diff --git a/IRaCIS.Core.Application/Service/ReadingCalculate/OCTCalculateService.cs b/IRaCIS.Core.Application/Service/ReadingCalculate/OCTCalculateService.cs
index 18dd08dc8..9748d3cf5 100644
--- a/IRaCIS.Core.Application/Service/ReadingCalculate/OCTCalculateService.cs
+++ b/IRaCIS.Core.Application/Service/ReadingCalculate/OCTCalculateService.cs
@@ -1000,7 +1000,7 @@ namespace IRaCIS.Core.Application.Service.ReadingCalculate
                 // 匹配动脉段最小FCT
                 tableAnswers.Add(new ReadingTableQuestionAnswer()
                 {
-                    Answer = oCTFCTInfos.Where(x => x.PlaqueNum == item).Count()==0? "NA" : GetDigitPlacesData(oCTFCTInfos.Where(x => x.PlaqueNum == item).MinOrDefault(x => x.Data).ToString()),
+                    Answer = oCTFCTInfos.Where(x => x.PlaqueNum == item).Count()==0? string.Empty : GetDigitPlacesData(oCTFCTInfos.Where(x => x.PlaqueNum == item).MinOrDefault(x => x.Data).ToString()),
                     Id = NewId.NextGuid(),
                     QuestionId = patchDataStatisticsInfo.Id,
                     TrialId = inDto.TrialId,
@@ -1013,7 +1013,7 @@ namespace IRaCIS.Core.Application.Service.ReadingCalculate
                 // 平均最小FCT
                 tableAnswers.Add(new ReadingTableQuestionAnswer()
                 {
-                    Answer = oCTFCTInfos.Where(x => x.PlaqueNum == item).Count() == 0 ? "NA" : GetDigitPlacesData(oCTFCTInfos.Where(x => x.PlaqueNum == item).Average(x => x.Data).ToString()),
+                    Answer = oCTFCTInfos.Where(x => x.PlaqueNum == item).Count() == 0 ? string.Empty : GetDigitPlacesData(oCTFCTInfos.Where(x => x.PlaqueNum == item).Average(x => x.Data).ToString()),
                     Id = NewId.NextGuid(),
                     QuestionId = patchDataStatisticsInfo.Id,
                     TrialId = inDto.TrialId,
@@ -1026,7 +1026,7 @@ namespace IRaCIS.Core.Application.Service.ReadingCalculate
                 // 脂质角度平均值
                 tableAnswers.Add(new ReadingTableQuestionAnswer()
                 {
-                    Answer = lipidAngleInfos.Where(x => x.PlaqueNum == item).Count() == 0 ? "NA" : GetDigitPlacesData(lipidAngleInfos.Where(x => x.PlaqueNum == item).Average(x => x.Data).ToString()),
+                    Answer = lipidAngleInfos.Where(x => x.PlaqueNum == item).Count() == 0 ? string.Empty : GetDigitPlacesData(lipidAngleInfos.Where(x => x.PlaqueNum == item).Average(x => x.Data).ToString()),
                     Id = NewId.NextGuid(),
                     QuestionId = patchDataStatisticsInfo.Id,
                     TrialId = inDto.TrialId,
@@ -1039,7 +1039,7 @@ namespace IRaCIS.Core.Application.Service.ReadingCalculate
                 // 脂质角度最大值
                 tableAnswers.Add(new ReadingTableQuestionAnswer()
                 {
-                    Answer = lipidAngleInfos.Where(x => x.PlaqueNum == item).Count() == 0 ? "NA" : GetDigitPlacesData(lipidAngleInfos.Where(x => x.PlaqueNum == item).MaxOrDefault(x => x.Data).ToString()),
+                    Answer = lipidAngleInfos.Where(x => x.PlaqueNum == item).Count() == 0 ? string.Empty : GetDigitPlacesData(lipidAngleInfos.Where(x => x.PlaqueNum == item).MaxOrDefault(x => x.Data).ToString()),
                     Id = NewId.NextGuid(),
                     QuestionId = patchDataStatisticsInfo.Id,
                     TrialId = inDto.TrialId,