Plaque Location Window

In the plaque location window you can precisely position and orient the plaque and its carrier (if it has one). In most circumstances it is easier to position and orient the plaque by simply clicking & dragging it in the Patient Setup and Retinal Diagram windows. The Center button in the Retinal Diagram window automatically centers and spins the plaque (ie sets the tilt angle) to balance the suture eyelets. Eyelet balancing is explained below. Orientation controls for the carrier are also available in the Plaque window.

From the Setup Menu select.

PlaqueLocation
plaque location

  • Rotations about eye axes group
    • Z axis - rotates the plaque around the eye's Z axis.
    • Y axis - rotates the plaque around the eye's Y axis.
  • Rotations about plaque center group
    • Tilt - spins the plaque about its own center.
      RotatingPlaque

      Note: the plaque spin controls in the Patient Setup and Retinal Diagram windows also adjust plaque tilt.

      RotatingPlaque
    • Balance - spins the plaque to make a designated pair of suture eyelets equidistant from the limbus. The pair of balancing eyelets is selected in the Eyelet Editor window when creating a plaque model.
  • Carrier rotation group
    • Carrier angle - rotates the carrier within the plaque.
    • Lock carrier - locks the carrier to prevent rotation.
  • Copy location group
    • From plaque - Duplicates the location and rotational orientation parameters of the indicated plaque.
    • Include offset settings - If enabled, also duplicates the scleral offset, angular wobble and other parameters described in the Plaque Offset Window.
  • Center plaque on group
    • Center on Tumor Base - centers the plaque under the currently active tumor base.
    • Center on Tumor Apex - centers the plaque under the currently active tumor apex.
    • Posterior Pole - centers the plaque under the posterior pole.
    • Anterior Pole - centers the plaque over the anterior pole.
    • Point of Interest - centers the plaque under the selected user defined point of interest (POI). Select a POI from the menu just below the button. The button and menu will enable once POI exist. You can create POI on the retinal diagram (and in the planar dosimetry window) when in POI cursor mode.
  • Location group
    • Unknown - Tags the plaque location as unknown. Check this box when planning without advance knowlege of the tumor location or eventual plaque location. In this case dosimetry is simply plaque-relative and dose to off-axis ocular locations (e.g. fove or optic disc) can not be determined.
    • Lock location - Locks the plaque location to prevent accidental movement.