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Results for "technology current": 23 found

A Study of Large Model Alignment Techniques for MRI Images of Small Sample Meningioma

Authors: Xiangli Cui, Man Hu, Wanli Huo, Da Yao, Jianguang Zhang, Yingying Zhang, Shanyang Zhao

Affiliation: Institute of Health and Medical Technology, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei, the Zhejiang-New Zealand Joint Vision-Based Intelligent Metrology Laboratory, College of Information Engineering, China Jiliang University, Departments of Radiation Oncology, Zibo Wanjie Cancer Hospital, Department of Oncology, Xiangya Hospital, Central South University, Department of Radiation Oncology, Shandong Cancer Hospital and Institute, Shandong First Medical University, Shandong Academy of Medical Sciences

Abstract Preview: Purpose:
To study the fine-tuning strategy of pre-trained AI image generation model to adapt to the generation of small sample meningioma MRI images, explore its impact on observer performance, and...

Addressing Radionuclide Decay Complexities in Targeted Alpha Therapy: A Computational Approach.

Authors: Denis Bergeron, Ryan P Fitzgerald, Ravneet Kaur, Rao Khan

Affiliation: John Hopkins University, NIST Radiation Physics Division, Howard University, National Institute of Standards and Technology

Abstract Preview: Purpose: There is growing interest in short-lived alpha-emitting radionuclides for cancer therapy due to their ability to selectively target and destroy cancer cells while sparing healthy tissue. Howe...

Applicability of Online Dose Measurement in Trilogy Linear Accelerators: Using Target Current Pulse Counting Method

Authors: Daming LI, Jinsen Xie, Zhe Zhang

Affiliation: Peking University Shenzhen Hospital Radiotherapy Department, School of Nuclear Science and Technology, University of South China

Abstract Preview: Purpose:
This study aims to investigate the feasibility of online dose measurement of the Trilogy linear accelerator output based on target current pulse signals.
Methods:
A data acquisition ...

Assessing the Potential of Virtual Grid Portable Radiographic Systems for Radiation Dose Reduction: A Comparative Evaluation of Deviation Index in Abdominal Imaging

Authors: Gary Y. Ge, Azmul Siddique, Jie Zhang

Affiliation: Department of Radiology, University of Kentucky, University of Kentucky

Abstract Preview: Purpose: Virtual grid technology addresses scattered radiation without a physical grid, offering the potential to reduce patient radiation dose while maintaining image quality. However, this potential...

Assessment of the Quantum-CMOS Image Sensor for Use in Cherenkov Imaging during Radiation Therapy

Authors: Petr Bruza, Jeremy Eric Hallett, Brian W Pogue

Affiliation: Thayer School of Engineering, Dartmouth College, University of Wisconsin - Madison, University of Wisconsin-Madison

Abstract Preview: Purpose: Cherenkov imaging is a powerful tool for localizing entrance and exit dose during radiotherapy treatment. The current implementation uses an intensified-CMOS (iCMOS) camera allowing for high-...

Characterization of Commercially-Available Dosimeters and Prototype Diamond Detectors for Absolute Flash Dosimetry of Small-Field Pulsed Proton Beams

Authors: Ronald C Chen, Hao Gao, Nicolas Gerard, Harold Li, Yuting Lin, Jarrick Nys, Jufri Setianegara, Mark Szczepanski, Aoxiang Wang

Affiliation: 4Physikalisch-Technische Werkstätten (PTW), Department of Biomedical Engineering, Huazhong University of Science and Technology, Ion Beam Applications (IBA), Department of Radiation Oncology, University of Kansas Medical Center

Abstract Preview: Purpose: Modern synchrocyclotrons can produce magnetically-scanned protons at ultra-high dose-rates (FLASH). However, their pulsed nature leads to high doses-per-pulse (DPP) which can cause non-neglig...

Data-Driven Forward Projector for Optimization of the Proton Stopping Power Calibration in Treatment Planning Based on Sparse Proton Radiographies

Authors: Hector Andrade-Loarca, Ines Butz, Chiara Gianoli, Prof. Gitta Kutyniok, Jianfei Li, Katia Parodi, Prof. Vincenzo Patera, Angelo Schiavi, Prof. Ozan Öktem

Affiliation: Sapienza University of Rome, Department of Mathematics, Royal Institute of Technology, School of Computation, Information and Technology, Technische Universitaet Muenchen, Department of Medical Physics, Ludwig-Maximilians-Universität München (LMU Munich), Department of Mathematics, Ludwig-Maximilians-Universität (LMU) München, Department of Medical Physics, Ludwig-Maximilians-Universität (LMU) München

Abstract Preview: Purpose: To explore and demonstrate the feasibility of accurate and fast prediction of the water equivalent thickness (WET) distribution of tissue traversed by a proton imaging pencil beam, aiming at ...

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...

Empowering Radiation Oncology in Sudan with Virtual and Augmented Reality Solutions

Authors: Abdelfatah Abdalla Nemer Abdelsalam, Elmubarak M. Ahmed, Sarah A. Ashmeg, M. Saiful Huq, Alsadeg Awad Alamin Mohamed, Ali Sid Ahmed Mohammed, Christopher Tyerech

Affiliation: UPMC Hillman Cancer Center and University of Pittsburgh School of Medicine, Department of Radiation Oncology, UPMC Hillman Cancer Center, University of Medical Science and Technology, King Abdulaziz Medical City, Department of Radiation Oncology, University of Pennsylvania, Tumor Therapy and Cancer Research Center, Al Neelain University

Abstract Preview: Purpose: Severe conflict in Sudan has led to the closure of several cancer services within the country. With new centers in development by an IAEA and Rays of Hope initiative, many barriers exist in m...

Evaluating Discrete Proton Arcs Converted to Pencil Beam Scanning Plans for Glioma and Chordoma in Raystation with a Mevion s250i Hyperscan Proton Therapy System

Authors: Mark A. Newpower, Jill Taylor

Affiliation: University of Oklahoma Health Sciences Center

Abstract Preview: Purpose: RayStation 2024A allows planners to optimize intensity modulated proton therapy (IMPT) plans using discrete arcs which can then be converted to traditional pencil beam scanning (PBS) beams fo...

Feasibility Study of Using HDR1000+ Well-Type Ionization Chambers for Solution Based 90y Measurements

Authors: Denis Bergeron, Larry A. DeWerd, Sean Jollota, Peyton Alexandra Lalain, Likhitha Polepalli

Affiliation: Department of Medical Physics, School of Medicine and Public Health, University of Wisconsin - Madison, National Institute of Standards and Technology

Abstract Preview: Purpose: 90Y is a challenging radionuclide to measure because it is a pure beta-emitter and is typically quantified using a radionuclide calibrator. These devices, such as the Capintec model used in t...

Feasibility of Producing GRID Therapy Dosimetry Using a Compact Linac Treatment Head with Pencil Beam Scanning

Authors: Yiran Liu, Zhengzheng Liu, Fang-Fang Yin

Affiliation: Duke Kunshan Univeristy, Huazhong University of Science and Technology, Medical Physics Graduate Program, Duke Kunshan University

Abstract Preview: Purpose: To investigate the feasibility of producing high dose rate GRID therapy using a compact linear accelerator (LINAC) treatment head with scanning beam and stationary grid collimator.
Methods...

Feasibility of Real-Time Monitoring in Tumor Treating Fields Therapy Using Electrical Impedance Tomography: Analysis of Current Injection and Measurement Patterns

Authors: Sung Hwan Ahn, Yongha Gi, Jinju Heo, Jinyoung Hong, Yunhui Jo, Yousun KO, Hyeongjin Lim, Sang Yoon PARK, Myonggeun Yoon

Affiliation: Institute of Global Health Technology (IGHT), Korea University, Republic of Korea, Korea University, Samsung Medical Center

Abstract Preview: Purpose:
This study aims to evaluate the feasibility of real-time monitoring of conductivity changes induced by thermal variations during tumor treating fields (TTFields) therapy using Electrical I...

Joint Optimization of Patient-Specific Range Modulators and Beam Intensities for Conformal Flash Proton Therapy

Authors: Hao Gao, Jiayue Han, Wangyao Li, Yuting Lin, Jufri Setianegara, Aoxiang Wang, Yanan Zhu

Affiliation: Department of Biomedical Engineering, Huazhong University of Science and Technology, Department of Radiation Oncology, University of Kansas Medical Center

Abstract Preview: Purpose: Proton therapy leverages Bragg-peak-based dose delivery to achieve ultra-high-dose-rate FLASH with patient-specific range modulators (PSRM). Current proton FLASH (pFLASH) planning typically i...

Medical Physics in the Oncoverse

Authors: Chandrasekhar Kota

Affiliation: Christiana Care Hospital

Abstract Preview: Purpose: To reflect on the present and future role of Medical Physics in the Oncoverse.
Methods: Oncoverse is the rapidly evolving and expanding ecosystem of all things related to cancer. The Medic...

Memory-Efficient Deep Learning for Volumetric Cone-Beam CT Image Reconstruction

Authors: Ziqi Gao, Lei Xing, Siqi Ye, S. Kevin Zhou

Affiliation: Department of Radiation Oncology, Stanford University, University of Science and Technology of China (USTC)

Abstract Preview: Purpose: To address the challenge of high memory usage in volumetric cone-beam CT (CBCT) imaging, we propose a method that combines joint reconstruction and super-resolution for sparsely sampled CBCT ...

Modernization of the NIST Air-Kerma Strength Standard for LDR Brachytherapy Seeds

Authors: Michael G. Mitch, Csilla I. Szabo-Foster

Affiliation: National Institute of Standards and Technology

Abstract Preview: Purpose: The U.S. air-kerma strength standard for low-dose-rate (LDR) low-energy photon-emitting brachytherapy sources provides measurement traceability for calibrations at the AAPM Accredited Dosimet...

Non-Invasive Photoacoustic Thermometry for Real-Time Monitoring of Tissue Temperature Using Frequency Analysis

Authors: Hisham Assi, Lexi Dowdy, Muhannad N. Fadhel, Michael C. Kolios, Carl Kumaradas, Rasha S Makkia, Tanay N Mannikar

Affiliation: Toronto Metropolitan University, Augusta University, Institute for Biomedical Engineering, Science and Technology (iBEST), Li Ka Shing Knowledge Institute, St. Michael’s Hospital, Northwestern University, Medical College of Georgia, Augusta University

Abstract Preview: Introduction: Hyperthermia is an emerging strategy for cancer treatment due to its few side effects and low cost. Hyperthermia is used in conjunction with other treatments, such as radiation therapy, ...

Online Active Learning Strategies for Global Medical Physics Education: A Scoping Review

Authors: Mary Gronberg, Kelly Kisling, Ana Maria Marques da Silva

Affiliation: University of California, San Diego, The University of Texas Southwestern Medical Center, Pontifical Catholic University of Rio Grande do Sul

Abstract Preview: Purpose: To evaluate the current status of online teaching in medical physics and identify effective active learning strategies for global medical physics education.
Methods: A scoping review was c...

Patient Specific Protocol Optimization in Cardiac CT: A Practical Approach to Its Validation

Authors: Zhihua Qi

Affiliation: Henry Ford Health

Abstract Preview: Purpose: State of the art cardiac CT has built-in automated, patient specific optimization, taking into account a number of factors including patient size, heart rate and others. It is crucial to deve...

Performance Evaluation of an Upright, Short-Scan, Cone-Beam, Dedicated Breast CT System.

Authors: Stephen Araujo, Jing-Tzyh Alan Chiang, Cynthia E. Davis, Eri Haneda, Andrew Karellas, Thomas C Larsen, William Ross, Hsin Wu Tseng, Srinivasan Vedantham, Pengwei Wu

Affiliation: Department of Biomedical Engineering, The University of Arizona, GE Aerospace Research, Department of Medical Imaging, The University of Arizona, GE HealthCare Technology & Innovation Center

Abstract Preview: Purpose: The purpose of this work is to describe the design and development of a newly developed upright-geometry dedicated breast CT system and to quantitatively and qualitatively evaluate its imagin...

Physics and Technology of Current DXA Systems

Authors: Jeff E.R Frimeth

Affiliation: JF Medical Physics Inc.

Abstract Preview: N/A...

Technique Factors Optimization and Radiation Dosimetry of an Upright, Short-Scan, Cone-Beam, Dedicated Breast CT System

Authors: Stephen Araujo, Jing-Tzyh Alan Chiang, Cynthia E. Davis, Eri Haneda, Andrew Karellas, Thomas C Larsen, William Ross, Hsin Wu Tseng, Srinivasan Vedantham, Pengwei Wu

Affiliation: Department of Biomedical Engineering, The University of Arizona, GE Aerospace Research, Department of Medical Imaging, The University of Arizona, GE HealthCare Technology & Innovation Center

Abstract Preview: Purpose: To determine the system parameters and technique factors for image acquisition needed so that the mean glandular dose (MGD) of approximately 4.5 mGy is not exceeded for a recently developed, ...