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Results for "surrounding tissues": 25 found

4D Monte Carlo Dose Evaluation for Mobile Targets in a Magnetic Field

Authors: Odunola Grace Babawale, B. Gino Fallone, Alireza Gazor, Andrei D. Ghila, Patricia A. K. Oliver, Michael W. Reynolds, Keith D. Wachowicz, Tania Rosalia Wood, Shima Y. Tari, Eugene Yip, Jihyun Yun

Affiliation: Nova Scotia Health, Dept. of Medical Physics and Dalhousie University, Dept. of Physics and Atmospheric Science, Dept. of Radiation Oncology, Dept. of Medical Physics, Cross Cancer Institute and Dept. of Oncology, University of Alberta; MagnetTx Oncology Solutions, www.magnetTX.com, Department of Medical Physics, Arthur J. E. Child Comprehensive Cancer Centre, Dept. of Medical Physics, Cross Cancer Institute and Dept. of Oncology, University of Alberta, Department of Medical Physics, BC Cancer, Medical Physics Division, Department of Oncology, University of Alberta and Department of Medical Physics, Cross Cancer Institute

Abstract Preview: Purpose: To evaluate the dose to a moving target and its surroundings in a magnetic field using 4D-Monte-Carlo (MC) simulation.
Methods: The study utilizes a previously validated MC model of our li...

A Dosimetric Investigation into the Potential of Aperture-Based Techniques to Improve the Clinical Outcomes of Single-Energy Proton Bragg Peak Flash Therapy for Ocular Cancers

Authors: Arpit M. Chhabra, J Isabelle Choi, Minglei Kang, Haibo Lin, Hang Qi, Charles B. Simone, Shouyi Wei, Irini Yacoub, Francis Yu, Xingyi Zhao, Ajay Zheng

Affiliation: New York Proton Center, Department of Radiation Oncology and Molecular Radiation Sciences, Johns Hopkins University School of Medicine, Department of Human Oncology, University of Wisconsin-Madison

Abstract Preview: Purpose:
Pencil beam scanning (PBS) proton therapy effectively treats ocular cancer by minimizing exit doses to normal tissues. However, challenges remain in sparing nearby organs-at-risk(OARs). Ul...

A Novel Margin-Based Focal Distance Loss for Lesion Segmentation in Medical Imaging

Authors: Weiguo Lu, Hua-Chieh Shao, Guoping Xu, You Zhang

Affiliation: Medical Artificial Intelligence and Automation (MAIA) Lab, Department of Radiation Oncology, UT Southwestern Medical Center, Medical Artificial Intelligence and Automation (MAIA) Laboratory, Department of Radiation Oncology, UT Southwestern Medical Center

Abstract Preview: Purpose:
Neural network-based lesion segmentation remains a significant challenge due to the low contrast between lesions and surrounding tissues (high ambiguity) and the variability of lesion shap...

An Integrated Optimization Method for Joint Lattice Positioning and Dose Planning in Lattice Therapy

Authors: Hao Gao, Xue Hong, Harold Li, Yuting Lin, Jufri Setianegara, Xin Tong, Chao Wang, Weijie Zhang, Ya-Nan Zhu

Affiliation: Department of Radiation Oncology, University of Kansas Medical Center

Abstract Preview: Purpose: Lattice radiotherapy (LATTICE) is a form of spatially fractionated radiation therapy (SFRT) designed to deliver high radiation doses to specific tumor regions (vertices) while sparing surroun...

Assessment of Viscoelastic Changes in Ex Vivo Liver Tissue Using Pulsed Magnetomotive Ultrasound during Magnetic Hyperthermia

Authors: David Alejandro Collazos Burbano, Antonio Adilton Oliveira Carneiro, Paul L. Carson, Jose Eduardo Freire, Theo Zeferino Pavan, Joao Henrique Uliana, Nicholas Zufelato

Affiliation: University of São Paulo, University of Michigan, University of Sao Paulo

Abstract Preview: Purpose: Develop a theranostic platform that integrates magnetic hyperthermia (MH), ultrasound, and magnetic nanoparticles (MNPs) to improve diagnosis, treatment, and monitoring of hyperthermia proced...

Automated Tool for Radiotherapy Initial Patient Setup: A Robust Approach Based on Vertebral Identification

Authors: Hailun Pan, Yingli Yang, Jie Zhang, Yibin Zhang

Affiliation: Department of Radiation Oncology,Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Department of Radiology, Ruijin Hospital, Department of Radiation Oncology, Ruijin Hospital, , Shanghai Jiaotong University School Of Medicine, Shanghai United imaging Healthcare Advanced Technology Research Institute

Abstract Preview: Purpose: Accurate patient positioning is critical in radiotherapy (RT) to ensure effective treatment delivery and minimize harming surrounding healthy tissues. Vertebral misalignment during RT setup h...

Biokinetic Modeling and Dosimetry of Radiopharmaceutical Extravasation in Lu-177-PSMA Therapy for Metastatic Castration-Resistant Prostate Cancer

Authors: Shaheen Dewji, Emmanuel Mate-Kole, Sergio F Ruiz, Chris C. Wang

Affiliation: Georgia Institute of Technology, Nuclear and Radiological Engineering and Medical Physics Programs, Georgia Institute of Technology

Abstract Preview: Purpose: Extravasations are clinical events when a substance is administered intravenously and the fluid starts to leak into surrounding tissue instead of the target vessel. In the case of radiopharma...

Dosimetric Analysis of Plans Using X-Ray and X-γ-Ray Combination Strategy for Advanced Cervical Cancer Patients with Pelvic Lymph Node Metastasis

Authors: Yi Li

Affiliation: Department of Radiation Oncology, the First Affiliated Hospital of Xi'an Jiaotong University

Abstract Preview: Purpose: Advances in radiotherapy technology are crucial for improving cervical cancer (CC) treatment. This study explores a novel X-ray and γ-ray dual-modality radiation (TaiChiB) system, comparing i...

Dosimetric Assessment of Spatially Fractionated Radiation Therapy on Prostate Cancer Cases: Our Experience in Nsia-Luth Cancer Center, Lagos

Authors: Adebayo Abe, Samuel Olaolu Adeneye, Bidemi I. Akinlade, Inioluwa Damilola Ariyo, Sylvester Entonu, Muhammad Habeebu, Adedayo O. Joseph, Oluwaseyi Oderinde, Oluwadara Ojediran, Margaret Dideolu Taiwo

Affiliation: University of Ibadan, University of Lagos, Missouri University of Science and Technology, Purdue University, NSIA-LUTH Cancer Center, University of Lagos, NSIA-LUTH Cancer Centre

Abstract Preview: Purpose:
Spatially Fractionated Radiation Therapy (SFRT) is an advanced radiotherapy technique designed to deliver highly heterogeneous radiation doses, aiming to optimize tumor control while minim...

Dynamic X-Ray Acoustic Computed Tomography (XACT)

Authors: Leshan Sun, Liangzhong Xiang, Yifei Xu, Yuchen Yan

Affiliation: University of California, Irvine

Abstract Preview: Purpose: X-ray Acoustic Computed Tomography (XACT) is a transformative innovation in medical imaging, overcoming the limitations of conventional X-ray techniques. It introduces new possibilities in cl...

Enhancing the Capability of Intrafractional Target Tracking for Prostate SBRT Via Tissue Decomposition Imaging

Authors: Sarah Burleson, Antonio L. Damato, Yabo Fu, Laura Happersett, Tianfang Li, Xiang Li, Himanshu Nagar, Pengpeng Zhang

Affiliation: Department of Medical Physics, Memorial Sloan Kettering Cancer Center, Memorial Sloan Kettering Cancer Center

Abstract Preview: Purpose: An iodinated hydrogel perirectal spacer, injected between the prostate and rectum, reduces rectal high-dose exposure during prostate SBRT. We assessed the feasibility of tracking the spacer a...

Evaluating the Theranostic Potential of a Novel Shark Derived Anti-MET Vnar Antibody in NSCLC

Authors: Andrew M Baschnagel, Jonathan W. Engle, Jessica E. Griffin, Gihan Gunaratne, Reinier Hernandez, Randall J Kimple, Aaron M. LeBeau, Natalie Y. Luo, Rachel Minne, Caroline M. Mork, Kwangok P Nickel, Jayden West, Madalynn R. Wopat

Affiliation: University of Wisconsin, University of Wisconsin, Department of Pathology and Laboratory Medicine, Department of Medical Physics, School of Medicine and Public Health, University of Wisconsin–Madison, University of Wisconsin - Department of Human Oncology, UW Madison, University of Wisconsin, Department of Medical Physics

Abstract Preview: Purpose: The Mesenchymal-Epithelial Transition gene (MET), a targetable cell surface receptor responsible for stimulating cell growth and proliferation, is altered in approximately 10% of non-small ce...

Four-Dimensional on-Beam Computed Tomography Reconstruction from Projection Image Differences Representing Motion Change

Authors: Kwang-Ho Cheong, Seungryong Cho, Joonil Hwang, Jae Won Jung, Hoyeon Lee, Raymond Hyunwoo Moon, Inhwan Yeo, Jihyung Yoon

Affiliation: East Carolina University, INOVA Schar Cancer Institute, University of Hong Kong, Hanllym University, KAIST, University of Rochester

Abstract Preview: Purpose: Monitoring a target and neighboring organs during beam delivery is crucial for successful radiotherapy (RT). Conventional transit imaging methods lack volumetric reconstruction capabilities, ...

Functional MRI Guided Partial Tumor Irradiation to Improve Tumor Control and Spare Tumor Microenvironment

Authors: Bingqi Guo, Ping Xia

Affiliation: Cleveland Clinic

Abstract Preview: Purpose:
Spatially fractionated radiation therapy (SFRT) delivers a “GRID” or “lattice” of high and low doses to tumors to increase tumor control, minimize normal tissue damage, and preserve the im...

G4BraggReflection: Pioneering Wave-Particle Simulations for Convergent Radiotherapy and Beyond

Authors: Dirk A Bartkoski, Michael Kleckner, Dongyeon Lee, Reza Reiazi, Mohammad Reza Salehpour

Affiliation: The University of Texas MD Anderson Cancer Center, Convergent-RnR

Abstract Preview: Purpose:
To develop and validate G4BraggReflection, a novel physics process within Geant4, designed to incorporate diffraction properties resulting in Bragg reflection into Monte Carlo simulations....

Imaging Preclinical Proton Flash Radiation Using a Small Animal PET System

Authors: Xun Jia, Heng Li, Wen Li, Devin Miles, Daniel Sforza, Lingshu Yin, Yuncheng Zhong

Affiliation: Department of Radiation Oncology and Molecular Radiation Sciences, Johns Hopkins University, Department of Radiation Oncology and Molecular Radiation Sciences, Johns Hopkins University School of Medicine, Johns Hopkins University

Abstract Preview: Purpose: FLASH therapy holds great potential to revolutionize radiotherapy by minimizing toxicities of normal tissues. The extraordinarily high dose rate of FLASH proton beam makes precise delivery to...

Investigating Gammatile Migration: Implications for Dosimetry and Clinical Outcomes

Authors: Wesley A. Belcher, Robert A. Corns, Jae Won Jung, Matthew S Peach, Swarup Sharma

Affiliation: The University of North Carolina at Chapel Hill, East Carolina University Brody School of Medicine

Abstract Preview: Purpose: GammaTiles are a novel intracranial brachytherapy approach designed to directly deliver radiation therapy to residual or recurrent brain tumors following resection. Despite their promising th...

Measurement of Microscopic Velocity Gradients Using Magnetic Nanoparticles in Blood Flow

Authors: Scott Gordon-Wylie, Scott Gordon-Wylie, Dhrubo Jyoti, John B. Weaver, Terrence Welch

Affiliation: Flow Aluminum, Dartmouth College, Dartmouth-Health

Abstract Preview: Purpose: Identifying vulnerable plaques is critical to preventing stroke and myocardial infarction. There are two components contributing to the risk of rupture: the mechanical integrity of the plaque...

Minimizing Abscopal Effects in Normal Tissues with Flash-RT: Mechanisms of Action and Potential Clinical Applications

Authors: Liang Cui, Xingyu Lu, Hang Shang, LingHong Zhou

Affiliation: Southern Medical University

Abstract Preview: Purpose: This study examines how varying dose rates of radiotherapy impact normal tissues outside the target area and analyzes the protective effects and regulatory mechanisms of ultra-high dose rate ...

Modeling Alpha-Particle Dose from Diffusing Alpha-Emitters Radiation Therapy in Tissue with Inhomogeneous Diffusion

Authors: Lior Arazi, Gil'ad N. Cohen, Antonio L. Damato, Irene P. Zhang

Affiliation: Unit of Nuclear Engineering, Faculty of Engineering Sciences, Ben-Gurion University of the Negev, NYU Grossman School of Medicine, Memorial Sloan Kettering Cancer Center

Abstract Preview: Purpose: Diffusing alpha-emitters Radiation Therapy (“Alpha DaRT”) is a promising new radiation therapy modality for treating bulky tumors. The dose delivered by Alpha-DaRT sources is dependent on the...

Multi-Region Multiomic Features Improve Random Forest Toxicity Modeling of Radiation Pneumonitis

Authors: Laurence Edward Court, Alexandra Olivia Leone, Zhongxing Liao, Saurabh Shashikumar Nair, Joshua S. Niedzielski, Ramon Maurilio Salazar, Ting Xu

Affiliation: The University of Texas MD Anderson Cancer Center, Department of Radiation Physics, The University of Texas MD Anderson Cancer Center

Abstract Preview: Purpose: Radiation Pneumonitis (RP) predictive models often rely on clinical and DVH parameters, but multiomic features from CT imaging and 3D dose distributions from various regions could provide add...

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...

Patient-Specific Bio-Morphological Features in Cherenkov Imaging for Positioning Verification: A Retrospective Analysis in Accelerated Partial Breast Irradiation (aPBI) VMAT Radiotherapy

Authors: Yao Chen, Lesley A Jarvis, Allison Matous, Rongxiao Zhang

Affiliation: Dartmouth College, University of Missouri, Dartmouth Cancer Center, Dartmouth Health

Abstract Preview: Purpose: Precise patient positioning is critical in accelerated partial breast irradiation (aPBI) to ensure accurate dose delivery to the tumor bed while minimizing exposure to surrounding healthy tis...

Realistic Modeling of Vasculature Flow and Oxygen Distribution in Normal Tissue and Glioblastoma

Authors: Yi Fan, Andrew Friberg, Costas Koumenis, Kevin Teo, Ioannis I Verginadis, Ledi Wang, Jennifer Wei Zou

Affiliation: Department of Radiation Oncology, University of Pennsylvania, University of Pennsylvania

Abstract Preview: Purpose: Glioblastomas (GBM) are aggressive and lethal malignancies characterized by their highly refractory nature, contributing to a five-year survival rate of approximately 7%. Physically, GBM exhi...

Sources of Magnetic Susceptibility Artifacts in MR Imaging of the Jaw and Facial Nerves

Authors: Avneesh Chhabra, Zhiyue J. Wang, Qing Yuan

Affiliation: University of Texas Southwestern Medical Center

Abstract Preview: Purpose: Magnetic susceptibility artifacts from dental arches and hardware often compromise MRI neurography of jaw and facial nerves. This study aims to characterize these artifacts and provide insigh...