CyberknifeMUCalc is a cross platform Excel spreadsheet which initiates an ftp login to the Accuray CKS workstation.

On my MacOSX systems, I use Interarchy as my ftp file transfer program. Use whatever ftp file transfer program you like best if you use a Windows PC. Using the ftp transfer program, copy the appropriate .inv_plnfl created by the treatment planning system (TPS) over to your Mac or PC. In the examples below the file "jun1004.inv_plnfl" was loaded.

The spreadsheet analyzes the .inv_plnfl. It recalculates MU using independent copies of the TMR, output factor (OF) and off-axis (OAR) tables from the SGI TPS which are stored within the spreadsheet. Every nonzero beam whose radius is within the bounds of the OAR table is tested and then the beam with the smallest off-axis radius which delivers some user specified minimum number of monitor units (MU) is extracted. The MU calculated by the Cyberknife TPS and the spreadsheet for the smallest radius beam should agree to within 5%. A plot and statistics for all MU ratios are also provided. Click on the screen capture thumbnails below to download full size images.

Click here to download the spreadsheet, sample beam_data and some sample inv_plnfl files: Cyberknife MU Calculator, last updated 7/26/04.

MacOSX	Windows XP

This is the main QA calculation sheet. First, use the ftp link to login to the CKS and then copy the appropriate .invplnfl to your PC. Then use the macro buttons on this sheet to open the copy of the .invplnfl that is now on your PC and to print a formatted QA document.

MacOSX	Windows XP

This is the Plot sheet which graphs MU ratios for all of the beams. You can print this sheet using any of the conventional Excel print commands.

MacOSX	Windows XP

This is the TPR table sheet. The TPR and other physics data are automatically copied from the data files on the CKS workstation and installed into this sheet using the macro linked buttons on the Data sheet. You can also edit these data manually should you ever need to.

MacOSX	Windows XP

This is the output factor sheet.

MacOSX	Windows XP

This is one of the 12 OAR table sheets.

MacOSX	Windows XP

This is the Constants sheet in which you enter the IP address of your SGI server workstation.

MacOSX	Windows XP

This is the invplnfl sheet into which the inv_plnfl being analyzed is loaded.
MacOSX	Windows XP

This is an example of how files should be organized on your Mac or PC. The beam_data folder (and all its contents) should be copied from the SGI server to your PC and stored in the same folder as the QA spreadsheet.