Abstract

Dosimetric Study on the Consequences of Replacing the mMLC Collimator Used for Intracranial SRS by an Integrated MLC-160

Highlights

  • Stereotactic Radiosurgery (SRS) is a treatment technique characterized by the administration of high doses of radiation in a single fraction with high accuracy to a small and well-defined intracranial target, while limiting the dose to surrounding normal tissues [1].In the early development of linear accelerator-based (LINAC)systems, circular collimators of different diameters coupled to the LINAC were used and the SRS treatment was performed with multiple convergent and non coplanar arcs [2,3]

  • The characteristics associated with the multileaf collimator (MLC)-160 system contributed to a poorer dose conformity, mainly for irregular shaped or small lesions and for lesions at close proximity to organs at risk (OARs)

  • The mMLC associated with the dynamic arc technique yields dosimetric benefits in radiosurgery

Read more

Summary

Introduction

Stereotactic Radiosurgery (SRS) is a treatment technique characterized by the administration of high doses of radiation in a single fraction with high accuracy to a small and well-defined intracranial target, while limiting the dose to surrounding normal tissues [1].In the early development of linear accelerator-based (LINAC)systems, circular collimators of different diameters coupled to the LINAC were used and the SRS treatment was performed with multiple convergent and non coplanar arcs [2,3]. Et al [7] analysed the impact of the MLC leaf width on stereotactic radiosurgery and 3D conformal radiotherapy treatment plans, using 1.7, 3 and 10 mm leaf width MLC systems. They showed that for radiosurgery treated lesions, the 1.7 and 3 mm leaf width allowed to comply the RTOG treatment planning guidelines for SRS, in most cases. Tanyi, et al [10] performed a dosimetric comparison between MLC systems with 2.5 mm and 5 mm leaf width for the SRS treatment of 68 intracranial lesions and demonstrated small dosimetric benefits of the 2.5 mm leaf width MLC system over the 5 mm leaf width system

Objectives
Methods
Results
Discussion
Conclusion
Full Text
Paper version not known

Talk to us

Join us for a 30 min session where you can share your feedback and ask us any queries you have

Schedule a call

Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.