NYU Langone Health

To evaluate the accuracy of the Enhanced Leaf Model (ELM) implemented in Eclipse v18.0 for single-isocenter multiple-target (SIMT) stereotactic radiosurgery (SRS), with emphasis on updated MLC modeling and dosimetric precision.

Prostate High Dose-Rate (HDR) Brachytherapy with Dominant Intraprostatic Lesion (DIL) boost is well tolerated for high-risk patients. Ultrasound-guided prostate HDR is a time-sensitive procedure with treatment planning subject to variability, especially for s...

To quantitatively compare image quality from HyperSight CBCT to dedicated CT Simulation scanners, using a standard image quality phantom and conventional imaging metrics to assess performance differences and their statistical significance.

This work introduces a framework to automate treatment planning of small-volume lattice radiotherapy applied to head and neck malignancies.

To develop and evaluate a film-based picket fence (PF) test and automated analysis for determining multi-leaf collimator (MLC) position accuracy on the Elekta Unity MR-Linac.

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 phantoms. This work characterizes a...

To investigate the role of interplay effects between respiratory motion and proton scanning beam interactions on free-breathing proton lattice radiotherapy (PLT) plans relative to dose distributions from static calculations.

Film is typically read using a flatbed scanner, but these scanners are prone to Type A errors (orientation, placement, etc.). We compare dose calibration of EBT4 radiochromic film from 6MV exposures using a flatbed film scanner and a single-point transmission...

Patient-specific quality assurance (PSQA) for lateral targets on a 1.5T MR-Linac (MRL) is limited by restricted couch motion and lack of dedicated positioning aids for off-axis measurements. While lateral ArcCheck-MR configurations can improve detector covera...

HDR brachytherapy procedures are usually time constrained with planning and safety checks performed immediately preceding delivery, often intraoperatively. Additionally, planning systems can be integrated with oncology information systems (OIS) or standalone...

To evaluate the feasibility of HyperSight CBCT–based radiotherapy planning on the Varian Ethos v2.0 platform and to develop a clinically deployable simulation workflow that overcomes current system limitations.

VMAT based cerebrospinal irradiation (CSI) using photons has emerged as a palliative treatment approach for patients suffering from metastatic leptomeningeal disease. In this work we describe the experience introducing VMAT CSI into clinical use.

To assess the feasibility of distributing the workload of manufacturing 3-dimensional (3D) printed Winston-Lutz (W-L) phantoms for donation purposes across multiple locations and a variety of printers

This study characterized inter-machine variations in physical leaf gaps and associated MLC parameters, including dosimetric leaf gap (DLG) and leaf gap (LG). We provide practical guidance for robust Enhanced Leaf Model (ELM) implementation through physical le...

Oncology information system (OIS) and Treatment planning system (TPS) upgrades are high-impact events that require comprehensive validation. Knowing what to prepare, who to involve, and what to test on go-live day is critical for patient safety and clinical c...

Therapy Physics

In-vivo dosimetry requires compact dosimeters suitable for patient placement, with multiple detectors often deployed simultaneously for spatial sampling. The 2023 nanoDot OSLD recall left many clinics without accessible, low-cost alternatives. Our purpose is...