A5100401973- Advanced Radiotherapy Techniques
- Radiation Therapy and Dosimetry
- Laser-Plasma Interactions and Diagnostics
- Radiation Detection and Scintillator Technologies
- Dark Matter and Cosmic Phenomena
- Particle Detector Development and Performance
- Medical Imaging Techniques and Applications
- Advanced X-ray Imaging Techniques
- Astrophysics and Cosmic Phenomena
- Laser-induced spectroscopy and plasma
- X-ray Spectroscopy and Fluorescence Analysis
- Particle Accelerators and Free-Electron Lasers
- Neutrino Physics Research
- Particle physics theoretical and experimental studies
- Laser-Matter Interactions and Applications
- Nuclear Physics and Applications
- High-Energy Particle Collisions Research
- Radiomics and Machine Learning in Medical Imaging
- Atomic and Molecular Physics
- Diamond and Carbon-based Materials Research
- Quantum Chromodynamics and Particle Interactions
- Advanced Fiber Laser Technologies
- Nuclear physics research studies
- Solid State Laser Technologies
- High-pressure geophysics and materials
Guizhou Minzu University
2024
University of Michigan
2004-2023
University of Chicago
2019-2023
Northern Kentucky University
2019-2023
Highland Community College - Illinois
2023
Pennsylvania State University
2019-2023
Indiana University Bloomington
2019-2023
Queen's University
2023
Chiba University
2019-2023
McGill University
2019-2023
Purpose: Quantitatively determine an optimum image analysis procedure to mitigate inhomogeneities within the EBT2 film and from scanning for accurate absolute dose measurement deposited by external radiation therapy beam. Multichannel dosimetry procedures were conceived, described, quantitatively tested against single dual channel dosimetry. Methods: A solid water TM block was placed on CT imaging treatment tables in a configuration that avoids bulky compressive devices. markers helped...
Skin dose assessment for chest wall radiotherapy is important to ensure sufficient the surface target volume without excessive skin reaction.This study quantified changes doses as a function of bolus material conventional and intensity modulated radiation therapy (IMRT) tangential fields.Three types materials (2 mm solid, 2 fine mesh 3.2 large Aquaplast) were compared with Superflab.Surface measurements performed using an Attix parallel plate chamber in flat solid water phantom at 0 • , 45...
Using a recently developed first‐principles supercell method that includes the electron and core‐hole interaction, XANES/ELNES spectra of Si‐ L 2,3 , K N‐ edges in α‐Si 3 N 4 β‐Si spinel c ‐Si Si 2 O were calculated compared. The difference total energies between initial ground state final provides transition energy. are found to be good agreement with experimental measurements on . differences for same element different crystals explained terms local bonding. use orbital‐decomposed density...
Purpose: The longitudinal dose ripple on the off‐axis caused by helical radiation delivery, such as TomoTherapy system, has been observed, and its relation with respect to pitch studied empirically found optimal pitches, 0.86/ n , Kissick et al. [Med. Phys. 32 1414–1423 (2005)]. This artifact referred thread effect is periodic in nature various factors. In this work, factors that cause were unveiled, including jaw profile divergence, inverse square law, attenuation, cone effect, their impact...
Abstract Background Delineation of clinical target volume (CTV) for radiotherapy is a time‐consuming and labor‐intensive work. This study aims to propose novel convolutional neural network (CNN)‐based model fast auto‐segmentation CTV. To evaluate its performance utility, blind randomized validation method was used. Methods Our proposed based on the generally accepted U‐Net architecture using computed tomography slices with CTV contours delineated by experienced radiation clinicians from 135...
Clinical target volumes (CTVs) and organs at risk (OARs) could be autocontoured to save workload. This study aimed assess a convolutional neural network for automatic accurate CTV OARs in prostate cancer, while comparing possible treatment plans based on autocontouring clinical plans.Computer tomography (CT) scans of 217 patients with locally advanced cancer treated our hospital were retrospectively collected analyzed from January 2013 2019. A deep learning-based method, CUNet, was used...
Several dynamic techniques are introduced to speed up TomoTherapy delivery and improve longitudinal conformity. These include jaws, couch, their combinations.In general, jaws allow move during a treatment. On the one hand, open wide increase efficiency thus reduce beam-on time. other can close follow target border when sharp penumbra is required near superior inferior borders of tumor sites, which results in improved dose The main purpose couch technique as fast possible at variable...
The purpose was to determine dose‐delivery errors resulting from systematic rotational setup for fractionated stereotactic radiotherapy using direct simulation in a treatment planning system. Ten patients with brain tumors who received intensity‐modulated had dose distributions re‐evaluated assess the impact of errors. dosimetric effect simulated by rotating images and contours 3 matrix. Combined residual translation 1 mm along each axis were simulated. Dosimetric effects rotated evaluated...
HELIX (High Energy Light Isotope eXperiment) is a balloon-borne experiment designed to measure the chemical and isotopic abundances of light cosmic-ray nuclei. Detailed measurements by HELIX, especially $^{10}$Be from $\sim$0.2 GeV/n beyond $\sim$3 GeV/n, will provide an essential set data for study propagation processes cosmic rays. consists 1 Tesla superconducting magnet with high-resolution gas tracking system, time-of-flight detector, ring-imaging Cherenkov detector. The instrument's...
Purpose: Dose accuracy in the buildup region for radiotherapy treatment planning suffers from challenges both measurement and calculation. This study investigates dosimetry at normal oblique incidences open IMRT fields assesses quality of calculations. Methods: was divided into three parts. First, percent depth doses profiles (for , field sizes 0°, 45°, 70° incidences) were measured Solid Water using an Attix parallel plate chamber Kodak XV film, respectively. Second, parameters empirical...
The $^{211,212}\mathrm{At}$ yields resulting from the interaction of radioactive projectile $^{8}\mathrm{Li}$ with a $^{208}\mathrm{Pb}$ target have been measured at energies between $3$ and $8.5$ MeV above Coulomb barrier. They are signatures for fusion whole charge but not necessarily mass projectile, so they included in corresponding operational definition complete fusion. Within this definition, suppression factor $0.70\ifmmode\pm\else\textpm\fi{}0.02$ (stat.)...
Laser wakefield accelerators (LWFA) hold great potential to produce high-quality high-energy electron beams (e beams) and simultaneously bright x-ray sources via betatron radiation, which are very promising for pump-probe study in ultrafast science. However, order obtain a e beam, injection acceleration should be carefully manipulated, where large oscillation amplitude has avoided thus the emitted yield is limited. Here, we report new scheme experimentally enhance radiation significantly...
Objective: Delineation of clinical target volume (CTV) and organs at risk (OARs) is important for radiotherapy but time-consuming. We trained evaluated a U-ResNet model to provide fast consistent auto-segmentation. Methods: collected 160 patients' CT scans with breast cancer who underwent breast-conserving surgery (BCS) were treated radiotherapy. CTV OARs delineated manually used training. The dice similarity coefficient (DSC) 95th percentile Hausdorff distance (95HD) assess the performance...
Purpose: Treatment delivery verification (DV) is important in the field of intensity modulated radiation therapy (IMRT). While IMRT and image guided (IGRT), allow us to create more conformal plans enables use tighter margins, an erroneously executed plan can have detrimental effects on treatment outcome. The purpose this study develop a DV technique verify TomoTherapy's multileaf collimator (MLC) using onboard mega-voltage CT detectors. Methods: proposed method uses temporal changes MVCT...
Purpose: Despite superior target dose uniformity, helical tomotherapy® (HT) may involve a trade-off between longitudinal conformity and beam-on time (BOT), due to the limitation of only three available jaw sizes with conventional HT (1.0, 2.5, 5.0 cm). The recently introduced dynamic running-start-stop (RSS) delivery allows smaller opening at inferior ends when sharp penumbra is needed. This study compared dosimetric performance RSS fixed delivery. Methods: Twenty patient cases were selected...
A unified picture of femtosecond laser induced precipitation in a cloud chamber is proposed. Among the three principal consequences filamentation from point view thermodynamics, namely, generation chemicals, shock waves and thermal air flow motion (due to convection), last one turns out be cause. Much filament chemicals would stick onto existing background CCN's (Cloud Condensation Nuclei) through collision making latter more active. Strong mixing having large temperature gradient result...
The Jiangmen Underground Neutrino Observatory (JUNO), the first multi-kton liquid scintillator detector, which is under construction in China, will have a unique potential to perform real-time measurement of solar neutrinos well below few MeV threshold typical for Water Cherenkov detectors. JUNO's large target mass and excellent energy resolution are prerequisites reaching unprecedented levels precision. In this paper, we provide estimation JUNO sensitivity 7Be, pep, CNO that can be obtained...
The elastic scattering of $^{10}\mathrm{Be}$ on $^{208}\mathrm{Pb}$ has been measured over a range energies near the nominal Coulomb barrier. An excitation function for total reaction cross section is obtained from elastic-scattering angular distributions and compared with existing fusion data. Comparisons are also made fusion, transfer∕breakup, data $^{9}\mathrm{Be}$ incident $^{209}\mathrm{Bi}$. A strong enhancement in sub-barrier $^{9}\mathrm{Be+}^{209}\mathrm{Bi}$ relative to...
By designing a cascaded laser wakefield accelerator, high-quality monoenergetic electron beams (e beams) with peak energies of 340–360 MeV and rms divergence <0.3 mrad were produced. Based on this the e-beam betatron radiation spectra measured exactly via single-photon counting technique to diagnose transverse emittance in single shot. The size was estimated be ∼0.35 μm by comparing X-ray analytical model synchrotron-like radiation. combining energy divergence, normalized as low 56...