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

extensions/cornerstone/src/utils/measurementServiceMappings/RectangleROI.ts

@@ -1,6 +1,5 @@
 import SUPPORTED_TOOLS from './constants/supportedTools';
 import getSOPInstanceAttributes from './utils/getSOPInstanceAttributes';
-import getModalityUnit from './utils/getModalityUnit';
 import { utils } from '@ohif/core';
 
 const RectangleROI = {
@@ -106,8 +105,7 @@ function getMappedAnnotations(annotation, DisplaySetService) {
     );
 
     const { SeriesNumber } = displaySet;
-    const { mean, stdDev, max, area, Modality } = targetStats;
-    const unit = getModalityUnit(Modality);
+    const { mean, stdDev, max, area, Modality, modalityUnit } = targetStats;
 
     annotations.push({
       SeriesInstanceUID,
@@ -115,7 +113,7 @@ function getMappedAnnotations(annotation, DisplaySetService) {
       SeriesNumber,
       frameNumber,
       Modality,
-      unit,
+      unit: modalityUnit,
       mean,
       stdDev,
       max,