Data of : Multi-institutional study on image quality for a novel CBCT solution on O-ring linac.

Data of "Multi-institutional study on image quality for a novel CBCT solution on O-ring linac". This work presents a multi-institutional study on image quality provided by a novel cone beam computed tomography (CBCT). The main goal is to investigate the consistency of imaging performance across multiple institutions. Methods: Phantoms for measuring relative electron density (RED) and image quality were sent to six institutions for imaging on Ethos and Halcyon units equipped with HyperSight CBCT. The imaging protocols included tube potential from 100 to 140 kVp and exposure from 80 to 800 mAs. Imaging performance was evaluated with regard to RED versus Hounsfield Units (HU), uniformity, contrast-to-noise ratio (CNR), slice thickness, circular symmetry, Modulation Transfer Function (MTF), and spatial resolution (among other parameters).