diff --git a/requirements.txt b/requirements.txt
index 1c908cb..e860e2e 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -5,5 +5,5 @@
 ndicapi>=3.2.6
 numpy>=1.11
 six>=1.10
-scikit-surgerycore>=0.6.9
+scikit-surgerycore>=0.7.0
 pyserial
diff --git a/setup.py b/setup.py
index 2595bec..3f364b9 100644
--- a/setup.py
+++ b/setup.py
@@ -53,7 +53,7 @@
         'six>=1.10',
         'numpy>=1.11',
         'ndicapi>=3.2.6',
-        'scikit-surgerycore>=0.6.9',
+        'scikit-surgerycore>=0.7.0',
         'pyserial'
     ],
 )
diff --git a/sksurgerynditracker/nditracker.py b/sksurgerynditracker/nditracker.py
index 8f9f490..fcad680 100644
--- a/sksurgerynditracker/nditracker.py
+++ b/sksurgerynditracker/nditracker.py
@@ -12,7 +12,7 @@
 from serial.tools import list_ports #pylint: disable=import-error
 
 from six import int2byte
-from numpy import full, nan, reshape, transpose
+from numpy import full, nan, reshape
 from sksurgerycore.baseclasses.tracker import SKSBaseTracker
 import ndicapy
 from sksurgerynditracker.serial_utils.com_ports import \
@@ -116,7 +116,10 @@ def __init__(self, configuration):
 
             ports to probe:
 
-            use quaternions:
+            use quaternions: default is false
+
+            smoothing buffer: specify a buffer over which to average the
+                tracking, defaults to 1
 
         :raises Exception: IOError, KeyError, OSError
         """
@@ -449,7 +452,8 @@ def get_frame(self):
         port_handles = []
         time_stamps = []
         frame_numbers = []
-        tracking = []
+        tracking_rots = []
+        tracking_trans = []
         tracking_quality = []
 
         timestamp = time()
@@ -466,21 +470,13 @@ def get_frame(self):
                     descriptor.get("c_str port handle"))
                 if not qtransform == "MISSING" and not qtransform == "DISABLED":
                     tracking_quality.append(qtransform[7])
-                    if not self.use_quaternions:
-                        transform = transpose(
-                            reshape(ndicapy.ndiTransformToMatrixd(qtransform),
-                                    [4, 4]))
-                    else:
-                        transform = reshape(qtransform[0:7], [1, 7])
+                    transform = reshape(qtransform[0:7], [1, 7])
                 else:
                     tracking_quality.append(nan)
-                    if not self.use_quaternions:
-                        transform = full((4, 4), nan)
-                    else:
-                        transform = full((1, 7), nan)
-
-                tracking.append(transform)
+                    transform = full((1, 7), nan)
 
+                tracking_rots.append(transform[0][0:4])
+                tracking_trans.append(transform[0][4:7])
         else:
             for descriptor in self._tool_descriptors:
                 port_handles.append(descriptor.get(
@@ -488,13 +484,14 @@ def get_frame(self):
                 time_stamps.append(timestamp)
                 frame_numbers.append(0)
                 tracking_quality.append(0.0)
-                if not self.use_quaternions:
-                    tracking.append(full((4, 4), nan))
-                else:
-                    tracking.append(full((1, 7), nan))
+                tracking_rots.append(full((1, 4), nan))
+                tracking_trans.append(full((1, 3), nan))
+
+        self.add_frame_to_buffer(port_handles, time_stamps, frame_numbers,
+            tracking_rots, tracking_trans, tracking_quality,
+            rot_is_quaternion = True)
 
-        return port_handles, time_stamps, frame_numbers, tracking, \
-                tracking_quality
+        return self.get_smooth_frame(port_handles)
 
     def get_tool_descriptions(self):
         """ Returns the port handles and tool descriptions """
diff --git a/tests/polaris_mocks.py b/tests/polaris_mocks.py
index a92a04f..2b5d3a8 100644
--- a/tests/polaris_mocks.py
+++ b/tests/polaris_mocks.py
@@ -13,14 +13,13 @@
         "data/8700339.rom"]
     }
 
-SETTINGS_POLARIS_QUAT = {
-    "tracker type": "polaris",
-    "ports to probe": 20,
-    "romfiles" : [
-        "data/something_else.rom",
-        "data/8700339.rom"],
-    "use quaternions": "true"
-    }
+SETTINGS_POLARIS_QUAT = SETTINGS_POLARIS.copy()
+SETTINGS_POLARIS_QUAT["use quaternions"] = "true"
+
+SETTINGS_POLARIS_SMOOTH = SETTINGS_POLARIS.copy()
+SETTINGS_POLARIS_QUAT_SMOOTH = SETTINGS_POLARIS_QUAT.copy()
+SETTINGS_POLARIS_SMOOTH["smoothing buffer"] = 2
+SETTINGS_POLARIS_QUAT_SMOOTH["smoothing buffer"] = 2
 
 class MockPort:
     """A fake serial port for ndi"""
diff --git a/tests/test_sksurgerynditracker_mockndi_getframe.py b/tests/test_sksurgerynditracker_mockndi_getframe.py
index 3814057..f7e5967 100644
--- a/tests/test_sksurgerynditracker_mockndi_getframe.py
+++ b/tests/test_sksurgerynditracker_mockndi_getframe.py
@@ -6,6 +6,7 @@
 from sksurgerynditracker.nditracker import NDITracker
 
 from tests.polaris_mocks import SETTINGS_POLARIS, SETTINGS_POLARIS_QUAT, \
+        SETTINGS_POLARIS_SMOOTH, SETTINGS_POLARIS_QUAT_SMOOTH, \
         mockndiProbe, \
         mockndiOpen, mockndiGetError, mockComports, \
         mockndiGetPHSRHandle, mockndiVER, \
@@ -156,7 +157,159 @@ def test_getframe_missing(mocker):
     assert len(port_handles) == 2
     assert len(time_stamps) == 2
     assert frame_numbers.count(1) == 2
-    assert np.all(np.isnan(tracking))
+    assert np.any(np.isnan(tracking[0]))
+    assert np.any(np.isnan(tracking[1]))
+    assert np.all(np.isnan(tracking_quality))
+
+    del tracker
+
+def test_getframe_smooth_mock(mocker):
+    """
+    connects and configures, mocks ndicapy.ndiProbe to pass
+    reqs: 03, 04
+    """
+    tracker = None
+    bxsource = MockBXFrameSource()
+    ndidevice = MockNDIDevice()
+    mocker.patch('serial.tools.list_ports.comports', mockComports)
+    mocker.patch('ndicapy.ndiProbe', mockndiProbe)
+    mocker.patch('ndicapy.ndiOpen', mockndiOpen)
+    mocker.patch('ndicapy.ndiCommand', ndidevice.mockndiCommand)
+    mocker.patch('ndicapy.ndiGetError', mockndiGetError)
+    mocker.patch('ndicapy.ndiClose')
+    mocker.patch('ndicapy.ndiGetPHSRNumberOfHandles',
+            ndidevice.mockndiGetPHSRNumberOfHandles)
+    mocker.patch('ndicapy.ndiGetPHRQHandle', ndidevice.mockndiGetPHRQHandle)
+    mocker.patch('ndicapy.ndiPVWRFromFile')
+    mocker.patch('ndicapy.ndiGetPHSRHandle', mockndiGetPHSRHandle)
+    mocker.patch('ndicapy.ndiVER', mockndiVER)
+    mocker.patch('ndicapy.ndiGetBXFrame', bxsource.mockndiGetBXFrame)
+    mocker.patch('ndicapy.ndiGetBXTransform', bxsource.mockndiGetBXTransform)
+
+    tracker = NDITracker(SETTINGS_POLARIS_SMOOTH)
+
+    bxsource.setdevice(ndidevice)
+
+    (port_handles, time_stamps, frame_numbers, tracking,
+                tracking_quality ) = tracker.get_frame()
+
+    assert len(port_handles) == 2
+    assert len(time_stamps) == 2
+    assert frame_numbers.count(1) == 2
+    expected_tracking_0 = np.array([[1.,0.,0.,10.],
+                                 [0.,1.,0.,-20.],
+                                 [0.,0.,1.,5.],
+                                 [0.,0.,0.,1.]])
+    assert np.array_equal(expected_tracking_0, tracking[0])
+    expected_tracking_1 = np.array([[1.,0.,0.,0.],
+                                 [0.,1.,0.,0.],
+                                 [0.,0.,1.,0.],
+                                 [0.,0.,0.,1.]])
+    assert np.array_equal(expected_tracking_1, tracking[1])
+    assert tracking_quality.count(1.) == 2
+
+    (port_handles, time_stamps, frame_numbers, tracking,
+                tracking_quality ) = tracker.get_frame()
+
+    assert len(port_handles) == 2
+    assert len(time_stamps) == 2
+    assert frame_numbers.count(2) == 2
+    expected_tracking_0 = np.array([[1.,0.,0.,15.],
+                                 [0.,1.,0.,-30.],
+                                 [0.,0.,1.,7.5],
+                                 [0.,0.,0.,1.]])
+    assert np.array_equal(expected_tracking_0, tracking[0])
+    assert np.array_equal(expected_tracking_1, tracking[1])
+    assert tracking_quality.count(1.) == 2
+
+    del tracker
+
+def test_getframe_smooth_mock_quat(mocker):
+    """
+    Checks that get frame works with quaternions
+    """
+    tracker = None
+    bxsource = MockBXFrameSource()
+    ndidevice = MockNDIDevice()
+    mocker.patch('serial.tools.list_ports.comports', mockComports)
+    mocker.patch('ndicapy.ndiProbe', mockndiProbe)
+    mocker.patch('ndicapy.ndiOpen', mockndiOpen)
+    mocker.patch('ndicapy.ndiCommand', ndidevice.mockndiCommand)
+    mocker.patch('ndicapy.ndiGetError', mockndiGetError)
+    mocker.patch('ndicapy.ndiClose')
+    mocker.patch('ndicapy.ndiGetPHSRNumberOfHandles',
+            ndidevice.mockndiGetPHSRNumberOfHandles)
+    mocker.patch('ndicapy.ndiGetPHRQHandle', ndidevice.mockndiGetPHRQHandle)
+    mocker.patch('ndicapy.ndiPVWRFromFile')
+    mocker.patch('ndicapy.ndiGetPHSRHandle', mockndiGetPHSRHandle)
+    mocker.patch('ndicapy.ndiVER', mockndiVER)
+    mocker.patch('ndicapy.ndiGetBXFrame', bxsource.mockndiGetBXFrame)
+    mocker.patch('ndicapy.ndiGetBXTransform', bxsource.mockndiGetBXTransform)
+
+    tracker = NDITracker(SETTINGS_POLARIS_QUAT_SMOOTH)
+
+    bxsource.setdevice(ndidevice)
+
+    (port_handles, time_stamps, frame_numbers, tracking,
+                tracking_quality ) = tracker.get_frame()
+
+    assert len(port_handles) == 2
+    assert len(time_stamps) == 2
+    assert frame_numbers.count(1) == 2
+    expected_tracking_0 = np.array([[1.,0.,0.,0.,10.,-20,5.]])
+    assert np.array_equal(expected_tracking_0, tracking[0])
+    expected_tracking_1 = np.array([[1.,0.,0.,0.,0.,0.,0.]])
+    assert np.array_equal(expected_tracking_1, tracking[1])
+    assert tracking_quality.count(1.) == 2
+
+    (port_handles, time_stamps, frame_numbers, tracking,
+                tracking_quality ) = tracker.get_frame()
+
+    assert len(port_handles) == 2
+    assert len(time_stamps) == 2
+    assert frame_numbers.count(2) == 2
+    expected_tracking_0 = np.array([[1.,0.,0.,0.,15.,-30,7.5]])
+    assert np.array_equal(expected_tracking_0, tracking[0])
+    assert np.array_equal(expected_tracking_1, tracking[1])
+    assert tracking_quality.count(1.) == 2
+
+    del tracker
+
+def test_getframe_missing_smooth(mocker):
+    """
+    connects and configures, mocks ndicapy.ndiProbe to pass
+    reqs: 03, 04
+    """
+    tracker = None
+    bxsource = MockBXFrameSource()
+    ndidevice = MockNDIDevice()
+    mocker.patch('serial.tools.list_ports.comports', mockComports)
+    mocker.patch('ndicapy.ndiProbe', mockndiProbe)
+    mocker.patch('ndicapy.ndiOpen', mockndiOpen)
+    mocker.patch('ndicapy.ndiCommand', ndidevice.mockndiCommand)
+    mocker.patch('ndicapy.ndiGetError', mockndiGetError)
+    mocker.patch('ndicapy.ndiClose')
+    mocker.patch('ndicapy.ndiGetPHSRNumberOfHandles',
+            ndidevice.mockndiGetPHSRNumberOfHandles)
+    mocker.patch('ndicapy.ndiGetPHRQHandle', ndidevice.mockndiGetPHRQHandle)
+    mocker.patch('ndicapy.ndiPVWRFromFile')
+    mocker.patch('ndicapy.ndiGetPHSRHandle', mockndiGetPHSRHandle)
+    mocker.patch('ndicapy.ndiVER', mockndiVER)
+    mocker.patch('ndicapy.ndiGetBXFrame', bxsource.mockndiGetBXFrame)
+    mocker.patch('ndicapy.ndiGetBXTransform',
+            bxsource.mockndiGetBXTransformMissing)
+
+    tracker = NDITracker(SETTINGS_POLARIS_SMOOTH)
+
+    bxsource.setdevice(ndidevice)
+    (port_handles, time_stamps, frame_numbers, tracking,
+                tracking_quality ) = tracker.get_frame()
+
+    assert len(port_handles) == 2
+    assert len(time_stamps) == 2
+    assert frame_numbers.count(1) == 2
+    assert np.any(np.isnan(tracking[0]))
+    assert np.any(np.isnan(tracking[1]))
     assert np.all(np.isnan(tracking_quality))
 
     del tracker