diff --git a/extensions/dicom-segmentation/src/components/SegmentationPanel/SegmentationPanel.js b/extensions/dicom-segmentation/src/components/SegmentationPanel/SegmentationPanel.js
index 324d05da3..256baf142 100644
--- a/extensions/dicom-segmentation/src/components/SegmentationPanel/SegmentationPanel.js
+++ b/extensions/dicom-segmentation/src/components/SegmentationPanel/SegmentationPanel.js
@@ -36,6 +36,7 @@ const { studyMetadataManager } = utils;
  * @param {Function} props.onConfigurationChange - Configuration change handler
  * @param {Function} props.activeContexts - List of active application contexts
  * @param {Function} props.contexts - List of available application contexts
+ * @param {Function} props.servicesManager - Services manager
  * @returns component
  */
 const SegmentationPanel = ({
@@ -50,6 +51,7 @@ const SegmentationPanel = ({
   onSelectedSegmentationChange,
   activeContexts = [],
   contexts = {},
+  servicesManager,
 }) => {
   const isVTK = () => activeContexts.includes(contexts.VTK);
   const isCornerstone = () => activeContexts.includes(contexts.CORNERSTONE);
@@ -59,6 +61,9 @@ const SegmentationPanel = ({
    * store with context to make these kind of things less blurry.
    */
   const { configuration } = cornerstoneTools.getModule('segmentation');
+  if (configuration.segsTolerance === undefined) {
+    configuration.segsTolerance = 1e-2;
+  }
   const DEFAULT_BRUSH_RADIUS = configuration.radius || 10;
 
   /*
@@ -87,6 +92,25 @@ const SegmentationPanel = ({
     return studyMetadata.getFirstImageId(displaySetInstanceUID);
   };
 
+  const getAllSegDisplaySets = () => {
+    const { StudyInstanceUID } = getActiveViewport();
+    const studyMetadata = studyMetadataManager.get(StudyInstanceUID);
+    return studyMetadata.getDerivedDatasets({
+      Modality: 'SEG',
+    });
+  };
+
+  const updateSegDisplaySetsTolerance = tolerance => {
+    const segDisplaySets = getAllSegDisplaySets();
+    segDisplaySets.forEach(segDisplaySet => {
+      // update tol value
+      segDisplaySet.tolerance = tolerance;
+      // reset load flags for allowing retry for seg parsing.
+      segDisplaySet.isLoaded = false;
+      segDisplaySet.loadError = false;
+    });
+  };
+
   const getActiveLabelMaps3D = () => {
     const { labelmaps3D, activeLabelmapIndex } = getBrushStackState();
     return labelmaps3D[activeLabelmapIndex];
@@ -598,7 +622,9 @@ const SegmentationPanel = ({
     configuration.outlineWidth = newConfiguration.outlineWidth;
     configuration.fillAlphaInactive = newConfiguration.fillAlphaInactive;
     configuration.outlineAlphaInactive = newConfiguration.outlineAlphaInactive;
+    configuration.segsTolerance = newConfiguration.segsTolerance;
     onConfigurationChange(newConfiguration);
+    updateSegDisplaySetsTolerance(configuration.segsTolerance);
     refreshViewports();
   };
 
@@ -647,6 +673,7 @@ const SegmentationPanel = ({
         configuration={configuration}
         onBack={() => setState(state => ({ ...state, showSettings: false }))}
         onChange={updateConfiguration}
+        servicesManager={servicesManager}
       />
     );
   } else {
diff --git a/extensions/dicom-segmentation/src/components/SegmentationSettings/SegmentationSettings.js b/extensions/dicom-segmentation/src/components/SegmentationSettings/SegmentationSettings.js
index 3d637b80f..6da70951b 100644
--- a/extensions/dicom-segmentation/src/components/SegmentationSettings/SegmentationSettings.js
+++ b/extensions/dicom-segmentation/src/components/SegmentationSettings/SegmentationSettings.js
@@ -4,7 +4,7 @@ import { Range } from '@ohif/ui';
 
 import './SegmentationSettings.css';
 
-const SegmentationSettings = ({ configuration, onBack, onChange, disabledFields = [] }) => {
+const SegmentationSettings = ({ configuration, onBack, onChange, servicesManager, disabledFields = [] }) => {
   const [state, setState] = useState({
     renderFill: configuration.renderFill,
     renderOutline: configuration.renderOutline,
@@ -13,7 +13,8 @@ const SegmentationSettings = ({ configuration, onBack, onChange, disabledFields
     outlineAlpha: configuration.outlineAlpha,
     outlineWidth: configuration.outlineWidth,
     fillAlphaInactive: configuration.fillAlphaInactive,
-    outlineAlphaInactive: configuration.outlineAlphaInactive
+    outlineAlphaInactive: configuration.outlineAlphaInactive,
+    segsTolerance: configuration.segsTolerance,
   });
 
   useEffect(() => {
@@ -133,6 +134,40 @@ const SegmentationSettings = ({ configuration, onBack, onChange, disabledFields
           )}
         </div>
       )}
+      <div className="settings-group" style={{ marginBottom: 15 }}>
+        <label style={{ margin: '0 15px' }}>
+          Tolerance:
+          <input
+            style={{ margin: '0 15px' }}
+            label="Tolerance"
+            onKeyPress={event => {
+              const validate = string => {
+                let rgx = /[^-.e0-9]+/g;
+                return string.match(rgx);
+              };
+
+              if (validate(event.key)) {
+                event.preventDefault();
+              }
+            }}
+            onChange={event => {
+              save('segsTolerance', event.target.value);
+
+              const { UINotificationService, LoggerService } = servicesManager.services;
+              const error = new Error('Segmentation loader tolerance changed. This operation can potentially generate errors in the Segmentation parsing.');
+              LoggerService.error({ error, message: error.message });
+              UINotificationService.show({
+                title: 'Segmentation panel',
+                message: error.message,
+                type: 'warning',
+                autoClose: true,
+              });
+              }
+            }
+            value={state.segsTolerance}
+          />
+        </label>
+      </div>
     </div>
   );
 };
@@ -169,11 +204,12 @@ SegmentationSettings.propTypes = {
     renderFill: PropTypes.bool.isRequired,
     renderOutline: PropTypes.bool.isRequired,
     shouldRenderInactiveLabelmaps: PropTypes.bool.isRequired,
-    fillAlpha: PropTypes.oneOfType([PropTypes.string, PropTypes.number]).isRequired, /* TODO: why fillAlpha is string? */
-    outlineAlpha: PropTypes.oneOfType([PropTypes.string, PropTypes.number]).isRequired, /* TODO: why fillAlpha is string? */
+    fillAlpha: PropTypes.oneOfType([PropTypes.string, PropTypes.number]).isRequired,
+    outlineAlpha: PropTypes.oneOfType([PropTypes.string, PropTypes.number]).isRequired,
     outlineWidth: PropTypes.number.isRequired,
-    fillAlphaInactive: PropTypes.number.isRequired,
-    outlineAlphaInactive: PropTypes.number.isRequired,
+    fillAlphaInactive: PropTypes.oneOfType([PropTypes.string, PropTypes.number]).isRequired,
+    outlineAlphaInactive: PropTypes.oneOfType([PropTypes.string, PropTypes.number]).isRequired,
+    segsTolerance: PropTypes.oneOfType([PropTypes.string, PropTypes.number]).isRequired,
   }).isRequired,
   onBack: PropTypes.func.isRequired,
   onChange: PropTypes.func.isRequired,
diff --git a/extensions/dicom-segmentation/src/getOHIFDicomSegSopClassHandler.js b/extensions/dicom-segmentation/src/getOHIFDicomSegSopClassHandler.js
index 8adcd68d4..9b3998dff 100644
--- a/extensions/dicom-segmentation/src/getOHIFDicomSegSopClassHandler.js
+++ b/extensions/dicom-segmentation/src/getOHIFDicomSegSopClassHandler.js
@@ -62,6 +62,7 @@ export default function getSopClassHandlerModule({ servicesManager }) {
         SeriesNumber,
         SeriesDescription,
         metadata,
+        tolerance: 1e-2,
       };
 
       segDisplaySet.getSourceDisplaySet = function(
@@ -93,7 +94,7 @@ export default function getSopClassHandlerModule({ servicesManager }) {
           referencedDisplaySet.SeriesInstanceUID
         );
 
-        const results = await _parseSeg(segArrayBuffer, imageIds);
+        const results = await _parseSeg(segArrayBuffer, imageIds, segDisplaySet.tolerance);
         if (results === undefined) {
           return;
         }
@@ -149,10 +150,13 @@ export default function getSopClassHandlerModule({ servicesManager }) {
   };
 }
 
-function _parseSeg(arrayBuffer, imageIds) {
-  const skipOverlapping = false;
-  const tolerance = 1e-2;
-  const cornerstoneToolsVersion = 4;
+function _parseSeg(
+  arrayBuffer,
+  imageIds,
+  tolerance = 1e-2,
+  skipOverlapping = false,
+  cornerstoneToolsVersion = 4
+) {
   return dcmjs.adapters.Cornerstone.Segmentation.generateToolState(
     imageIds,
     arrayBuffer,
diff --git a/extensions/dicom-segmentation/src/index.js b/extensions/dicom-segmentation/src/index.js
index 17bd246b7..a7d96fa59 100644
--- a/extensions/dicom-segmentation/src/index.js
+++ b/extensions/dicom-segmentation/src/index.js
@@ -78,6 +78,7 @@ export default {
           onConfigurationChange={onConfigurationChangeHandler}
           onSelectedSegmentationChange={onSelectedSegmentationChangeHandler}
           onDisplaySetLoadFailure={onDisplaySetLoadFailureHandler}
+          servicesManager={servicesManager}
         />
       );
     };