diff --git a/heudiconv/bids.py b/heudiconv/bids.py
index ce8ab4c3..4647358b 100644
--- a/heudiconv/bids.py
+++ b/heudiconv/bids.py
@@ -404,10 +404,10 @@ def get_formatted_scans_key_row(dcm_fn):
     """
     dcm_data = dcm.read_file(dcm_fn, stop_before_pixels=True, force=True)
     # we need to store filenames and acquisition times
-    # parse date and time and get it into isoformat
+    # parse date and time of start of run acquisition and get it into isoformat
     try:
-        date = dcm_data.ContentDate
-        time = dcm_data.ContentTime
+        date = dcm_data.AcquisitionDate
+        time = dcm_data.AcquisitionTime
         acq_time = get_datetime(date, time)
     except (AttributeError, ValueError) as exc:
         lgr.warning("Failed to get date/time for the content: %s", str(exc))
diff --git a/heudiconv/tests/test_main.py b/heudiconv/tests/test_main.py
index 924295ca..e696b991 100644
--- a/heudiconv/tests/test_main.py
+++ b/heudiconv/tests/test_main.py
@@ -171,7 +171,7 @@ def test_get_formatted_scans_key_row():
 
     row1 = get_formatted_scans_key_row(dcm_fn)
     assert len(row1) == 3
-    assert row1[0] == '2016-10-14T09:26:36.693000'
+    assert row1[0] == '2016-10-14T09:26:34.692500'
     assert row1[1] == 'n/a'
     prandstr1 = row1[2]