diff --git a/IRaCIS.Core.Application/Service/Reading/ReadingImageTask/ReadingJudgeTaskService.cs b/IRaCIS.Core.Application/Service/Reading/ReadingImageTask/ReadingJudgeTaskService.cs
index 5856d7d9d..2ec8f6157 100644
--- a/IRaCIS.Core.Application/Service/Reading/ReadingImageTask/ReadingJudgeTaskService.cs
+++ b/IRaCIS.Core.Application/Service/Reading/ReadingImageTask/ReadingJudgeTaskService.cs
@@ -974,6 +974,16 @@ namespace IRaCIS.Core.Application.Service
                                 });
                                 break;
                             case JudgeTypeEnum.DifferenceAbsoluteValue:
+
+                                var answer1 = taskAnswer1.IsNullOrEmptyReturnNull();
+                                var answer2 = taskAnswer2.IsNullOrEmptyReturnNull();
+
+                                // 已经判断不相等了  所以只可能有一个为Null
+                                if (answer1 == null || answer2 == null)
+                                {
+                                    noteEqual = true;
+                                }
+
                                 var deffaultValue = taskAnswer1.IsNullOrEmptyReturn0() - taskAnswer2.IsNullOrEmptyReturn0();
                                 if (deffaultValue < 0)
                                 {
@@ -1000,6 +1010,17 @@ namespace IRaCIS.Core.Application.Service
 
                                 break;
                             case JudgeTypeEnum.PercentageDifference:
+
+
+                                var answer1P = taskAnswer1.IsNullOrEmptyReturnNull();
+                                var answer2P = taskAnswer2.IsNullOrEmptyReturnNull();
+
+                                // 已经判断不相等了  所以只可能有一个为Null
+                                if (answer1P == null || answer2P == null)
+                                {
+                                    noteEqual = true;
+                                }
+
                                 var value1 = taskAnswer1.IsNullOrEmptyReturn0();
                                 var value2 = taskAnswer2.IsNullOrEmptyReturn0();
                                 if (value1 == 0 || value2 == 0)
diff --git a/IRaCIS.Core.Infra.EFCore/Common/ReadingCommon.cs b/IRaCIS.Core.Infra.EFCore/Common/ReadingCommon.cs
index 41196b603..8a835bc1f 100644
--- a/IRaCIS.Core.Infra.EFCore/Common/ReadingCommon.cs
+++ b/IRaCIS.Core.Infra.EFCore/Common/ReadingCommon.cs
@@ -225,7 +225,7 @@ namespace IRaCIS.Core.Infra.EFCore.Common
             catch (Exception)
             {
 
-                return 0;
+                return null;
             }
         }
 
@@ -253,6 +253,7 @@ namespace IRaCIS.Core.Infra.EFCore.Common
 
 
 
+
         /// <summary>
         /// 获取DisplayName
         /// </summary>