diff --git a/IRaCIS.Core.Application/Service/Reading/ReadingCalculateService.cs b/IRaCIS.Core.Application/Service/Reading/ReadingCalculateService.cs
index eb366f87b..387db12c4 100644
--- a/IRaCIS.Core.Application/Service/Reading/ReadingCalculateService.cs
+++ b/IRaCIS.Core.Application/Service/Reading/ReadingCalculateService.cs
@@ -656,10 +656,9 @@ namespace IRaCIS.Core.Application.Service
 			var targetLesion = inDto.QuestionInfo.Where(x => x.QuestionType == QuestionType.TargetLesion).Select(x => x.Answer).FirstOrDefault();
 			var noTargetLesion = inDto.QuestionInfo.Where(x => x.QuestionType == QuestionType.NoTargetLesion).Select(x => x.Answer).FirstOrDefault();
 			var newLesions = inDto.QuestionInfo.Where(x => x.QuestionType == QuestionType.NewLesions).Select(x => x.Answer).FirstOrDefault();
-			var result = await _tumorAssessmentRepository.Where(x => x.TargetLesion.GetEnumInt() == targetLesion && x.NonTargetLesions.GetEnumInt() == noTargetLesion && x.NewLesion.GetEnumInt() == newLesions).Select(x => x.OverallEfficacy).FirstOrDefaultAsync();
-
-			return result ?? string.Empty;
+			var result = await _tumorAssessmentRepository.Where(x => x.TargetLesion.GetEnumInt() == targetLesion && x.NonTargetLesions.GetEnumInt() == noTargetLesion && x.NewLesion.GetEnumInt() == newLesions).Select(x => x.OverallEfficacy).ToListAsync();
 
+			return result.Count == 0 ? string.Empty : result[0].GetEnumInt();
 		}
 		#endregion