diff --git a/IRaCIS.Core.Application/Service/Visit/SubjectVisitService.cs b/IRaCIS.Core.Application/Service/Visit/SubjectVisitService.cs
index 54b70656d..896dab968 100644
--- a/IRaCIS.Core.Application/Service/Visit/SubjectVisitService.cs
+++ b/IRaCIS.Core.Application/Service/Visit/SubjectVisitService.cs
@@ -339,7 +339,7 @@ namespace IRaCIS.Core.Application.Services
 
 			var instanceList = await _repository.Where<DicomInstance>(t => t.SeriesId==inDto.SeriesId)
 		  .Select(t => new { t.SeriesId, t.StudyId, t.Id, t.InstanceNumber, t.Path, t.NumberOfFrames, t.WindowCenter, t.WindowWidth, t.HtmlPath ,t.SliceLocation}).ToListAsync();
-			series.InstanceList = instanceList.Where(t => t.SeriesId == series.Id).OrderBy(t => t.SliceLocation).ThenBy(t=>t.InstanceNumber).Select(k => k.Id).ToList();
+			series.InstanceList = instanceList.Where(t => t.SeriesId == series.Id).OrderByDescending(t => t.SliceLocation).ThenBy(t=>t.InstanceNumber).Select(k => k.Id).ToList();
 
 
 			series.InstanceHtmlPathList = instanceList.Where(t => t.SeriesId == series.Id && t.HtmlPath != string.Empty).OrderBy(t => t.InstanceNumber).Select(k => k.HtmlPath).ToList();