diff --git a/IRaCIS.Core.Application/Service/Visit/SubjectVisitService.cs b/IRaCIS.Core.Application/Service/Visit/SubjectVisitService.cs
index da334cde8..67a57d78e 100644
--- a/IRaCIS.Core.Application/Service/Visit/SubjectVisitService.cs
+++ b/IRaCIS.Core.Application/Service/Visit/SubjectVisitService.cs
@@ -646,7 +646,7 @@ namespace IRaCIS.Core.Application.Services
                 #region dicom 关键序列处理       
 
                 //已经签名的任务，加关键序列
-                if (taskInfo.ReadingTaskState == ReadingTaskState.HaveSigned)
+                if (taskInfo!=null)
                 {
                     var rowInfoList = await _readingTableAnswerRowInfoRepository.Where(x => x.VisitTaskId == indto.VisitTaskId && x.StudyId != null).OrderBy(x => x.ReadingQuestionTrial.ShowOrder).ThenBy(x => x.RowIndex).Select(x => new StudyInstanceInfo()
                     {