IMRT-Phantom EASY CUBE – Equipment


Modern development is flexible. EASY CUBE – a modular equipment solution

More possibilities in dosimetry:
By its modular design the EASY CUBE not only provides the facility of using ready packed films. Besides it has adapters for different ionization chambers (Farmer, Pin Point) so that also absolute dose measurements can be accomplished. Further plates of water-equivalent RW3 were provided with hole drillings for TLD (Thermoluminescent Dosimeter), so that also these dosimeters are applicable with the phantom. Markers in different colors are engraved on the surface of the EASY CUBE for plain adjustment of the phantom under an accelerator and in a CT scanner. Optionally, a set of localizer plates is available for the use in a CT scanner.

More anatomical simulation practicabilities:
The cubical “basic phantom” is specifically designed for head and neck and stereotactic applications. We accomplished that the spectrum of use of the EASY CUBE could be economically expanded by consistent advancement with numerous “anatomical” extensions: Now also dose distributions within the range of the basin can be examined, in order to be able to verify e.g. fluence-modulated irradiation within the range of the prostate. The EASY CUBE was extended in such a way that also circular body cross sections and inhomogeneities can be emulated. This was realized by the development of half shells of RW3, which can be attached with the help of appropriate expanders laterally to the phantom. They contain recesses, which can be filled with dosimeters or other phantom materials. This structure can be used in particular for the simulation of dose distributions in the range of the basin or the thorax.

With the various extensions, dose distributions cannot only be simulated and measured within the range of materials of high density, e.g. bones, but the inhomogeneities can also be used in order to calibrate the conversion of the Hounsfield values of a CT-scanner into values of physical density: The half shells can be joined with adapters to a cylinder. So on the one hand a round patient cross section can be simulated – and on the other hand, by filling with inhomogeneities, a calibration of the conversion of measured Hounsfield values to values of the physical density can be made. For this appropriate materials are available, similar to fat, muscle, lung and bone fabrics.

For the simulation of large cylindric geometry further adapters of RW3 are available, which permit equal measurements with dosimeters or inhomogeneities. With these phantom extensions naturally occurring or artificial inhomogeneities in patient anatomy, e.g. bones or metal prostheses within the range of the hip, can be simulated.