diff --git a/IRaCIS.Core.Application/Service/ReadingCalculate/LuganoCalculateService.cs b/IRaCIS.Core.Application/Service/ReadingCalculate/LuganoCalculateService.cs
index 88ea0f4ca..57a6dce9a 100644
--- a/IRaCIS.Core.Application/Service/ReadingCalculate/LuganoCalculateService.cs
+++ b/IRaCIS.Core.Application/Service/ReadingCalculate/LuganoCalculateService.cs
@@ -2634,7 +2634,7 @@ namespace IRaCIS.Core.Application.Service.ReadingCalculate
             }).OrderByDescending(x=>x.Answer).FirstOrDefault();
             if (maxSuv == null|| maxSuv.Answer == 0m)
             {
-                return string.Empty;
+                return "NE";
             }
             else
             {