Authors: Huixiao Chen, Ethan Hartowicz, Lichung Ku, Tim Perez, Ray Yang
Affiliation: Salem Health, RefleXion Medical, Department of Therapeutic Radiology, Yale University School of Medicine
Abstract Preview: Purpose: To characterize MV-kV isocenter offset on a novel ring gantry radiotherapy system where the Linac, PET, kV-CT, and MV imaging subsystems rotate together at native operating speed of 60RPM.
Authors: Matthew Stephen Andriotty, Taoran Cui, Josh Kilian-Meneghin, Ke Nie, Xiao Wang, Zhenyu Xiong, Ning J. Yue, Yin Zhang
Affiliation: Rutgers Cancer Institute of New Jersey, RWJBarnabas Health
Abstract Preview: Purpose: To investigate the potential impact of the Elekta Unity’s 1.5T magnetic field upon the performance of a conventional linac installed in an adjacent vault.
Methods: The linac vaults for thi...
Authors: Junsheng Cao, Luis A. Maduro Bustos, Khushdeep Singh
Affiliation: Overlook Medical Center, Atlantic Health System at Morristown Medical Center
Abstract Preview: Purpose: To evaluate the agreement between the Sun Nuclear Multi-Met Winston Lutz test (WL) and Varian’s Machine Performance Check (MPC) in assessing isocenter alignment, couch, and collimator rotatio...
Authors: Dirk Grunwald, Hans Herzog, Hidehiro Iida, N. Jon Shah, Usman Khalid, Manfred Lennartz, Philipp Lohmann, Ceren Memis, Tobias Meurer, Claudia Regio Brambilla, Jürgen Scheins, Lutz Tellmann, Christoph W. Lerche, Martin Wiesmann, Karl Ziemons
Affiliation: FH Aachen University of Applied Sciences, Department of Chemistry and Biotechnology, Clinic for Diagnostic and Interventional Neuroradiology, Uniklinik Aachen,, Institute of Neuroscience and Medicine (INM-4), Forschungszentrum Jülich GmbH, Institute of Neuroscience and Medicine (INM-4), Forschungszentrum Jülich GmbH,, Central Institute for Engineering, Electronics and Analytics (ZEA-1), Forschungszentrum, Turku PET Center, Institute of Biomedicine, Faculty of Medicine, University of Turku,
Abstract Preview: Purpose: Quantitative brain studies with positron emission tomography (PET) often require an arterial input function (AIF), which traditionally requires arterial cannulation. However, this is invasive...
Authors: Nellie Brovold, Wenbo Gu, Huan Amanda Liu, Lin Ma
Affiliation: University of Pennsylvania, Mayo Clinic
Abstract Preview: Purpose: To develop a low-cost comprehensive QA phantom and software for single-iso multi-target SRS Linac machines. This phantom can perform 1) Winston-Lutz QA test for on-axis and off-axis targets, ...
Authors: Cambridge L Bui-Nguyen, Alexander S. Nguyen, Liqiang (Lee) Tao
Affiliation: Varian AOS @Epic Care, UC Berkeley
Abstract Preview: Purpose: Dynamic Winston-Lutz (WL) testing provides a comprehensive framework for evaluating the accuracy of isocenter alignment. This study investigates the impact of dynamic beam modulation, such as...
Authors: Angel Gomez, Titania Juang, Grace Gwe-Ya Kim, Boyu Meng
Affiliation: UC San Diego, UCSD, University of California San Diego
Abstract Preview: Purpose: Single-Isocenter Multiple Targets (SIMT) Stereotactic Radiosurgery (SRS) is widely used for its precision and effectiveness. However, standardized quality assurance (QA) protocols for SIMT SR...
Authors: Maria de la Luz De Ornelas, Yunze Yang
Affiliation: University of Miami
Abstract Preview: Purpose:
An extended Winston-Lutz test (EWL), also known as off-axis Winston-Lutz, was performed to assess the linear accelerator’s (linac) deviations at isocenter and five off-iso targets. The imp...
Authors: Peter Balter, Thomas Alexander Cuthbert, Weiliang Du, Song Gao, Nicholas Zacharopoulos
Affiliation: Aktina Medical Corp, The University of Texas MD Anderson Cancer Center
Abstract Preview: Purpose: The purpose of this study is to evaluate the accuracy and reproducibility of a commercial product for verifying the size, location, and coincidence of physical isocenter (P_iso) and radiation...
Authors: Colton Baley, Bhuvaneswari Narayanan, Niko Papanikolaou, Daniel L. Saenz
Affiliation: UT Health San Antonio, Texas Oncology, University of Texas HSC San Antonio
Abstract Preview: Purpose: To evaluate the accuracy of off-axis winston lutz (WLT) for linac based stereotactic radiosurgery (SRS) treatments using in-house phantom.
Methods: Traditional WLT that uses cone and s...
Authors: Weiliang Du
Affiliation: The University of Texas MD Anderson Cancer Center
Abstract Preview: Purpose: Winston-Lutz (WL) tests are often used to localize the radiation isocenter of a linac. The selection of gantry and collimator angles can affect the accuracy of the resulting isocenter. The ef...
Authors: Adebayo Abe, Samuel Olaolu Adeneye, Eben Aje, Bidemi I. Akinlade, Inioluwa Damilola Ariyo, Lilian Ekpo, Muhammad Habeebu, Adedayo O. Joseph, Charles S. Mayo, Noah Ndianaobong, Ikechi S Ozoemelam, Margaret Dideolu Taiwo, Godwin Uwagba
Affiliation: University of Michigan, University of Ibadan, University of Lagos, Missouri University of Science and Technology, NSIA-LUTH Cancer Center, University of Lagos, NSIA-LUTH Cancer Centre, NSIA-LUTH Cancer Center
Abstract Preview: Purpose:
Head and neck cancers (HNC) present significant challenges in radiotherapy due to complex anatomy and the proximity to critical organs at risk (OARs). These challenges are compounded in na...
Authors: Albert Admasu, Kayla Alfonso, Maria de la Luz De Ornelas, Nesrin Dogan, Eric Mellon, Yunze Yang
Affiliation: University of Miami, Department of Radiation Oncology, University of Miami, University of Miami Sylvester Comprehensive Cancer Center
Abstract Preview: Purpose: Rotational uncertainties in single-isocenter multi-target (SIMT) stereotactic radiosurgery (SRS) HyperArc treatments can cause additional target displacement, potentially degrading overall pl...
Authors: Asma Amjad, Slade J. Klawikowski, Natalya V. Morrow, Haidy G. Nasief, Eric S. Paulson, An Tai, Hualiang Zhong
Affiliation: Department of Radiation Oncology, Medical College of Wisconsin
Abstract Preview: Purpose: Accurate and precise linac-based SRS commissioning can be very challenging. Thus, it is important to increase the confidence in the measurement at each step prior to end-to-end testing. The p...
Authors: Cambridge L Bui-Nguyen, Alexander S. Nguyen, Liqiang (Lee) Tao
Affiliation: Varian AOS @Epic Care, UC Berkeley
Abstract Preview: Purpose: To quantity variations in Winston Lutz (WL) test results due to different energies used in SBRT, SRT or SRS.
Methods: A WL phantom with a 6.4 mm diameter center radio-opaque sphere is used...