diff --git a/src/views/trials/trials-panel/reading/dicoms/components/Fusion/js/setPetColorMapTransferFunctionForVolumeActor.js b/src/views/trials/trials-panel/reading/dicoms/components/Fusion/js/setPetColorMapTransferFunctionForVolumeActor.js
index 3aa23daa..7fe772c9 100644
--- a/src/views/trials/trials-panel/reading/dicoms/components/Fusion/js/setPetColorMapTransferFunctionForVolumeActor.js
+++ b/src/views/trials/trials-panel/reading/dicoms/components/Fusion/js/setPetColorMapTransferFunctionForVolumeActor.js
@@ -4,7 +4,8 @@ import vtkPiecewiseFunction from '@kitware/vtk.js/Common/DataModel/PiecewiseFunc
 import { utilities } from '@cornerstonejs/core'
 const { getColormap } = utilities.colormap
 function setPetColorMapTransferFunctionForVolumeActor(
-  volumeInfo
+  volumeInfo,
+  isPT = false
 ) {
   const { volumeActor, preset } = volumeInfo
   const mapper = volumeActor.getMapper()
@@ -22,8 +23,14 @@ function setPetColorMapTransferFunctionForVolumeActor(
 
   // Create scalar opacity function
   const ofun = vtkPiecewiseFunction.newInstance()
-  ofun.addPoint(0, 0.0)
-  ofun.addPoint(0.1, 0.9)
+  if (isPT) {
+    ofun.addPoint(0, 0.0)
+    ofun.addPoint(0.1, 1.0)
+  } else {
+    ofun.addPoint(0, 0.0)
+    ofun.addPoint(0.1, 0.9)
+  }
+
   ofun.addPoint(5, 1.0)
 
   volumeActor.getProperty().setScalarOpacity(0, ofun)
diff --git a/src/views/trials/trials-panel/reading/dicoms3D/components/PetCtViewport.vue b/src/views/trials/trials-panel/reading/dicoms3D/components/PetCtViewport.vue
index e846cfc6..333014e2 100644
--- a/src/views/trials/trials-panel/reading/dicoms3D/components/PetCtViewport.vue
+++ b/src/views/trials/trials-panel/reading/dicoms3D/components/PetCtViewport.vue
@@ -592,7 +592,7 @@ export default {
               .setVolumes([{
                 volumeId: this.volumeId, callback: (r) => {
                   if (this.series.Modality === 'PT') {
-                    setPetColorMapTransferFunctionForVolumeActor(r)
+                    setPetColorMapTransferFunctionForVolumeActor(r, true)
                   } else {
                     setCtTransferFunctionForVolumeActor(r)
                   }