anchor.diff:                      slider.qi-slider(ng-model="image.xtkVolume.indexZ"
                                        floor='0' ceiling='118' step='1')
               div(ng-controller='AccordionGroupCtrl')
  -              uib-accordian-group(is-open="isOpen")
  +              uib-accordion-group(is-open="isOpen")
                   +accordion-heading('Threshold')
                   .row
                     .col-md-3.qi-slider-label Lower
  
positive.code:             slider.qi-slider(ng-model="sliceZ"
                               floor='0' ceiling='118' step='1')
      div(ng-controller='AccordionGroupCtrl')
        uib-accordian-group(is-open="isOpen")
          +accordion-heading('Opacity')
          // The overlay opacity control.
          // Note: This control has been modified to interact with the
  
negative.code:         //                         precision='1')
          //
              div(ng-controller='AccordionGroupCtrl')
                uib-accordion-group(is-open="isOpen")
                  +accordion-heading('Cross Section')
                  .row
                    .col-md-3.qi-slider-label Sagittal
  