ArticleCureus2025
Significances of Collimator Angle Rotation and Different Angle Combinations in Volumetric-Modulated Arc-Based Stereotactic Radiosurgery With 5-mm Leaf-Width Multileaf Collimator for Single Brain Metastases.
Article in Cureus, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.
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1 citing paper in PubMed.
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2 authors.
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No grant is acknowledged in the PubMed record.
Abstract
Purpose In linac-based stereotactic radiosurgery (SRS) using a multileaf collimator (MLC) for multiple brain metastases (BMs), the appropriate MLC angle rotation is useful to minimize the intervening brain dose by avoiding island blocking between the lesions localized along the direction of leaf movement. However, in some linac systems, the MLC angle cannot be rotated, or the cephalad rotation range of non-coplanar arcs (NCAs) is severely limited. In addition, the significance of MLC angle rotation has yet to be clarified in SRS for single BMs. This planning study was therefore conducted to investigate the significances of MLC angle rotations and the different angle combinations in SRS with a 5-mm leaf-width MLC for single BMs using volumetric-modulated arcs (VMA) consisting of one coplanar arc and two NCAs rotated 60º cranially. Materials and methods The study subjects were 30 lesions in 27 patients with the gross tumor volume (GTV) ranging from 0.08 cc to 48.09 cc (median 9.81 cc). Four VMA-based SRS plans were created for each GTV using an Agility
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