The optical attenuation coefficient (OAC) reflects the properties of various tissues or same type under different physiological conditions. Quantitative measurement OAC from coherence tomography (OCT) signals can provide additional information and increase potential for OCT applications. We present an optimized depth-resolved estimation (ODRE) method that derives a precise mapping between measured signal OAC. In contrast to previous (DRE) methods, estimate in any depth range ignore whether...

Abstract Graphitic carbon nitride (g‐C 3 N 4 ) has received much attention as a metal‐free photocatalyst for dye degradation and sterilization. However, the low photocatalytic bactericidal activity difficulty in recycling have limited its applications. Here, oxidatively modified g‐C grafted with polyethyleneimine (PEI) nanofiber membranes (PVA/PEI‐OCN) was reported to enhance activity. The modification by PEI grafting could reduce recombination rate of photogenerated carriers lead more...

In this work, a series of chitosan (CS)-grafted carbon oxynitride (OCN) nanoparticles (denoted as CS-OCN) were successfully synthesized for the first time by thermal polycondensation and subsequent esterification. The structure photocatalytic performance CS-OCN investigated. XPS spectra CS-OCN-3 showed presence amino bonds. optimal degradation efficiency could reach 94.3% within 390 min, while photocurrent response intensity was about 150% more than that pure OCN. improved may be mainly...

Abstract The visible light catalytic antibacterial nanofiber membranes as a novel functional material were designed to solve the problem of bacterial infection and water pollution. In this work, oxygenated graphite carbon nitride nanosheets (O‐g‐C 3 N 4 ) with 12% oxygen content synthesized through thermal polycondensation followed by chemical oxidation. Exfoliation dispersion O‐g‐C strongly enhanced compared pristine g‐C due rich hydrophilic carboxyl hydroxyl groups. amount ROS generated...

This paper demonstrates a novel photoacoustic endoscopy method using phase-shift interferometry (PSI) for signal detection. The employs three-step phase-shifting technique to detect changes in light intensity induced by the initial pressure. enables identical optical structures excitation and detection, simplifying probe design facilitating miniaturization. proposed eliminates need acoustic coupling agents, enabling non-contact We employ mitigate influence of random phase variations caused...

SignificanceThe deep cortical microvasculature is closely linked to the pathogenesis of Alzheimer's disease (AD). However, tail artifacts from superficial vessels often interfere with detecting in optical coherence tomography angiography (OCTA) imaging. A more accurate method assess vasculature crucial for understanding its relationship AD onset.AimWe aim reduce vessel OCTA imaging and improve visualization analysis an mouse model.ApproachWe introduced attenuation coefficient decorrelation...

ABSTRACT Organic dyes and drug‐resistant bacteria are posing a potential threat to human health ecology. Graphite phase carbon nitride (g‐C 3 N 4 ), because of its good light absorption performance, stability, suitable energy band structure, has applications in photocatalysis. Herein, oxygen doped (O‐CN) MXene Ti C 2 (TC) were physically mixed form heterojunction. The effect the ratio between O‐CN TC on photocatalytic performance was studied. Then O‐CN/TC‐2 dispersed PVA solution....

Optical coherence tomography (OCT) angiography is a noninvasive imaging modality that produces volumetric views of blood flow perfusion in vivo with resolution at capillary level, which has been widely adopted to monitor cerebral status after stroke experimental settings. Accurate quantification from OCT angiograms important for understanding the vascular pathophysiology and assessing treatment ischemic stroke. Quantification vessels faces some problems; one uneven backscatter (which causes...

Infrared thermography (IRT), as a noncontact tool for temperature measurement, is widely applied in the study of acupuncture modernization. The aim this was to assess intra- and interrater reliability infrared image analysis facial acupoints subjects with paralysis determine factors influencing variability measured values. A total 26 patients on one side, aged 53 years, participated voluntarily study. Facial thermal images all participants were analyzed by two trained raters at different...

Facial temperature distribution in healthy people shows contralateral symmetry, which is generally disrupted by facial paralysis. This study aims to develop a quantitative thermal asymmetry analysis method for early diagnosis of paralysis infrared images. First, improve the reliability image analysis, regions interest (ROIs) were segmented using corner and edge detection. A new feature was then defined maximum minimum temperature, it combined with texture represent ROIs. Finally, Minkowski...

Facial paralysis is a condition causing decreased movement on one side of the face. A quantitative, objective, and reliable assessment method would be an invaluable tool for clinicians treating patients with this condition. This paper presents novel framework objective facial based patient infrared thermal image. feature localization discussed temperature distribution specificity edge detection. An algorithm presented to process image obtain features in relevant regions. Three classification...

We introduce a method to extract the photoacoustic (PA) signal from contrast reduction of interference spectrum acquired by spectral domain optical coherence tomography (SDOCT). This all-optical detection is achieved in noncontact manner directly on water surface covered sample using its specular reflection. During SDOCT exposure, phase keeps shaking according vibration induced PA excitation. results an which quantified fast Fourier transform (FFT) for imaging. A tungsten filament, asparagus...

Abstract With the increase of drug‐resistant bacteria and limitations traditional antibacterial methods, photocatalytic inhibition has received widespread attention as a novel method. In this paper, poly(1‐vinyl‐3‐ethylimidazolium tetrafluoroborate) composite oxygenated carbon nitride (PBF‐OCN) were prepared by in situ free radical polymerization using 1‐vinyl‐3‐ethylimidazolium tetrafluoroborate OCN. The results showed that light absorption ability electron hole separation rate PBF‐OCN...

We proposed a non-contact photoacoustic (PA) detection method using spectral domain optical coherence tomography (SDOCT). Two interference spectrums (A-lines) were acquired before and after the PA excitation with SDOCT. signal propagated within sample causing vibration. The vibration inner introduced phase change between two A-lines. Thus, can be detected by evaluating difference in Based on method, an OCT-PAM dual-mode imaging system was constructed. In system, SDOCT served as unit for PAM....

Inquiring diagnosis of Traditional Chinese medicine is one the basic methods for diagnosing disease. Inquiry can collect most extensive clinical information patient. It get many disease which can't be got by any other method. This paper presents a complex system model inquiring based on combination formal concept analysis theory and medicine. Computerized gets scores symptoms syndrome elements through voice interactive way between human system. In accordance with principles analysis,...

Cerebral edema is a serious complication of ischemic cerebrovascular disease and mannitol commonly used dehydrating agent for relieving cerebral edema. However, the state surrounding vascular perfusion level during treatment remains unclear, which affects clinical application medicine. In this paper, we demonstrated role swept-source optical coherence tomography (OCT) in evaluation efficacy using mouse models. The OCT-based angiography attenuation imaging technology were to obtain at...