fix: Make StudyInstanceUID optional to retrieve a Series from DicomMetadataStore (#4644)

platform/core/src/services/DicomMetadataStore/DicomMetadataStore.ts

@@ -58,6 +58,11 @@ function _getStudy(StudyInstanceUID) {
 }
 
 function _getSeries(StudyInstanceUID, SeriesInstanceUID) {
+  if(!StudyInstanceUID) {
+    const series = _model.studies.map(study => study.series).flat();
+    return series.find(aSeries => aSeries.SeriesInstanceUID === SeriesInstanceUID);
+  }
+
   const study = _getStudy(StudyInstanceUID);
 
   if (!study) {