Rx Window as it appears at startup with an empty COMS plaque

RXMenuAtStartup

The Prescription window unifies all prescription related functions. Controls are provided to set dose calculation options, the prescription point, date and time of plaque insertion and removal, and a customizable table of central axis (CAX) or tumor axis (TAX) points which are automatically updated.

The buttons along the top of the window provide a quick method of setting most dose calculation options. The plaque insertion and removal calendar controls are used to set the implant duration. The Implant Calculator button in the removal group simplifies calculation of required seed strength or implant duration.

The Rx Menu up on the MacOS menu bar provides additional control over Rx related functions and parameters.

The Rx units button (with popup-menu) along the lower border controls the display units for the prescription.

RxUnitsMenu
Rx Window as it appears with a COMS plaque filled with seeds
RXWindowCOMS

These are the dose calculation parameter button settings for a COMS plaque with a silicone seed carrier. The COMS plaque has a shell with a lip.

  • PS Calculation enabled (vs the obsolete COMS protocol).
  • Linear source mode enabled (vs point source).
  • Anisotropy corrections enabled.
  • Silicone carrier corrections enabled.
  • Gold flourescence corrections disabled (flourescence is absorbed in the COMS carrier).
  • Air scatter corrections disabled.
  • Shell collimation enabled.
  • The seeds are only collimated by the lip (vs by individual slots).

The plaque is loaded with seeds so as to deliver 85Gy to the apex of a 4.5 mm tall equatorial tumor (note that tumor height is measured from the inner sclera) in 7 days (168 hours). The Rx units have been set to Gy. The dashed blue line indicates where the Rx dose falls in the table.

Rx Window as it appears with an Eye Physics plaque filled with seeds
RXWindowEP

These are the dose calculation parameter button settings for an Eye Physics plaque.

  • PS Calculation enabled (vs the obsolete COMS protocol).
  • Linear source mode enabled (vs point source).
  • Anisotropy corrections enabled.
  • Silicone carrier corrections disabled (Eye Physics plaques have no carrier).
  • Gold flourescence corrections enabled.
  • Air scatter corrections disabled.
  • Shell collimation disabled (redundant for a slotted plaque).
  • Slot collimation enabled.

The plaque is loaded with seeds so as to deliver 85Gy to the apex of a 4.5 mm tall equatorial tumor (note that tumor height is measured from the inner sclera) in 7 days (168 hours). The Rx units have been set to Gy. The dashed blue line indicates where the Rx dose falls in the table.

Changing the Rx point in the Rx Window
RxWindowWithRxMenu

The Prescribe to menu sets the dose prescription point. This is generally the apex of the tumor.

Rx Menu | CAX Table Options | Guide Contents