: parseFloat(instance[0x00280008]),
+            frameTime: parseFloat(instance[0x00181063])
+        };
+
+        // Retrieve the actual data over WADO-URI
+        var server = Meteor.settings.dicomWeb.endpoints[0];
+        instanceSummary.wadouri = server.wadoUriRoot + '?requestType=WADO&studyUID=' + studyInstanceUid + '&seriesUID=' + seriesInstanceUid + '&objectUID=' + sopInstanceUid + "&contentType=application%2Fdicom";
+
+        series.instances.push(instanceSummary);
+    });
+
+    return studyData;
+}
+
+/**
+ * Retrieved Study MetaData from a DICOM server using DIMSE
+ * @param studyInstanceUid
+ * @returns {{seriesList: Array, patientName: *, patientId: *, accessionNumber: *, studyDate: *, modalities: *, studyDescription: *, imageCount: *, studyInstanceUid: *}}
+ */
+Services.DIMSE.RetrieveMetadata = function(studyInstanceUid) {
+    var result = DIMSE.retrieveInstances(studyInstanceUid);
+
+    var study = resultDataToStudyMetadata(studyInstanceUid, result);
+    if (!study) {
+        study = {};
+    }
+
+    study.studyInstanceUid = studyInstanceUid;
+    return study;
+};