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IMRT QA Equipment : Inhomogeneity Phantom

Inhomogeneity Phantom Inhomogeneity Phantom
Inhomogeneity phantom mimicking body like inhomogeneities for dose measurement
  • Inserts are mimicking tissue, bone, lung
  • Dose measurement with ionization chamber, film or 2D-Array seven 29
  • Inserts fit into a slab phantom
The IMRT Inhomogeneity Phantom is used to verify basic data of a radiotherapy treatment planning system (TPS). The corrections of the TPS for inhomogeneities are verified by the phantom.

The IMRT Inhomogeneity Phantom is composed of a base plate and five inserts of four different materials Three inserts are mimicking inhomogeneities in the human body (1 x bone, 1 x tissue, 1 x lung). Two inserts are made of acrylic glass (PMMA).

The phantom can be placed on the bottom part of the PTW Universal IMRT Phantom for use with film or ionization chambers, or on the PTW 2D- Array seven 29, or it can be placed on a 30 cm x 30 cm slab phantom.

The size of the Inhomogeneity Phantom is 30 cm x 30 cm 0 2.5 cm. The inserts can be exchanged according to the users requirements. The IMRT Inhomogeneity Phantom is not a CT test phantom. The Hounsfield units of the phantom must be determined by CT scan.

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