Calculating the probability of rectal grade ≥2 proctitis from prostate radiotherapy using the LKB NTCP model:
Instructions for example case
Export the differential DVH from your treatment planning system (TPS) into a Microsoft Excel-readable tabular format (e.g. comma separated value [*.csv])
Copy and paste the DVH for the rectum into the OAR_DVH worksheet in RADBIOMOD.
Click the “Open Form” button
Click the “Lyman-Kutcher-Burman” tab
Click on the “Enable” radio button under “Calculate NTCP with biological parameters”
Either select “Rectum” from the “Model parameters” dropdown menu, or enter your own LKB model parameters
Tick the “Include chart in model calculation” tickbox
Click on “Calculate NTCP”