fix(calibration): do not override user set calibration (#5231)

Co-authored-by: Bill Wallace <wayfarer3130@gmail.com>

platform/core/src/classes/MetadataProvider.ts

@@ -535,11 +535,17 @@ const WADO_IMAGE_LOADER = {
     let imageOrientationPatient;
     if (PixelSpacing) {
       [rowPixelSpacing, columnPixelSpacing] = PixelSpacing;
-      calibratedPixelSpacingMetadataProvider.add(instance.imageId, {
-        rowPixelSpacing: parseFloat(PixelSpacing[0]),
-        columnPixelSpacing: parseFloat(PixelSpacing[1]),
-        type,
-      });
+      const calibratedPixelSpacing = utilities.calibratedPixelSpacingMetadataProvider.get(
+        'calibratedPixelSpacing',
+        instance.imageId
+      );
+      if (!calibratedPixelSpacing) {
+        calibratedPixelSpacingMetadataProvider.add(instance.imageId, {
+          rowPixelSpacing: parseFloat(PixelSpacing[0]),
+          columnPixelSpacing: parseFloat(PixelSpacing[1]),
+          type,
+        });
+      }
     } else {
       rowPixelSpacing = columnPixelSpacing = 1;
       usingDefaultValues = true;