The generation of intensity-modulated fields for conformal radiotherapy by dynamic collimation

Convery, D.; Rosenbloom, Mike

doi:10.1088/0031-9155/37/6/012

“…In dynamic mode the opposing leaves of the MLC move simultaneously and with different velocity to generate the desired intensity. The first known paper on dynamic collimation of leaves was published by Convery and Rosenbloom (1992). They introduced an algorithm that employs a continuous unidirectional sweep of the independently controlled MLC leaves.…”

Section: The Realization Problemmentioning

confidence: 99%

Mathematical optimization in intensity modulated radiation therapy

Ehrgott

¹

,

Güler

²

,

Hamacher

³

et al. 2009

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The design of an intensity modulated radiotherapy treatment includes the selection of beam angles (geometry problem), the computation of an intensity map for each selected beam angle (intensity problem), and finding a sequence of configurations of a multileaf collimator to deliver the treatment (realization problem). Until the end of the last century research on radiotherapy treatment design has been published almost exclusively in the medical physics literature. However, since then, the attention of researchers in mathematical optimization has been drawn to the area and important progress has been made. In this paper we survey the use of optimization models, methods, and theories in intensity modulated radiotherapy treatment design. This is an updated version of the paper that appeared in 4OR, 6(3), 199-262 (2008).

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“…Their close-in method does not require beam off periods as opposed to the method of Convery and Rosenbloom (1992) and uses the ideas from Källman et al (1988). Svensson et al (1994) compare mathematically the treatment times of close-in and sweep techniques they present and conclude that both techniques result in similar treatment times.…”

Section: Unconstrained Dynamic Multileaf Collimationmentioning

confidence: 99%

Mathematical optimization in intensity modulated radiation therapy

Ehrgott

¹

,

Güler

²

,

Hamacher

³

et al. 2008

4OR

View full text Add to dashboard Cite

The design of an intensity modulated radiotherapy treatment includes the selection of beam angles (geometry problem), the computation of an intensity map for each selected beam angle (intensity problem), and finding a sequence of configurations of a multileaf collimator to deliver the treatment (realization problem). Until the end of the last century research on radiotherapy treatment design has been published almost exclusively in the medical physics literature. However, since then, the attention of researchers in mathematical optimization has been drawn to the area and important progress has been made. In this paper we survey the use of optimization models, methods, and theories in intensity modulated radiotherapy treatment design.H.W. Hamacher and Ç.

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“…These conformal techniques include proton or charged-particle RT, 26 3-D conformal photon RT, 20 IMRT, 27 and stereotactic radiotherapy 28 or stereotactic radiosurgery. 29 From a technical perspective, it is worth noting that many specialized devices for radiosurgery have maximum collimator sizes of ≤6 cm, which limits their utility for treatment of many primary sarcomas.…”

Section: Conformal Radiotherapymentioning

confidence: 99%