diff --git a/IRaCIS.Core.Application/Service/Reading/ReadingImageTask/ReadingImageTaskService.cs b/IRaCIS.Core.Application/Service/Reading/ReadingImageTask/ReadingImageTaskService.cs
index 66c3c4f9e..0f4927f11 100644
--- a/IRaCIS.Core.Application/Service/Reading/ReadingImageTask/ReadingImageTaskService.cs
+++ b/IRaCIS.Core.Application/Service/Reading/ReadingImageTask/ReadingImageTaskService.cs
@@ -70,7 +70,7 @@ namespace IRaCIS.Core.Application.Service
         /// <param name="inDto"></param>
         /// <returns></returns>
         [HttpPost]
-        public async Task<TNMValueDto> GetTNMValue(TNMValueDto inDto)
+        public async Task<TNMValueDto?> GetTNMValue(TNMValueDto inDto)
         {
             var result= await _visitTaskRepository.Where(x=>x.Id==inDto.VisitTaskId).Select(x => new TNMValueDto()
             {
@@ -89,6 +89,7 @@ namespace IRaCIS.Core.Application.Service
         [HttpPost]
         public async Task<TNMValueDto> SetTNMValue(TNMValueDto inDto)
         {
+            await this.VerifyTaskIsSign(inDto.VisitTaskId);
             await _visitTaskRepository.UpdatePartialFromQueryAsync(x => x.Id == inDto.VisitTaskId, x => new VisitTask()
             {
                 TNMValue = inDto.TNMValue