Assessing Focal Spot Alignment in Clinical Linear Accelerators: A Comprehensive Evaluation with Triplet Phantoms
Hans Lynggaard Riis,
Kenni Højsgaard Engstrøm,
Luke Slama
et al.
Abstract:Purpose
A fundamental parameter to evaluate the beam delivery precision and stability on a clinical linear accelerator (linac) is the focal spot position (FSP) measured relative to the collimator axis of the radiation head. The aims of this work were to evaluate comprehensive data on FSP acquired on linacs in clinical use and to establish the ability of alternative phantoms to detect effects on patient plan delivery related to FSP.
Methods
FSP measurements were conducted using a rigid phantom holding two bal… Show more
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