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Varian Imaging Laboratory

Rank #154 · 6 unique linked submissions.

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Poster Poster Program
Metal Artifact Reduction for Radiotherapy CBCT By MV-to-Kv and Kv/MV-to-Kv Image Conversion

Cone beam CTs at typical kV energies exhibit metal artifacts in IGRT patients with metal prosthetics. MV-CBCT, available on some linacs, reduces artifacts at the expense of soft tissue contrast-to-noise (CNR). As a remedy, we propose an AI network to convert...

Mathias LehmannPascal HuberRony FueglistallerMathias StammeierRaphael BrueggerPablo Corral Arroyo, PhD
Therapy Physics
Poster Poster Program
Truebeam Hypersight Hounsfield Unit Accuracy for Dose Calculation

To evaluate the dosimetric accuracy of plans calculated on the Varian TrueBeam HyperSight cone beam CT (CTHS) imager upgrade compared to current fan beam simulation CT (CTSim) solutions towards online adaptive radiotherapy.

Mathias LehmannVera Birrer
Therapy Physics
Poster Poster Program
Unlocking on-Board Dual-Energy: Fast & Robust Material Decomposition for the Kv Dual-Layer Imager

Conventional dual-energy material decomposition methods suffer from significant noise amplification, which limits their clinical utility for tasks such as intra-fraction markerless tumor tracking. This study introduces PRISM, an open-source Julia framework sp...

Pablo Corral Arroyo, PhDRaphael BrueggerMathias StammeierRony Fueglistaller, PhDMathias LehmannVera Birrer
Therapy Physics
Paper Proffered Program
Design Optimization for Enhanced Energy Separation In a Kv Dual-Layer Imaging

Dual-layer imagers (DLIs) enable simultaneous acquisition of low- and high-energy images in a single exposure, offering detector-based spectral imaging capability for the on-board kV imaging systems of conventional linear accelerators towards avoiding motion...

Mathias StammeierRony FueglistallerMathias LehmannVera BirrerPablo Corral Arroyo, PhDRaphael Bruegger
Therapy Physics
Paper Proffered Program
Combined Dual-Layer Imager and Fast Kv-Switching Improves Linac Spectral Onboard Imaging

Spectral imaging confers several benefits such as material decomposition, increased soft tissue contrast, and metal artifact reduction. Novel methods currently under evaluation for adoption to linac onboard imaging include a kV dual-layer imager investigated...

Rony FueglistallerVera BirrerPablo Corral Arroyo, PhDMathias StammeierMathias LehmannRaphael Bruegger
Therapy Physics