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Docket #: S00-170

Method of Monitor unit (MU) calculation for intensity modulated photon field

Researchers in Prof. Lei Xing's laboratory have developed a simple and efficient method for MU calculation for intensity modulated beams. In Intensity Modulated Radiation Therapy (IMRT), a pressing issue is how to efficiently verify the MU calculation of the treatment planning system. This technology expresses the dose at a spatial point as a summation of the contributions from all beamlets, each being modulated by a dynamic modulation factor. The approach is independent of leaf sequence algorithms and delivery machines and its effectiveness was demonstrated by using several IMRT cases.

Applications

  • IMRT - the technique can be used as a redundant check of IMRT treatment plans from an inverse treatment planning system

Advantages

  • Low cost, easy to use, simple implementation
  • Versatile - handles a variety of clinical situations, including off-axis dose calculation, inhomogeneous media, low dose region, patient contour variation
  • Expandable - to deal with a variety of IMRT techniques, including MLC based IMRT, MIMiC, Tomotherapy and intensity modulated arc therapy.

Publications

Patents

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