A5066966125- Advanced Radiotherapy Techniques
- Radiation Therapy and Dosimetry
- Radiation Detection and Scintillator Technologies
- Medical Imaging Techniques and Applications
- Nuclear Physics and Applications
- Radiation Dose and Imaging
- Management of metastatic bone disease
- Radiation Effects and Dosimetry
- Photonic and Optical Devices
- Advanced X-ray and CT Imaging
- Atomic and Subatomic Physics Research
- Liquid Crystal Research Advancements
- Photorefractive and Nonlinear Optics
- Endometrial and Cervical Cancer Treatments
- Advanced Fiber Laser Technologies
- Optical Polarization and Ellipsometry
- Optical Coatings and Gratings
- Electron Spin Resonance Studies
- Advanced Fiber Optic Sensors
- Radiomics and Machine Learning in Medical Imaging
- Advances in Oncology and Radiotherapy
- Nuclear reactor physics and engineering
- X-ray Spectroscopy and Fluorescence Analysis
- Ocular Oncology and Treatments
- Optical Systems and Laser Technology
Chungnam National University Hospital
2018-2025
Chungnam National University
2021-2024
Korea University
2015-2024
National Medical Center
2011-2018
National Cancer Center
2010-2015
Dongnam Institute of Radiological & Medical Sciences
2015
Korea Institute of Radiological and Medical Sciences
2015
Asan Medical Center
2015
McLaren Regional Medical Center
2015
Korean Society of Medical Ultrasound
2013
This study investigates the crosslinking dynamics and swelling properties of pH-responsive poly(ethylene glycol) (PEG)/poly(acrylic acid) (PAA) interpenetrating polymer network (IPN) hydrogels. These hydrogels feature denser crosslinked networks compared to PEG single (SN) Fabrication involved a two-step UV curing process: First, forming PEG-SN using diacrylate (PEGDA) through UV-induced free radical polymerization reactions, then immersing them in PAA solutions with two different molar...
<title>Abstract</title> RAON currently provides diverse particle beams for research, including argon through the KoBRA beamline and 70 MeV proton successfully delivered by ISOL system. The demand biomedical research utilizing these is increasing. Before conducting studies, it essential to understand characteristics of perform dosimetry studies. This study aims characterize propose appropriate methodologies.
This study examined the dose response of an optically stimulated luminescence dosemeter (OSLD) to megavoltage photon and electron beams. A nanoDot™ was used measure OSLD. Photons 6–15 MV electrons 9–20 MeV were delivered by a Varian 21iX machine (Varian Medical System, Inc. Milpitas, CA, USA). The energy dependency <1 %. For 6-MV photons, linear until 200 cGy. superficial measurements revealed irradiation have angular dependency. has potential use as in vivo dosimetric tool that is...
This study aims to investigate a star shot analysis using three-dimensional (3D) gel dosimeter for the imaging and radiation isocenter verification of magnetic resonance linear accelerator (MR-Linac).A mixture methacrylic acid, gelatin, tetrakis (hydroxymethyl) phosphonium chloride, called MAGAT gel, was fabricated. One each Linac MR-Linac irradiated under six gantry angles. A 6 MV photon beam flattening filter free were delivered two gels EBT3 films. MR images acquired by with clinical...
The feasibility of proton minibeam radiation therapy (pMBRT) using a multislit collimator (MSC) and scattering device was evaluated for clinical use at facility. We fabricated, through Monte Carlo (MC) simulations, not only an MSC with high peak-to-valley dose ratio (PVDR) the entrance beam, to prevent toxicity, but also modulate PVDR in depth. slit width center-to-center distance diverging were 2.5 mm 5.0 large end, respectively, its thickness available field size 100 76 × 77.5 mm2,...
We have investigated the combined effect of tissue heterogeneity and its variation associated with geometric error in stereotactic body radiotherapy (SBRT) for lung cancer. The treatment plans eight cancer patients were calculated using effective path length (EPL) correction Monte Carlo (MC) algorithms, both having same beam configuration each patient. These two kinds individual then subsequently recalculated adding systematic random errors. In ordinary no offset, EPL calculations, compared...
The aim of this study is to develop a new method align the patient setup lasers in radiation therapy treatment room and examine its validity efficiency. laser alignment realized by device composed both metallic base plate few acrylic transparent plates. Except one, every has either crosshair line (CHL) or single vertical that used for alignment. Two holders radiochromic film insertion are prepared find isocenter. right positions can be found optically matching shadows all CHLs gantry head...
Background: The aim of the present study was to verify dosimetric accuracy two-dimensional (2D) in vivo rectal dosimetry using an endorectal balloon (ERB) with unfoldable EBT3 films for high-dose-rate (HDR) brachytherapy cervical cancer. clinical applicability technique discussed.Material and methods: ERB inflation makes unrolled, whereas its deflation them rolled. Patient-specific quality assurance (pQA) tests were performed 20 patient plans Ir-192 remote afterloading system a water-filled...
This paper discusses a coherence-gated three-dimensional imaging system based on photorefractive holography, which was applied to through turbid media with view developing biomedical instrumentation. A rapid response device doped 2,4,7-trinitro-9-fluorenylidene malononitrile used generate the hologram grating. The estimated depth resolution <TEX>$20{\mu}m$</TEX>, corresponds coherence length of light source. In this system, tomographic 3-dimensional object composed <TEX>$50{\mu}m$</TEX>...
We have estimated the secondary cancer risk (SCR) introduced by image-guided procedures during proton therapy. The physical dose from imaging radiation and corresponding organ equivalent were calculated for case of a lumbar spine patient. maximum delivered to patient procedure was be ~0.35% prescribed 46 Gy. However, this small substantially raised radiation-induced SCR ~8%. In addition, clinical benefit (improved accuracy procedure) costs (extra SCR) associated with quantitatively modelled...
The space-charge field built in a polymeric photorefractive polymer was calculated by simple method based on the oriented gas model. When anisotropic chromophores were exposed to an external field, they preferentially exhibit birefringence. Then, under illumination of two coherent beams and reoriented form grating. During formation grating, as well applied field. birefringence induced material electric determined measuring transmittance sample which is placed between crossed polarizers,...