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 ab408feb..acf7dbf0 100644
--- a/src/views/trials/trials-panel/reading/dicoms3D/components/PetCtViewport.vue
+++ b/src/views/trials/trials-panel/reading/dicoms3D/components/PetCtViewport.vue
@@ -5,7 +5,7 @@
     :style="{ color: series.Modality === 'PT' || series.Modality === 'NM' || isMip ? '#666' : '#ddd' }">
     <div v-if="isFusion" class="opacity-slider-wrapper" @mousedown.stop @mousemove.stop @mouseup.stop @wheel.stop>
       <div class="slider-title">{{ Math.round(fusionOpacity * 100) }}%</div>
-      <input type="range" min="0" max="1" step="0.05" v-model.number="fusionOpacity" @input="applyFusionOpacity"
+      <input type="range" min="0" max="1" step="0.01" v-model.number="fusionOpacity" @input="applyFusionOpacity"
         class="opacity-slider" />
     </div>
     <div v-if="series && taskInfo" class="left-top-text">
@@ -104,6 +104,7 @@ import {
   setMipTransferFunctionForVolumeActor,
   setPetTransferFunctionForVolumeActor
 } from './helpers/index.js'
+import setNmFusionColorMapTransferFunctionForVolumeActor from './helpers/setNmFusionColorMapTransferFunctionForVolumeActor'
 const { BlendModes, OrientationAxis } = Enums; 
 const { getColormap } = csUtils.colormap;
 import { vec3, mat4 } from 'gl-matrix'
@@ -173,7 +174,7 @@ export default {
       ptVolumeId: null,
       loading: false,
       Colorbar: null,
-      fusionOpacity: 0.5,
+      fusionOpacity: 0.95,
       topFusionVolumeActor: null,
       currentVoiUpper: null
     }
@@ -278,13 +279,13 @@ export default {
       }
       if (properties && properties.voiRange) {
         var { lower, upper } = properties.voiRange
-        if ((!upper || upper === 0) && this.currentVoiUpper > 0) {
+        if ((!upper || upper < 1) && this.currentVoiUpper >= 1) {
           upper = this.currentVoiUpper
         } else if (upper) {
           this.currentVoiUpper = upper
         }
 
-        if (!upper) return
+        if (!upper || upper < 1) return
 
         const { windowWidth, windowCenter } = csUtils.windowLevel.toWindowLevel(
           lower,
@@ -554,7 +555,17 @@ export default {
       const ptFusionEntry = {
         volumeId: ptFusionVolumeId,
         callback: (r) => {
-          setPetColorMapTransferFunctionForVolumeActor({ ...r, volumeId: ptFusionVolumeId })
+          if (this.series.Modality === 'NM') {
+            setNmFusionColorMapTransferFunctionForVolumeActor({
+              ...r,
+              volumeId: ptFusionVolumeId,
+            })
+          } else {
+            setPetColorMapTransferFunctionForVolumeActor({
+              ...r,
+              volumeId: ptFusionVolumeId,
+            })
+          }
           if (!this.fusionCtOnTop) {
             this.topFusionVolumeActor = r.volumeActor
           }
@@ -564,14 +575,20 @@ export default {
       }
  
       const volumes = []
-      if (this.series.Modality !== 'NM') {
-        volumes.push({
-          volumeId: this.volumeId,
-          callback: (r) => {
-            console.log("融合pet渲染成功");
-          }
-        })
-      }
+      // if (this.series.Modality !== 'NM') {
+      //   volumes.push({
+      //     volumeId: this.volumeId,
+      //     callback: (r) => {
+      //       console.log("融合pet渲染成功");
+      //     }
+      //   })
+      // }
+      volumes.push({
+        volumeId: this.volumeId,
+        callback: (r) => {
+          console.log("融合pet渲染成功");
+        }
+      })
 
       if (this.fusionCtOnTop) {
         volumes.push(ptFusionEntry, ctEntry)
diff --git a/src/views/trials/trials-panel/reading/dicoms3D/components/helpers/setNmFusionColorMapTransferFunctionForVolumeActor.js b/src/views/trials/trials-panel/reading/dicoms3D/components/helpers/setNmFusionColorMapTransferFunctionForVolumeActor.js
new file mode 100644
index 00000000..3a0433ab
--- /dev/null
+++ b/src/views/trials/trials-panel/reading/dicoms3D/components/helpers/setNmFusionColorMapTransferFunctionForVolumeActor.js
@@ -0,0 +1,46 @@
+import vtkColorTransferFunction from "@kitware/vtk.js/Rendering/Core/ColorTransferFunction";
+import vtkPiecewiseFunction from "@kitware/vtk.js/Common/DataModel/PiecewiseFunction";
+import { cache, metaData, utilities } from "@cornerstonejs/core";
+
+const { getColormap } = utilities.colormap;
+
+function getWindowCenterFromVolumeId(volumeId) {
+  if (!volumeId) return null;
+  const imageVolume = cache.getVolume?.(volumeId);
+  const imageId = imageVolume?.imageIds?.[0];
+  if (!imageId) return null;
+  const voiLutModule = metaData.get("voiLutModule", imageId);
+  const rawCenter = Array.isArray(voiLutModule?.windowCenter)
+    ? voiLutModule.windowCenter[0]
+    : voiLutModule?.windowCenter;
+  const center = Number(rawCenter);
+  return Number.isFinite(center) ? center : null;
+}
+
+export default function setPetColorMapTransferFunctionForVolumeActor({
+  volumeActor,
+  volumeId,
+  preset,
+}) {
+  const mapper = volumeActor.getMapper?.();
+  if (mapper?.setSampleDistance) {
+    mapper.setSampleDistance(1.0);
+  }
+
+  const cfun = vtkColorTransferFunction.newInstance();
+  const presetToUse = preset || getColormap("siemens");
+  cfun.applyColorMap(presetToUse);
+
+  const center = getWindowCenterFromVolumeId(volumeId);
+  const upper = Number.isFinite(center) && center > 1 ? center : 5;
+  cfun.setMappingRange(1, upper);
+
+  volumeActor.getProperty().setRGBTransferFunction(0, cfun);
+
+  const ofun = vtkPiecewiseFunction.newInstance();
+  const rampX = Number.isFinite(upper) && upper > 0 ? Math.min(0.1, upper * 0.02) : 0.1;
+  ofun.addPoint(0, 0.0);
+  ofun.addPoint(rampX, 0.9);
+  ofun.addPoint(upper, 1.0);
+  volumeActor.getProperty().setScalarOpacity(0, ofun);
+}