PSI2CAD Interface

Jürgen SalkUniversity of Ulm

Germany

Features• ANSI C

• runs on command line

• platform independent i/o routines, i.e. runs on Intel x86 (Windows, Linux, little endian) via SAMBA/NFS and on PA -RISC (HP-UX, big endian)

• implemented as plugin for CadPlan GUI (by means of korn-shell wrapper script)

Features (cont´d)

• Online help (-h Option)

• Verbose mode (-v option) to trace problems

• Trim dose matrix to body contour (-t Option)

• Automatically checks for valid filenames

• Easy installation and simple usage

• It´s small

Commandline options

Usage as CadPlan pluginStep 1

• Add a new plan

• Add dummy field

• Select resolution of dose matrix

Usage as CadPlan pluginStep 2

• Store selected parameters as new plan

Usage as CadPlan pluginStep 3

• Run psi2cad as User Command from the Tools pulldown menu

Usage as CadPlan pluginStep 4

• Check messages displayed in info box

Usage as CadPlan pluginStep 5

• Reload plan for imported dose matrix

Usage as CadPlan plugin

• Once imported to CadPlan the externally calculated plan can be reviewed like any other locally calculated treatment plan

Compare plans by images

Compare plans by images (cont´d)

Compare plans by images (cont´d)

Compare plans by dose volume histograms

Compare plans by dose volume histograms

(cont´d)

3D reconstructions

Resolution issues

• The CadPlan dose grid is fixed to a maximum number of 160112 grid points, i.e. the maximum size of the dose matrix depends on the grid spacing

• Reduction of grid spacing (e.g. from 2.5 mm to 1.25 mm) may lead to incomplete coverage of the regions of interest

Resolution issues (cont´d)

• If necessary redefine the center of the calculation area to cover regions of interest

Resolution issues (cont´d)

• Store the new grid spacing/calculation area as a new plan

Resolution issues (cont´d)

• Perform steps 3-5 as described above to import the externally calculated dose matrix with high resolution grid spacing.

• psi2cad will automatically detect the new grid and offset of the calculation area

Have fun. ;-)