A5101471952- Luminescence Properties of Advanced Materials
- Solid State Laser Technologies
- Glass properties and applications
- Photorefractive and Nonlinear Optics
- Colorectal Cancer Surgical Treatments
- Acoustic Wave Resonator Technologies
- Advanced Fiber Laser Technologies
- Radiomics and Machine Learning in Medical Imaging
- Radiation Detection and Scintillator Technologies
- Gastric Cancer Management and Outcomes
- Spectroscopy and Laser Applications
- Building materials and conservation
- Ferroelectric and Piezoelectric Materials
- Laser Design and Applications
- Colorectal Cancer Screening and Detection
- Medical Imaging and Analysis
- Advanced ceramic materials synthesis
- Crystal Structures and Properties
- Reservoir Engineering and Simulation Methods
- Esophageal Cancer Research and Treatment
- Smart Materials for Construction
- Synthesis and characterization of novel inorganic/organometallic compounds
- Ideological and Political Education
- Plasma Applications and Diagnostics
- Enzyme Structure and Function
Sun Yat-sen University
2021-2024
Sixth Affiliated Hospital of Sun Yat-sen University
2022-2024
Shanghai University
2011-2023
RWTH Aachen University
2023
Tongji University
2017-2021
Tohoku University
2015-2016
Chinese Academy of Sciences
2010-2012
Shanghai Institute of Ceramics
2010-2012
China Medical University
2011
Dalian Medical University
2007
Background Deep learning (DL) models can potentially improve prognostication of rectal cancer but have not been systematically assessed. Purpose To develop and validate an MRI DL model for predicting survival in patients with based on segmented tumor volumes from pretreatment T2-weighted scans. Materials Methods were trained validated retrospectively collected scans diagnosed between August 2003 April 2021 at two centers. Patients excluded the study if there concurrent malignant neoplasms,...
We observed two ultrabroadband near-infrared (NIR) luminescence bands around 1.2 and 1.5 μm in as-grown bismuth-doped CsI halide crystals, without additional aftertreatment. Dependence of the NIR emission properties on excitation wavelength measurement temperature was studied. Two kinds active centers subvalent bismuth color were demonstrated to coexist Bi:CsI crystal. The eye-safe band with an FWHM 140 nm lifetime 213 μs at room makes crystal promising applications ultrafast laser amplifier.
The absorption, excitation, and ultrabroadband near-infrared luminescence spectra of Bismuth were investigated in H(2)-annealed gamma-irradiated Bi:alpha-BaB(2)O(4)(alpha-BBO) single crystals, respectively. Energy-level diagrams the luminescent centers fixed. electronic transition energies active are basically consistent with multiplets free Bi(+) ions. minor difference energy-level ions Bi:alpha-BaB(2)O(4) crystals can be ascribed to local lattice environments. involved physical chemical...
Cr-doped GdScO3 single crystals were grown by the EFG method. Based on their absorption and emission spectras, crystal field strength parameters of octahedrally-coordinated Cr3+ ions determined: Dq = 1553 cm-1, B = 574 C = 3211 Dq/B = 2.71 for 0.5% Cr:GdScO3. Effective phonon energy was calculated to be 412 cm−1, Huang–Rhys factor 3.0. The spectra doped covered region from 650 nm 1100 nm, cross-section at 767 0.32×10−20 cm2. In comparison with other materials, Cr:GdScO3 has a short...
BACKGROUND: Accurate prediction of response to neoadjuvant chemoradiotherapy is critical for subsequent treatment decisions patients with locally advanced rectal cancer. OBJECTIVE: To develop and validate a deep learning model that based on the comparison paired magnetic resonance imaging before after predict pathological complete response. DESIGN: By capturing changes from images in 638 patients, we trained multitask (DeepRP-RC) also allowed simultaneous segmentation. Its performance was...
Bi-doped CsI crystals exhibited near-infrared ultra-broadband photoluminescence around 1216 nm and 1560 nm, depending on the bismuth doping levels, which were ascribed to Bi+ Bi2+ centers, respectively. The crystal chemistry of Bi3+ reduction dimer formation in lattice investigated. Thermal treatments including annealing quenching carried out study thermal behaviors two emission bands. evolution absorption spectra Bi:CsI indicating Bi-aggregation valence conversions under activation. process...
Er:GdScO 3 crystal was grown by the edge-defined film-fed (EFG) method for first time. The rocking curve showed that as-grown has a high crystalline quality. peak absorption cross section at 980 nm is 0.38×10 −20 cm 2 with full width half maximum (FWHM) of 19.5 and emission 2720 0.93×10 FWHM 149.0 nm. fluorescence lifetimes 4 I 11/2 13/2 were fitted to be 2.24 ms 4.57 ms, respectively. At inversion ratio P≥0.5, positive local gain cross-section 2.7 µm obtained. Continuous-wave laser...
The effects of cementitious materials used in the early conservation stony cultural heritage on sandstones have yet to be clarified. impact mechanical and physicochemical properties was investigated by designing for wet dry cycling neutral alkaline solutions (pure water, sodium hydroxide, calcium ordinary cement, low cement). sandstone examined before after cycles using X-ray fluorescence spectrometry (XRF), ion chromatography (IC), diffractometry (XRD) characterize deterioration material...
Dy:Lu2O3 was grown by the float-zone (Fz) method. According to absorption spectrum, Judd–Ofelt (JO) parameters Ω 2, 4, and 6 were calculated be 4.86 × 10−20 cm2, 2.02 1.76 respectively. The emission cross-section at 574 nm corresponding 4F9/2→6H13/2 transition 0.53 cm2. yellow (4F9/2→6H13/2 transition) blue (4F9/2→6H15/2 intensity ratio ranges up 12.9. fluorescence lifetime of 4F9/2 energy level measured 112.1 μs. These results reveal that is a promising material for use in lasers.
Visible laser has been widely used in data storage, optical communication, display, medical treatment, printing, and scientific research.With the development of commercial blue light LD, direct pumping rare-earth ions doped crystals have attracted a lot interests.Currently, visible mainly concentrat on Pr 3+ , Dy Tb Sm .Trivalent praseodymium (Pr ) is famous ion with extensive transitions region such as blue, green, red orange light.However, there still yellow emission which not covered by...
Ho 3+ , Pr : Sc 2 O 3 crystal was successfully grown by the TGT method. The spectroscopic properties of were analyzed. absorption cross section Ho, Pr: at 636 nm 1.58×10 –20 cm . J-O theory applied to analyze fluorescence 2.9 μm. intensity parameters Ω t (t=2,4,6), radiative transition rates, branching ratios and lifetime calculated. exhibited strong emission 2110 2864 with a stimulated 2.4 × 10 –21 4.2 respectively. 5 I 6 7 levels measured be 1.64 ms 5.74 ms. These results show that would...
Er3+ doped Lu2O3 single crystal with high optical quality was successfully grown by Floating zone (Fz) method. The spectral properties and Judd-Ofelt (JO) analysis were reported. absorption cross section at 971 nm 1.5 × 10–21 cm2. emission cross-section 1558 2742 calculated to be 2.20 10–20 cm2 3.22 cm2, respectively. fluorescence lifetime of 4I11/2 4I13/2 energy level fitted 1.59 ms 12.43 ms. Meanwhile, the positive gain achieved in μm 2.8 inversion ratio P = 0.5. low ratios indicate a...
Abstract Spectral properties and radiation damage in W, Mg Ca doped Bi 4 Ge 3 O 12 (W:BGO, Mg:BGO, Ca:BGO) crystals before after thermal treatment gamma‐ray (γ‐) or ultraviolet (UV) were studied. The absorption the photoluminescence (PL) spectra of BGO visible region measured. Before γ UV radiation, emission intensity W:BGO crystal is stronger than that pure at about 500 nm. After (10k Gy), intensities are all weaker under identically condition. However, exposure Gy). Thermal treated...