diff --git a/invesalius/control.py b/invesalius/control.py
index 201a2b7..a3bf95f 100644
--- a/invesalius/control.py
+++ b/invesalius/control.py
@@ -207,21 +207,8 @@ class Controller():
         if id_type == const.ID_ANALYZE_IMPORT:
             dialog.ImportAnalyzeWarning()
 
-        # Import project treating compressed nifti exception
-        suptype = ('hdr', 'nii', 'nii.gz', 'par')
         filepath = dialog.ShowImportOtherFilesDialog(id_type)
-        if filepath is not None:
-            name = filepath.rpartition('\\')[-1].split('.')
-
-            if name[-1] == 'gz':
-                name[1] = 'nii.gz'
-
-            filetype = name[1].lower()
-
-            if filetype in suptype:
-                Publisher.sendMessage("Open other files", filepath)
-            else:
-                dialog.ImportInvalidFiles()
+        Publisher.sendMessage("Open other files", filepath)
 
     def ShowDialogOpenProject(self):
         # Offer to save current project if necessary
@@ -749,23 +736,18 @@ class Controller():
 
     def OnOpenOtherFiles(self, pubsub_evt):
         filepath = pubsub_evt.data
-        name = filepath.rpartition('\\')[-1].split('.')
-
-        if name[-1] == 'gz':
-            name[1] = 'nii.gz'
-
-        suptype = ('hdr', 'nii', 'nii.gz', 'par')
-        filetype = name[1].lower()
+        if not(filepath) == None:
+            name = filepath.rpartition('\\')[-1].split('.')
 
-        if filetype in suptype:
             group = oth.ReadOthers(filepath)
-        else:
-            dialog.ImportInvalidFiles()
-
-        matrix, matrix_filename = self.OpenOtherFiles(group)
-        self.CreateOtherProject(str(name[0]), matrix, matrix_filename)
-        self.LoadProject()
-        Publisher.sendMessage("Enable state project", True)
+            
+            if group:
+                matrix, matrix_filename = self.OpenOtherFiles(group)
+                self.CreateOtherProject(str(name[0]), matrix, matrix_filename)
+                self.LoadProject()
+                Publisher.sendMessage("Enable state project", True)
+            else:
+                dialog.ImportInvalidFiles(ftype="Others")
 
     def OpenDicomGroup(self, dicom_group, interval, file_range, gui=True):
         # Retrieve general DICOM headers
diff --git a/invesalius/gui/dialogs.py b/invesalius/gui/dialogs.py
index 08ff27a..4742f89 100644
--- a/invesalius/gui/dialogs.py
+++ b/invesalius/gui/dialogs.py
@@ -213,14 +213,15 @@ class ProgressDialog(object):
 WILDCARD_OPEN = "InVesalius 3 project (*.inv3)|*.inv3|" \
                 "All files (*.*)|*.*"
 
-WILDCARD_ANALYZE = "Analyze 7.5 (*.hdr)|*.hdr|" \
+WILDCARD_ANALYZE = "Analyze 7.5 (*.hdr)|*.[hH][dD][rR]|" \
                    "All files (*.*)|*.*"
 
 WILDCARD_NIFTI = "NIfTI 1 (*.nii)|*.nii|" \
                  "Compressed NIfTI (*.nii.gz)|*.nii.gz|" \
+                 "HDR NIfTI (*.hdr)|*.[hH][dD][rR]|" \
                  "All files (*.*)|*.*"
-
-WILDCARD_PARREC = "PAR/REC (*.par)|*.par|" \
+#".[jJ][pP][gG]"
+WILDCARD_PARREC = "PAR/REC (*.par)|*.[pP][aA][rR]|" \
                   "All files (*.*)|*.*"
 
 WILDCARD_MESH_FILES = "STL File format (*.stl)|*.stl|" \
@@ -636,8 +637,10 @@ def ImportEmptyDirectory(dirpath):
 def ImportInvalidFiles(ftype="DICOM"):
     if ftype == "Bitmap":
         msg =  _("There are no Bitmap, JPEG, PNG or TIFF files in the selected folder.")
-    else:
+    elif ftype == "DICOM":
         msg = _("There are no DICOM files in the selected folder.")
+    else:
+        msg = _("Invalid file.")
 
     if sys.platform == 'darwin':
         dlg = wx.MessageDialog(None, "", msg,
diff --git a/invesalius/reader/others_reader.py b/invesalius/reader/others_reader.py
index 9059e67..fa6407f 100644
--- a/invesalius/reader/others_reader.py
+++ b/invesalius/reader/others_reader.py
@@ -44,8 +44,11 @@ def ReadOthers(dir_):
         ow = vtk.vtkOutputWindow()
         ow.SetInstance(fow)
 
-    imagedata = nib.squeeze_image(nib.load(dir_))
-    imagedata = nib.as_closest_canonical(imagedata)
-    imagedata.update_header()
-
-    return imagedata
\ No newline at end of file
+    try:
+        imagedata = nib.squeeze_image(nib.load(dir_))
+        imagedata = nib.as_closest_canonical(imagedata)
+        imagedata.update_header()
+    except(nib.filebasedimages.ImageFileError):
+        return False
+
+    return imagedata
--
libgit2 0.21.2