diff --git a/public/images/dual fusion example2.png b/public/images/dual fusion example2.png
new file mode 100644
index 0000000..768d771
Binary files /dev/null and b/public/images/dual fusion example2.png differ
diff --git a/public/images/dual fusion example3.png b/public/images/dual fusion example3.png
new file mode 100644
index 0000000..26cf8d8
Binary files /dev/null and b/public/images/dual fusion example3.png differ
diff --git a/public/plugins/chatbot-extension-diagnosis.imjoy.html b/public/plugins/chatbot-extension-diagnosis.imjoy.html
index 83f1ec2..a7ab049 100644
--- a/public/plugins/chatbot-extension-diagnosis.imjoy.html
+++ b/public/plugins/chatbot-extension-diagnosis.imjoy.html
@@ -25,7 +25,7 @@
 <script lang="javascript">
 const chatbot_url = "https://bioimage.io/chat/"
 const ufish_url = "https://ufish-team.github.io/"
-//const ufish_url = "http://localhost:5173/"
+//const ufish_url = "http://localhost:5174/"
 const utils_url = ufish_url + "/plugins/chatbot-utils.imjoy.html"
 const dna_utils_url = ufish_url + "/plugins/dna-ufish-utils.imjoy.html"
 const displayer_url = ufish_url + "/plugins/img-display.imjoy.html"
@@ -64,7 +64,7 @@
         w: 25, h: 6
       });
     }
-    client.setExampleImageUrl(ufish_url + "images/test_fish_img2.jpg")
+    await client.setExampleImageUrl(ufish_url + "images/trisomy_example.png")
     return client
   }
 
@@ -281,8 +281,8 @@
           properties: {
             "condition": {
               type: "string",
-              description: "Condition to count, e.g., table['ch0+ch1']>2",
-              default: "table['ch0+ch1']>2",
+              description: "Condition to count, e.g., table['ch0+ch1']>=2. ch0,ch1,ch2 are RGB channels. 'ch0+ch1' means the yellow channel signals.",
+              default: "table['ch0+ch1']>=2",
             }
           }
         }
@@ -314,6 +314,49 @@
       }
     })
 
+    const diagnosisPrompt = `
+      Diagnosis disease using DNA-FISH data.
+      Need to run the analysisDnaFish first, then run this extension.
+      Common DNA-FISH probe and disease examples:
+        - Trisomy probe: 3 signals in one cell
+          + Example disease: Myelodysplastic syndrome (MDS)
+          + Abnormal cell: red signal >= 3
+          + Criteria: abnormal ratio >= 0.05
+        - Fusion probe: 2 fusions in one cell
+          + Example disease: PML-RARA acute leukemia
+          + Abnormal cell: yellow signal >= 2 
+          + Criteria: abnormal ratio >= 0.05
+        - Separation probe: 1 fusion and 1 separation in one cell
+          + Example disease: KMT2A gene acute leukemia
+          + Abnormal cell: yellow signal == 1, red signal == 1, green signal == 1
+          + Criteria: abnormal ratio >= 0.05
+    `
+
+    await register({
+      _rintf: true,
+      name: "DnaFishDiseaseDiagnosis",
+      description: diagnosisPrompt,
+      get_schema: async () => {
+        return {
+          type: "object",
+          title: "DnaFishDiseaseDiagnosis",
+          description: diagnosisPrompt,
+          properties: {
+            "countCondition": {
+              type: "string",
+              description: "Condition to count, e.g., table['ch0+ch1']>=2. ch0,ch1,ch2 are RGB channels. 'ch0+ch1' means the yellow channel signals.",
+              default: "table['ch0+ch1']>=2",
+            }
+          }
+        }
+      },
+      execute: async (config) => {
+        const dna_utils = await this.getDnaUtils()
+        const ratio = await dna_utils.count_cell_ratio(config.countCondition)
+        return ratio
+      }
+    })
+
     api.log('initialized')
   }
 
diff --git a/public/plugins/dna-ufish-utils.imjoy.html b/public/plugins/dna-ufish-utils.imjoy.html
index 5936f91..d1ee678 100644
--- a/public/plugins/dna-ufish-utils.imjoy.html
+++ b/public/plugins/dna-ufish-utils.imjoy.html
@@ -237,8 +237,9 @@
     masks = [masks[i] for i in selected_index]
     signals = [signals[i] for i in selected_index]
     num_plots = len(rois)
-    rows = int(np.ceil(num_plots / 5))
-    cols = min(3, num_plots)
+    cols_per_row = 3
+    rows = int(np.ceil(num_plots / cols_per_row))
+    cols = min(cols_per_row, num_plots)
     unit = 1.6
     fig, axs = plt.subplots(
         rows, cols,
@@ -482,7 +483,6 @@
             name: "ufish",
             w: 25, h: 6
           })
-        await client.setExampleImageUrl(ufish_url + "images/trisomy_example.jpg")
         await client.setOnnxModelUrl(ufish_url + "model/v1.0.1-DNAFISH_model.onnx")
         await client.waitReady()
         return client
@@ -546,18 +546,23 @@
         return self.result_summary()
 
     async def count_cell_ratio(self, condition_str):
+        num1 = await self.count_cell_number(condition_str)
+        total = await self.count_cell_number("")
+        ratio = num1 / total
+        return f"{num1}/{total}={ratio:.2f}"
+
+    async def count_cell_number(self, condition_str):
         if self.res is None:
-            return None
+            raise ValueError("No results found.")
         table = self.res["table"]
-        cell_num = table.shape[0]
-        if cell_num == 0:
-            return None
-        try:
+        if len(table) == 0:
+            raise ValueError("No cells found.")
+        if condition_str == "":
+            return table.shape[0]
+        else:
             condition = eval(condition_str)
-            ratio = table[condition].shape[0] / cell_num
-        except Exception as e:
-            return str(e)
-        return ratio
+            cell_num = table[condition].shape[0]
+        return cell_num
 
     async def count_mean_signals(self):
         if self.res is None: