     # The common modeling x-axis specification.
     x =
       label: 'Visit Date'
-      accessor: (session) -> session.acquisition_date.valueOf()
+      accessor: (session) -> session.acquisitionDate.valueOf()
 
     # The chart-specific y-axis specifications.
     y =

            {
              label: 'FXL Ktrans'
              color: 'BurlyWood'
              accessor: (session) -> session.modeling.fxl_k_trans
            }
            {
              label: 'FXR Ktrans'
              color: 'OliveDrab'
              accessor: (session) -> session.modeling.fxr_k_trans
            }
          ]
      ve:

              (current - previous)/previous * 100
          
            # Return an object with the change properties.
            deltaKTrans_pct_change: percent_change(current.deltaKTrans, previous.deltaKTrans)
            fxlKTrans_pct_change: percent_change(current.fxlKTrans, previous.fxlKTrans)
            fxrKTrans_pct_change: percent_change(current.fxrKTrans, previous.fxrKTrans)
            v_e_pct_change: percent_change(current.v_e, previous.v_e)
            tau_i_pct_change: percent_change(current.tau_i, previous.tau_i)
        
