A5026321183- Medical Imaging Techniques and Applications
- Advanced X-ray and CT Imaging
- Radiation Detection and Scintillator Technologies
- Radiomics and Machine Learning in Medical Imaging
- Boron and Carbon Nanomaterials Research
- Advanced Radiotherapy Techniques
- Machine Learning in Materials Science
- Force Microscopy Techniques and Applications
- nanoparticles nucleation surface interactions
- CCD and CMOS Imaging Sensors
- Electron and X-Ray Spectroscopy Techniques
- Lung Cancer Diagnosis and Treatment
- Nuclear Physics and Applications
- Ion-surface interactions and analysis
- Laser-Ablation Synthesis of Nanoparticles
- Atomic and Subatomic Physics Research
- Advanced Electron Microscopy Techniques and Applications
- Microstructure and mechanical properties
- Diamond and Carbon-based Materials Research
- Advanced MRI Techniques and Applications
- Advanced Materials Characterization Techniques
- Particle Detector Development and Performance
Ghent University
2017-2024
Kyushu University
2017
Long axial field-of-view (LAFOV) systems have a much higher sensitivity than standard (SAFOV) PET for imaging the torso or full body, which allows faster and/or lower dose imaging. Despite its very high sensitivity, current total-body (TB-PET) throughput is limited by patient handling (positioning on bed) and often shortage of available personnel. This factor, combined with system costs, makes it hard to justify implementation these many academic nearly all routine nuclear medicine...
Objective.We investigate the use of 3D convolutional neural networks for gamma arrival time estimation in monolithic scintillation detectors.Approach.The required data is obtained by Monte Carlo simulation GATE v8.2, based on a 50 × 16 mm3monolithic LYSO crystal coupled to an 8 readout array silicon photomultipliers (SiPMs). The electronic signals are simulated as sum bi-exponentional functions centered around photon detection times. We include various effects statistical fluctuations...
Abstract Background In preclinical settings, micro‐computed tomography (CT) provides a powerful tool to acquire high resolution anatomical images of rodents and offers the advantage in vivo non‐invasively assess disease progression therapy efficacy. Much higher resolutions are needed achieve scale‐equivalent discriminatory capabilities as those humans. High imaging however comes at expense increased scan times doses. Specifically, with longitudinal imaging, there concerns that dose...
Abstract Background Although a new generation of tomographs with longer axial field-of-view called total-body PET have been developed, they are not widely utilized due to their high cost compared conventional scanners. The newly designed walk-through scanner is introduced as high-throughput and cost-efficient alternative scanners, by making use flat panel geometry lower cost, depth-of-interaction capable, monolithic BGO detectors. main aim the presented study evaluate through Monte Carlo...
Abstract Objective. Time-of-flight positron emission tomography based on bismuth germanate (BGO) detectors is made possible due to fast of Cerenkov light. Only around 17 photons are produced per 511 keV photoelectric event, making high photon collection efficiency crucial for obtaining good time-of-flight capabilities. In this study, we investigate how different lateral and back surface finishes affect the timing performance in monolithic BGO. Approach. The study performed using GATE gamma...
Abstract Background This study evaluates the lesion contrast in a cost-effective long axial field of view (FOV) PET scanner, called walk-through (WT-PET). The scanner consists two flat detector panels covering entire torso and head, scanning patients an upright position for increased throughput. High-resolution, depth-of-interaction capable, monolithic technology is used to provide good spatial resolution enable detection smaller lesions. Methods Monte Carlo GATE simulations are conjunction...
Analysis of subpercent local strain is important for a deeper understanding nanomaterials, whose properties often depend on the strain. Conventional analysis has been performed by measuring interatomic distances from scanning transmission electron microscopy (STEM) images. However, remains challenge because peak positions in STEM images do not precisely correspond to real atomic due disturbing influences, such as random noise and image distortion. Here, we utilized an advanced data-driven...
This study investigates the integration of Artificial Intelligence (AI) in compensating lack time-of-flight (TOF) GE Omni Legend PET/CT, which utilizes BGO scintillation crystals.
Long-axial field-of-view (LAFOV) Positron Emission Tomography (PET) scanners provide high sensitivity, but throughput is limited because of time-consuming patient positioning. To enhance throughput, a novel Walk-Through PET (WT-PET) scanner has been developed, allowing patients to stand upright, supported by an adjustable headrest and hand supports. This study evaluates the degree motion in WT-PET system compares it with standard PET-CT. Three studies were conducted healthy volunteers...
Abstract Background: Although a new generation of tomographs with larger axial field view called total-body PET has been developed, they are not widely utilized due to their high cost compared conventional scanners. The walk-through scanner is introduced as high-throughput and cost-efficient alternative scanners, by making use flat-panel geometry lower cost, depth-of-interaction capable, monolithic BGO detectors. main aim the presented study evaluate system characteristics comparing it...
Journal Article Lattice Tetragonality and Local Strain Depending on Shape of Gold Nanoparticles Get access Kohei Aso, Aso Dept. Applied Quantum Physics Nuclear Engineering, Kyushu University, Fukuoka, Japan Corresponding author: kaso@nucl.kyushu-u.ac.jp Search for other works by this author on: Oxford Academic Google Scholar Jens Maebe, Maebe Solid State Sciences, Ghent Ghent, Belgium Tomokazu Yamamoto, Yamamoto Syo Matsumura JapanThe Ultramicroscopy Research Center, Microscopy...
Abstract Purpose: Positron Emission Tomography (PET) image quality can be improved by higher injected activity and/or longer acquisition time, but both may often not practical in preclinical imaging. Common radioactive doses (10 MBq) have been shown to cause deterministic changes biological pathways. Reducing the tracer shortening scan time inevitably results low-count acquisitions which poses a challenge because of inherent noise introduction. We present an image-based deep learning (DL)...
Metal nanoparticles have attracted attention as functional materials since they show unique properties different from that of bulk state. Their functions such catalytic are affected by lattice strain in nanoparticles. Therefore, precise characterization the seems to be highly important [1]. In this study, we characterized involved gold nanorods (GNRs) experimentally using drift-compensated HAADF-STEM [2]. The analysis a GNR indicated ~1 % expansion along its long axis [001] direction at both...