Radiation therapy system and method of using the same

Details Radiation therapy system and method of using the same Radiation therapy system and method of using the same

2007-11-13

2007-11-13

Glick, Edward J. (Department: 2882)

X-ray or gamma ray systems or devices

Specific application

Absorption

Reexamination Certificate

active

11249619

ABSTRACT:
A method of using a radiation system having a multileaf collimator (“MLC”) to adjust for unevenness in the radiation emitted by the system is disclosed. By appropriately controlling the MLC in accordance with the invention the system can be operated without a flattening filter. In addition, the invention allows the system user to vary the radiation beam energy in the course of a single treatment, without the need to use or change flattening filters. A map of the uneven radiation beam intensity in the treatment area is obtained, and the map information is combined with a treatment plan to control movement of the leaves of the MLC such that each area receives the correct radiation dose.

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Rosello et al., “Virtual wedge dosimetric behavior with Monitor Units number”, 2000, Proceedings of the 22ndAnnual EMBS International Conference, pp. 2200-2201.

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