Search Submissions πŸ”Ž

Results for "solid angle": 11 found

Assessment of the Dosimetric Characteristics of Brass Mesh Bolus in Electron Radiation Therapy

Authors: Hungcheng Hank Chen, Laura A. Doyle, Helena Frisbie-Firsching, Amy S. Harrison, Jackson D Reeves, Lindsay B Romak, Jon Strasser

Affiliation: Christiana Care

Abstract Preview: Purpose: Brass mesh bolus (BMB) is a high-density woven metal mesh which is an excellent alternative to tissue equivalent bolus in photon beams, offering improved surface conformality. Unlike utilizat...

Asymmetrical High Performance Brain Dedicated PET System: Design Optimization and Performance Evaluation

Authors: Yuemeng Feng, Hamid Sabet

Affiliation: Massachusetts General Hospital, Harvard Medical School

Abstract Preview: Purpose: We propose a novel brain-dedicated PET system comprising elliptical cylinder with a neck cut-out, supplemented by front and back panels to improve sensitivity and line-of-response sampling. T...

BEST IN PHYSICS MULTI-DISCIPLINARY: Evaluation of Spot-Level N-12 PET Imaging for Online Range Verification in Multi-Field Intensity Modulated Proton Therapy

Authors: Zahra Ahmadi Ganjeh, Stefan Both, Peter Dendooven, Jeffrey Free, Brian Zapien Campos

Affiliation: Department of Radiation Oncology, University Medical Center Groningen, University of Groningen, Particle Therapy Research Center (PARTREC), Department of Radiation Oncology, University Medical Center Groningen, University of Groningen

Abstract Preview: Purpose: Positron emission tomography (PET) has been investigated for range monitoring in intensity-modulated proton therapy (IMPT), but real-time feedback been limited due to the focus on long-lived ...

Correction Factors for Estimating Skin Dose from Overresponse of Two Commercial Optically Stimulated Luminescence Dosimeters

Authors: Min Cheol Han, Chae-Seon Hong, Changhwan Kim, Dong Wook Kim, Hojae Kim, Hojin Kim, Jin Sung Kim, HO Lee, Kwangwoo Park, Ye-In Park, Junyoung Son

Affiliation: Department of Radiation Oncology, Yonsei Cancer Center, Heavy Ion Therapy Research Institute, Yonsei University College of Medicine, Department of Radiation Oncology, Yongin Severance Hospital, Yonsei University College of Medicine

Abstract Preview: Purpose: Overresponse in surface in-vivo dosimetry using optically stimulated luminescence dosimeter (OSLD) depends on the beam incidence angle. This study aimed to investigate correction factors to d...

Feasibility Study of Single Gantry Angle Proton Minibeam Lattice Radiotherapy

Authors: Anthony Hong Cheol Lim, Rayyan L Mahmood, Alexander Stanforth, Chris C. Wang, Mingyao Zhu

Affiliation: Georgia Institute of Technology, Emory University

Abstract Preview: Purpose: The purpose of this project is to test the feasibility of proton minibeam lattice radiotherapy within an existing clinical setting.
Methods:
The TOPAS code is used to model a scenario i...

Film-Based Method for Accurate Radiation Isocenter Determination in Linear Accelerators Using 3D Starshot

Authors: Robert A. Corns, Mohammad Kanber

Affiliation: East Carolina University, East Carolina University Brody School of Medicine

Abstract Preview: Purpose:
Accurate determination of the radiation isocenter is crucial for precise radiotherapy treatments, directly impacting patient safety and treatment quality. This study presents a computation...

Improving Quantitative Accuracy of Maximum-a-Posteriori Expectation Maximization Reconstruction By Optimizing Gibbs Prior Parameters in SPECT

Authors: Krishnendu Saha

Affiliation: Cleveland Clinic Foundation

Abstract Preview: Purpose: The goal is to improve quantitative accuracy of a Maximum-a-posteriori expectation maximization (MAPEM) reconstruction of SPECT phantom images by optimizing Gibbs prior parameters.
Methods...

Investigating the Dosimetric Benefits of Enhanced Solid Angle Accessibility in a Self-Shielded Radiosurgery System

Authors: Peter Jermain, Ying Niu, Abdul Rashid, Yuan Yuan, Mohammad Zarenia

Affiliation: Medstar Georgetown University Hospital, MedStar Georgetown University Hospital, Department of Radiation Medicine, MedStar Georgetown University Hospital

Abstract Preview: Purpose: ZAP-X is a self-shielded radiosurgery system that utilizes a linac-based isocentric technique and a compact gyroscopic gantry design. While it provides a large solid angle for beam orientatio...

Mobetron Quality Assurance Tools

Authors: Robert A. Dahl

Affiliation: Mayo Foundation

Abstract Preview: Purpose: To develop tools to simplify/accelerate the quality assurance testing of the Mobetron mobile linear accelerator and increase safety when moving it to different OR’s.

Methods: The Mobet...

Non-Planar Narrow-Beam CT: Near Scatter-Free, High-Resolution Breast Imaging at Screening Mammography Doses.

Authors: Peymon Ghazi

Affiliation: MALCOVA Inc.

Abstract Preview: Purpose: To develop a near scatter‐free breast CT imaging system that expands coverage of the posterior breast anatomy and enhances contrast resolution for solid masses and microcalcifications, while ...

Optically Guided Speculum for Needle or Other Probe-Based Interventions in Small Animals

Authors: Michael B. Altman, Marlene Campos Guerrero, Stephanie Markovina, Aaron Silvus

Affiliation: Washington University School of Medicine

Abstract Preview: Purpose: Currently, fluid injections or needle biopsies in small animals are conducted with limited optical guidance introducing an inherent risk of infecting or injuring the animal and limits precisi...