diff --git a/IRaCIS.Core.Application/Service/Management/UserService.cs b/IRaCIS.Core.Application/Service/Management/UserService.cs
index c22f411b4..119045a29 100644
--- a/IRaCIS.Core.Application/Service/Management/UserService.cs
+++ b/IRaCIS.Core.Application/Service/Management/UserService.cs
@@ -521,9 +521,12 @@ namespace IRaCIS.Core.Application.Service
         }
 
 
-        public async Task<UserDetailDTO?> GetUserByEmail(string email)
+        public async Task<UserDetailDTO?> GetUserByEmail(string email = "")
         {
-
+            if (email.IsNullOrEmpty() || !email.Contains("@"))
+            {
+                return null;
+            }
 
             var user = await _identityUserRepository.Where(t => t.EMail == email).ProjectTo<UserDetailDTO>(_mapper.ConfigurationProvider).FirstOrDefaultAsync();
 
diff --git a/IRaCIS.Core.Application/Service/Visit/DTO/PatientViewModel.cs b/IRaCIS.Core.Application/Service/Visit/DTO/PatientViewModel.cs
index f906bcb6c..488782087 100644
--- a/IRaCIS.Core.Application/Service/Visit/DTO/PatientViewModel.cs
+++ b/IRaCIS.Core.Application/Service/Visit/DTO/PatientViewModel.cs
@@ -548,6 +548,8 @@ namespace IRaCIS.Application.Contracts
         public List<string> CalledAEList { get; set; } = new List<string>();
 
         public string? CallingAE { get; set; }
+
+        public string? StudyInstanceUid { get; set; } 
     }
 
 
diff --git a/IRaCIS.Core.Application/Service/Visit/PatientService.cs b/IRaCIS.Core.Application/Service/Visit/PatientService.cs
index 7c45bab42..84ea2012b 100644
--- a/IRaCIS.Core.Application/Service/Visit/PatientService.cs
+++ b/IRaCIS.Core.Application/Service/Visit/PatientService.cs
@@ -843,6 +843,8 @@ namespace IRaCIS.Application.Services
                      .WhereIf(!string.IsNullOrWhiteSpace(inQuery.PatientIdStr), t => t.Patient.PatientIdStr.Contains(inQuery.PatientIdStr))
                      .WhereIf(!string.IsNullOrWhiteSpace(inQuery.PatientName), t => t.Patient.PatientName.Contains(inQuery.PatientName))
                      .WhereIf(!string.IsNullOrWhiteSpace(inQuery.CallingAE), t => t.CallingAE == inQuery.CallingAE)
+
+                      .WhereIf(!string.IsNullOrWhiteSpace(inQuery.StudyInstanceUid), t => t.StudyInstanceUid == inQuery.StudyInstanceUid)
                         select new PatientStudySimpleView()
                         {
                             Description = scpStudy.Description,