anchor.diff:  .qi-panel.qi-vol-ctl
     uib-accordion(close-others='false')
       div(ng-controller='AccordionGroupCtrl')
  -      uib-accordian-group(is-open="isOpen")
  +      uib-accordion-group(is-open="isOpen")
           +accordion-heading('Time Series')
           // The time series control.
           .row
  
positive.code:                     slider.qi-slider(ng-model="image.xtkVolume.indexZ"
                                       floor='0' ceiling='118' step='1')
              div(ng-controller='AccordionGroupCtrl')
                uib-accordian-group(is-open="isOpen")
                  +accordion-heading('Threshold')
                  .row
                    .col-md-3.qi-slider-label Lower
  
negative.code:             slider.qi-slider(ng-model="timeSeries"
                               floor='1' ceiling='32' step='1')
      div(ng-controller='AccordionGroupCtrl')
        uib-accordion-group(is-open="isOpen")
          +accordion-heading('Slices')
          // The axis cross section (slice) controls.
          .row
  