     highlightBolusArrival = (session, chart) ->
       # If the bolus arrival index is zero, then it does not have
       # have a tick mark, so bail.
-      if not session.bolus_arrival_index
+      if not session.bolusArrivalIndex
         return
       # Select the SVG element.
       svg = d3.select(chart.container)

      registration_data_series = (registration, index) ->
        # The registration image select button colors.
        COLORS = ['LightGreen', 'LightYellow', 'LightCyan', 'LemonChiffon']
      
        key = registration.title
      
        # TODO - Wrap the key in a registration parameters pop-up hyperlink.
        # Return the data series format object.
        key: key

define ['angular', 'chart'], (ng) ->
  intensity = ng.module 'qiprofile.intensity', []

  intensity.factory 'Intensity', ->
    # Highlights the bolus arrival tick mark. The bolus arrival is
    # only highlighted if it occurs after the first series.  
    #
