Radiation Therapy Beam Modulation Techniques
The label conformal therapy has been applied to a wide variety of three-dimensional treatment planning and delivery procedures. The original concept for conformai therapy was to limit the normal tissue dose by conforming the treatment field to the beam’s-eye view (BEV) projection of the target volume under continuous rotation of the gantry . A multileaf collimator (MLC) is generally used to efficiently collimate the multiple fields. Initial clinical trials are in progress with a form of fixed-field conformai therapy that relies on BEV field shaping of six or more fixedgantry fields to reduce the volume of normal tissue irradiated around a target volume [2–4].
KeywordsMonitor Unit Multileaf Collimator Gantry Angle Leaf Pair Conformal Therapy
Unable to display preview. Download preview PDF.
- 1.Takahashi S. 1965. Conformation radiotherapyrotation techniques as applied to radiography and radiotherapy of cancer. Acta Radiol Suppl 242:1–142.Google Scholar
- 2.Leibel SA, Heimann R, Kutcher GJ, Zelefsky MJ, Burman CM, Melian E, Orazem J, Mohan R, Losasso TJ, Lo H-C, Wiseberg HA, Chapman DS, Ling CC, Fuks S. 1994. Three-dimensional conformai radiation therapy in locally advanced carcinoma of the prostate: Preliminary results of a phase I dose-escalation study. Int J Radiat Oncol Biol Phys 48:55–56.CrossRefGoogle Scholar
- 9.Carol MP. 1992. An automatic 3-D treatment planning and implementation system for optimized conformai therapy by the NOMOS Corporation. Int J Radiat Oncol Biol Phys 23: 1081.Google Scholar
- 11.Boyer AL, Desobry GE, Wells NH. 1992. Potential applications of invariant kernel conformal therapy. In Breit A, ed. Tumor Response and Treatment Planning. Berlin: Springer-Verlag.Google Scholar
- 13.Söderström S, Brahme A. 1995. Which is the most suitable number of photon beam portals in coplanar radiation therapy? Int J Radiat Oncol Biol Phys.Google Scholar