fix(PT measurement units): Use the modality unit that arrives from cornerstone3d instead of calculating the modality unit (again) here. (#3533)

platform/core/src/classes/MetadataProvider.js

@@ -405,6 +405,14 @@ class MetadataProvider {
         };
 
         break;
+      case WADO_IMAGE_LOADER_TAGS.PER_SERIES_MODULE:
+        metadata = {
+          correctedImage: instance.CorrectedImage,
+          units: instance.Units,
+          decayCorrection: instance.DecayCorrection,
+        };
+        break;
+
       default:
         return;
     }
@@ -508,6 +516,7 @@ const WADO_IMAGE_LOADER_TAGS = {
   MODALITY_LUT_MODULE: 'modalityLutModule',
   SOP_COMMON_MODULE: 'sopCommonModule',
   PET_ISOTOPE_MODULE: 'petIsotopeModule',
+  PER_SERIES_MODULE: 'petSeriesModule',
   OVERLAY_PLANE_MODULE: 'overlayPlaneModule',
   PATIENT_DEMOGRAPHIC_MODULE: 'patientDemographicModule',