Mary Bird Perkins Cancer Center

MRI guided Adaptive Radiation Therapy (MRgART) allows for daily plan adaptation to the patient’s anatomy. This is achieved by imaging the patient before each fraction, editing the contours to the new anatomy, and adapting the plan to the new contours. However...

To quantify the impact of daily MR-guided adaptive replanning for prostate SBRT on protocol dose-constraint fulfillment, compared with non-adapted reference SBRT plans recalculated on daily anatomy, using both constraint-level pass/fail classification and the...

To evaluate the longitudinal dosimetric and mechanical performance of the Elekta Harmony LINAC over its first year of clinical use in our center.

This session will feature 3-5 presentations from ACR member-volunteers who lead ACR committees or programs. At present, the following initiatives are likely to be useful as presentations to the audience at AAPM 2026. The ACR continues to develop a pathway in...

This work aims to quantify RF-induced heating and local SAR distributions near passive metallic implants within the Elekta Unity. Given the system operates in First Level Mode (4W/kg wbSAR) and the prevalence of implants in the MR-guided adaptive radiotherapy...

The increase of prostheses in patients throughout the years has resulted in different strategies to alleviate streaking artifacts in CT scans that obscure nearby anatomy and complicate treatment planning. Manual density overrides can be time-intensive while a...

To develop and implement an automated quality assurance application for radiation therapy treatment plan verification following AAPM TG-275 guidelines, enabling comprehensive comparison between Elekta Monaco treatment planning system (TPS) and MOSAIQ oncology...

To evaluate the motion measurement accuracy of transverse and coronal 3D stack-of-stars MR sequences relative to 4D-CT and physical ground truth, using a phantom undergoing hysteretic and non-hysteretic 3D sinusoidal motion.

To improve immobilization of Gamma Knife patients' heads by limiting pronation motion through dental fixation, thereby enabling shorter treatment times, more accurate dose delivery, and enhanced patient comfort.

Precise, accessible, and patient-conformal in-vivo dosimetry remains a central requirement for assurance of safe radiotherapy delivery, particularly in high-dose-rate Total Skin Electron Therapy (HDR-TSET), where large treatment fields and complex patient geo...

Daily anatomical changes can invalidate the geometric, dosimetric, and biological assumptions of reference treatment plans. Quantitative evidence describing fraction-level deviations across disease sites remains limited, and adaptive workflows are often drive...

Evaluate the precision of CT beam width measurements using a pencil ion-chamber.

Low muscle quantity, defined by computed tomography (CT)-based skeletal muscle index (SMI), is emerging as a predictor of clinical outcomes in patients with HNC. This study aims to evaluate whether CT-defined SMI is associated with all-cause mortality in pati...

Dose prediction models operate in the CT dose domain and require a conventional optimization step to translate the predicted dose into deliverable parameters in beam’s-eye view (BEV). To address the taxing direct aperture optimization (DAO) process, directly...

Diagnostic and Interventional Radiology Physics

Failure Mode and Effects Analysis (FMEA) is the standard for proactive risk management in radiation therapy under AAPM TG-100 guidelines, yet traditional implementation can exceed 100 hours per process and shows significant inter-rater variability. This work...

Professional

Therapeutic electron beams are normally characterized by a percent dose versus depth (PDD) curve. Beam tuning based on PDD features can produce large variations in the resulting energy spectra, potentially leading to premature maintenance requirements. A stud...