A5000806496- Optical Imaging and Spectroscopy Techniques
- Thermoregulation and physiological responses
- Infrared Thermography in Medicine
- Photoacoustic and Ultrasonic Imaging
- Color Science and Applications
- Non-Invasive Vital Sign Monitoring
- Industrial Vision Systems and Defect Detection
- Skin Protection and Aging
- Manufacturing Process and Optimization
- Surface Roughness and Optical Measurements
- Advanced Surface Polishing Techniques
- Digital Media and Visual Art
- Color perception and design
- Advanced Manufacturing and Logistics Optimization
- Textile materials and evaluations
- Spectroscopy Techniques in Biomedical and Chemical Research
- Cutaneous Melanoma Detection and Management
- Image Processing and 3D Reconstruction
- Cardiovascular and exercise physiology
- Dyeing and Modifying Textile Fibers
- Advanced Optical Imaging Technologies
- Advanced Numerical Analysis Techniques
- Cardiac and Coronary Surgery Techniques
- Optical Coherence Tomography Applications
- Medical Imaging Techniques and Applications
Miyazaki Agricultural Research Institute
2025
Muroran Institute of Technology
2013-2024
Yamagata University
2007
Kanazawa University
2002-2004
Kohnodai Hospital, National Center for Global Health and Medicine
1999
Tohoku Rosai Hospital
1991
In order to visualize human skin hemodynamics, we investigated a method that is specifically developed for the visualization of concentrations oxygenated blood, deoxygenated and melanin in tissue from digital RGB color images. Images total blood concentration oxygen saturation can also be reconstructed results blood. Experiments using tissue-like agar gel phantoms demonstrated ability quantitatively transition an dermis. vivo imaging chromophore hand are performed 14 subjects during upper...
This study investigated the effects of dietary fermented blueberry leaf tea on sleep quality through a 3-week double-blind randomized controlled trial.
We present the effects of spatiotemporal averaging processes on an estimation spectral reflectance in color digital holography using speckle illuminations. In this technique, fields emitted from a multimode fiber are used as both reference wave and wavefront illuminating object. The interference patterns two coherent waves for three wavelengths recorded holograms CCD camera. Speckle changed by vibrating vibrator, number acquired to average reconstructed images. After performing process,...
We propose a method to visualize the arterial inflow, vascular resistance, and venous capacitance in skin tissue from red, green, blue (RGB) digital color images. The inflow are visualized based on an increase rate of change total blood concentration during upper limb occlusion at pressure 50 mmHg. resultant with measured mean also provides image resistance human skin. acquired by well correlated those obtained conventional strain-gauge plethysmograph. correlation coefficients R between...
To perform a contactless plethysmographic imaging, we investigated method to estimate the concentrations of oxygenated and deoxygenated blood in human skin tissue from RGB images, based on Monte Carlo simulation.
Bright light therapy is a treatment modality for seasonal affective disorder and circadian rhythm disorders in which artificial of 2,500 lux or higher at the eye effective. Although short-wavelength visible more effective than long-wavelength light, it may be hazardous to retina. Recently, light-emitting diodes (LEDs) have been used as source bright apparatuses. We developed goggles equipped with LEDs source. The aim this study was examine efficacy safety our when emitting 10,000-lux its...
The bluish appearance of veins in the skin tissue was experimentally investigated by vivo and vitro measurements. color surface including inside evaluated spectrophotometry analysis CIEXYZ CIELAB colorimetric systems. successfully interpreted dominant wavelength difference. Results for experiments showed that degree depends on depth diameter blood vessels.
This paper presents experimental studies on diffuse reflectance spectra of blood in cylindrical glass vessels embedded the Intralipid solution as a skin tissue model, and also f human surfaces. The measured are mainly governed by absorption characteristics small amount added into medium. To evaluate quantitatively spectra, we employed color perception basis CIE x-y chromaticity diagram. Results for model were found to coincide with those veins tissue.
We have recently developed a portable light therapy apparatus for improvement of sleep quality and wakefulness. This technical note presents some preliminary experiments useful design evaluation apparatus.
ヒト皮膚組織の層状性構造を模擬した多層構造光学ファントムを開発した．多層構造皮膚モデルの各層における吸収体，散乱体，母材の体積分率を最適化することで，ヒト皮膚の可視領域分光反射率に類似した特性を実現した．また，作製したファントムの再現性と経時劣化を調べた．皮膚症例として慢性色素性紫斑を模擬した紫斑ファントムを作製し，その色合いの妥当性を確認した．
Skin spectral reflectance can be used for estimate optical properties of human skin tissue, but there is a potential problem. We investigated conditions producing similar spectra different point spread functions reflected intensity on the surface in framework Monte Carlo simulation.