1.8 Conclusion
Intensity-modulated photon beams can be used to obtain homogeneous concave dose distributions. They allow the creation of intentionally non-homogeneous dose distributions for the prescription of multiple dose levels to be delivered during the same fraction. Dose gradients can be delivered with controlled steepness and location. Unwanted dosimetrical effects of loss of electron equilibrium near interfaces between lower and higher density tissues can be counteracted by IMRT but the appropriate planning technology is not generally available yet. Simple and straightforward is the use of intensity-modulated beams for missing tissue compensation. Dose distributions can be generated to match brachytherapy or electron beam plans. Mixed intensity and energy modulated electron-photon beams with steep dose-fall off and sharp depth-independent penumbra can be created.
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De Neve, W. (2006). Rationale of Intensity Modulated Radiation Therapy: A Clinician’s Point of View. In: Bortfeld, T., Schmidt-Ullrich, R., De Neve, W., Wazer, D.E. (eds) Image-Guided IMRT. Springer, Berlin, Heidelberg. https://doi.org/10.1007/3-540-30356-1_1
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