Library
2869 entries curated across talks and posters.
Pediatric craniospinal irradiation (CSI) autosegmentation is challenging due to small, age-variable anatomy. Performance of a pediatric-trained in-house pipeline was compared with atlas-based and commercial AI methods for pediatr...
Traditional patient-specific QA in proton therapy requires detector-based measurements that consume beam time and delay workflow. This study presents a calibration-based machine log analysis system enabling automated, measurement...
It is mandatory for staff involved in fluoroscopy to wear dosimeter badges to track their radiation dose. However, staff compliance can be inconsistent and challenging to monitor. We investigated the correlation between the dose...
To test the hypothesis that geometric metrics measured by the enhanced-couch Machine Performance Check (MPC) can serve as a surrogate to predict off-axis isocentricity failure.
Anatomical variations during photon radiotherapy often cause discrepancies between planned and delivered doses. This study evaluates the clinical utility of combining EPID-based transmission in vivo dosimetry (IVD) with daily con...
This study investigates the feasibility of VMAT treatments on the MR-Linac by comparing planned and measured quality and deliverability of investigational VMAT plans with existing clinical IMRT plans to determine whether VMAT can...
The accurate estimation of patient entrance skin dose (ESD) is an important part of diagnostic radiology quality assurance. ESD is commonly calculated by measuring incident (scatter‑free) air kerma on a PMMA phantom and applying...
We compared carbon-ion vs. photon lattices spatially fractionated radiotherapy on identical tumor geometries and developed a 3D vertex-optimization that steers high- linear energy transfer (LET) spots into pre-defined peaks to ma...
Extravasation during radiopharmaceutical therapy can retain a substantial fraction of administered activity at the injection site, creating high local absorbed doses and potential tissue injury while reducing delivery to target t...
Cone-beam CT (CBCT) acquired on the linear accelerator is being increasingly used beyond image guidance to support simulation and treatment planning workflows. This work reports the clinical implementation, challenges, and soluti...
While hypofractionation and dose escalation may provide enhanced tumor control in locally advanced lung cancer, previous attempts generally increase toxicity (e.g., esophagitis and/or pneumonitis). We present an approach leveragi...
To quantify the efficacy of CBCT-guided external beam online adaptive radiotherapy (oART) compared to conventional cervical cancer treatment methods, and to determine the impact of intrafraction anatomical motion on dosimetry.
Cone-beam CT (CBCT) is integral to modern radiotherapy workflows; however, limited soft-tissue contrast and imaging artifacts restrict its quantitative use, particularly for online auto-segmentation in CBCT-guided adaptive radiot...
MC simulations were used to accurately determine the water-equivalent thickness (WET) of the buildup housing, the effective point of measurement (EPOM), and the proton- and chamber-specific factor fQ, the MC-derived component of...
Congenital heart defects are the most common type of birth defect, and their management often requires lifelong medical care. Interventional cardiology procedures frequently rely on imaging modalities that use ionizing radiation,...
Modern radiation therapy incorporates advanced technologies including surface guidance, 6DoF couches, SRS, and combined-axis delivery. Traditional QA programs test these capabilities in isolation using multiple independent phanto...
To characterize surface Cherenkov emission as a function of photon beam energy and dose rate, and to investigate the feasibility of Cherenkov imaging for radiation field size verification using EPID measurements as a reference fo...
To quantify radiotracer- and reconstruction-dependent feasibility of delayed PET imaging on a long axial field-of-view (LAFOV) system, and to identify pediatric-relevant delayed imaging windows (or equivalent low-activity protoco...
An improved imager and software (HyperSight on a Varian TrueBeam linac) feature a larger detector panel and increase the maximum gantry rotation speed for CBCT imaging to 1.5 revolutions per minute (rpm). While enabling faster ac...
To validate the Exradin W2 plastic scintillator for measuring beam profiles in Leksell Gamma Knife (LGK) quality assurance and to compare its characteristics against MicroDiamond detector measurements as a filmless QA alternative.
In head-and-neck (H&N) cancer radiotherapy, using IMRT and VMAT, treatment evaluation relies primarily on dose–volume histograms DVH. While effective for quantifying dose magnitude, DVH discard spatial information that may be cri...
Accurate absorbed dose estimation is essential for radiotherapy and research. In ultra-high dose-rate (FLASH) beams, ~Gy doses are delivered in a few pulses, so small perturbations can bias monitoring. Beam current transformers (...
To compare digital coincidence detection (DCD) with analog charge summation (ACS) for a cadmium zinc telluride (CZT) photon counting detector (PCD) and evaluate the impact on spatial resolution in PCD computed tomography (CT) as...
Ethos Version 2 has several new capabilities, including high-fidelity (HF) adaptive planning, AI-based auto-segmentation, and dose calculation using HyperSight CBCT. This study evaluates these new features for online adaptive rad...