Publications by authors named "Kosuke Nakamura"

Conventional camera modules use a mechanical system comprising moving parts to change the focal length of the lens by moving it along the optical axis, increasing the volume of the camera. Here, the potential of compact variable-focus lenses was examined to enhance response speed and robustness via a combination of viscoelastic gel films, liquids, and acoustic radiation forces. The optical properties of the lenses were evaluated using a wavefront sensor.

View Article and Find Full Text PDF

Aim: Cirrhotic cardiomyopathy (CCM) is a significant complication of liver cirrhosis; however, its prevalence and impact in Asian populations remain unclear. The aim of this study was to assess the prevalence of CCM in Japanese patients with liver cirrhosis and to evaluate its impact on clinical outcomes.

Methods: In this retrospective study, 80 patients with liver cirrhosis confirmed using transient elastography (liver stiffness ≥ 12.

View Article and Find Full Text PDF

Purpose: Pachychoroid spectrum diseases reportedly progress from central serous chorioretinopathy (CSC) to pachychoroid neovasculopathy (PNV) and polypoidal choroidal vasculopathy (PCV). We investigated and compared choroidal thicknesses in the macular and peripheral areas among eyes with CSC, PNV, and PCV, as well as in normal control eyes.

Study Design: Retrospective case-control study.

View Article and Find Full Text PDF

Both atropisomers of 3-(2-hydroxyphenyl)quinazolin-4-one derivatives were prepared through optical resolution based on the formation of diastereomers with ()-lactoyl chiral pool. Their rotational stabilities in solution depended to a considerable extent on which solvent was used. In alcohol and DMSO solvents, higher rotational stability was observed.

View Article and Find Full Text PDF

Purpose: We previously reported 1-year outcomes of a treat-and-extend (TAE) regimen with intravitreal faricimab (IVF) for treatment-naïve neovascular age-related macular degeneration (nAMD). Herein, we evaluated the second-year results of this TAE regimen with IVF in eyes completing the first-year treatment.

Study Design: Retrospective, interventional case series.

View Article and Find Full Text PDF

Purpose: To evaluate the treatment outcomes of switching to intravitreal brolucizumab (IVBr) for neovascular age-related macular degeneration (nAMD) which did not achieve a dry macula even with 4- or 8-week intervals of intravitreal faricimab (IVF).

Study Design: Retrospective, interventional case series.

Methods: We retrospectively studied 33 eyes of 33 consecutive patients with nAMD who switched to IVBr from IVF, assessing best corrected visual acuity (BCVA), foveal thickness (FT), central choroidal thickness (CCT), and exudative status at baseline and after the switch.

View Article and Find Full Text PDF
Article Synopsis
  • Accurate assessment of left ventricular filling pressure in patients with atrial fibrillation is challenging, but a new scoring system called VMT score can visually assess valve opening timings to evaluate this pressure.
  • In a study with 119 patients, the VMT score showed a strong correlation with elevated pulmonary arterial wedge pressure and had a diagnostic accuracy of 87%, outperforming traditional Doppler methods.
  • The findings were validated in a separate group of 189 patients, confirming that a VMT score of 2 or higher indicates significant left ventricular filling pressure elevation, making it a potentially valuable tool in clinical settings.
View Article and Find Full Text PDF

To assess the risk of food allergies in foods processed under the Japanese food labeling system, estimating exposure to hidden allergens is necessary. We assessed exposure to egg protein in foods processed according to the Japanese food labeling system. First, we estimated the concentration distribution of egg protein by Bayesian methods using data from the literature and the measurement of food products with precautional declarations in the labeling margin.

View Article and Find Full Text PDF

Rapid analysis of multiple food allergens is required to confirm the appropriateness of food allergen labelling in processed foods. This study aimed to develop a rapid and reliable method to simultaneously detect trace amounts of seven food allergenic proteins (wheat, buckwheat, milk, egg, crustacean, peanut, and walnut) in processed foods using LC-MS/MS. Suspension-trapping (S-Trap) columns and on-line automated solid-phase extraction were used to improve the complex and time-consuming pretreatment process previously required for allergen analysis using LC-MS/MS.

View Article and Find Full Text PDF
Article Synopsis
  • - The study aimed to assess which Doppler profile (hepatic vein systolic filling fraction or SVC peak systolic/diastolic ratio) better indicated elevated right atrial pressure (RAP) in patients with cardiovascular diseases.
  • - It involved 193 patients, measuring Doppler profiles alongside cardiac catheterization, revealing that both profiles inversely correlated with RAP; however, SVC-S/D provided significantly better diagnostic accuracy than HV-SFF.
  • - Findings indicate that SVC-S/D is a more reliable measure for diagnosing elevated RAP compared to HV-SFF, with SVC-S/D showing additional diagnostic value beyond estimated RAP from inferior vena cava morphology.
View Article and Find Full Text PDF

Stickler syndrome is a genetic disorder characterized by collagen abnormalities leading to various ocular manifestations, such as retinal detachment. We present two cases of siblings clinically diagnosed with Stickler syndrome who exhibited retinal detachment. Case 1, a seven-year-old girl, and case 2, her 14-year-old brother, both displayed severe myopia and other clinical signs consistent with Stickler syndrome.

View Article and Find Full Text PDF

Purpose: Intervortex venous anastomosis is widely recognized as compensating for vortex vein congestion in pachychoroid spectrum diseases. However, determining the blood flow direction within the compensated drainage route is often challenging. Herein, we investigated the morphological patterns of vortex veins in eyes showing retrograde pulsatile vortex venous flow.

View Article and Find Full Text PDF
Article Synopsis
  • Atrial amyloidosis is linked to amyloid deposition of atrial natriuretic peptide (ANP) and transthyretin (TTR), with TTR being the main protein associated with cardiac amyloidosis.
  • A 73-year-old man with heart failure, atrial fibrillation, and severe mitral regurgitation was diagnosed with ATTR-CM after various tests showed signs of cardiac amyloidosis, leading to surgical interventions.
  • Histological analysis revealed coexisting ANP and TTR amyloid deposits in the left atrial tissue, suggesting both contribute to the development of atrial amyloidosis and increase the risk of atrial fibrillation.
View Article and Find Full Text PDF

The reverse-yield factor (RF) database was developed for qualitatively and quantitatively disaggregating Japanese composite foods into raw primary commodity (RPC) ingredients. Representative equations for four types (dried, salted, fermented and mixed foods) were developed to calculate RFs using the food content and composition data for composite foods listed in the Standard Tables of Food Composition in Japan-2020-(STFCJ), published by the Ministry of Education, Culture, Sports, Science and Technology of Japan. Out of 1150 composite foods identified in the STFCJ, RFs for 54 dried, 41 salted, 40 fermented and 818 mixed foods were obtained.

View Article and Find Full Text PDF

Background: The assessment of left ventricular (LV) filling pressure (FP) is important for the management of aortic stenosis (AS) patients. Although, it is often restricted for predict LV FP in AS because of mitral annular calcification and a certain left ventricular hypertrophy. Thus, we tested the predictive ability of the algorithm for elevated LV FP in AS patients and also applied a recently-proposed echocardiographic scoring system of LV FP, visually assessed time difference between the mitral valve and tricuspid valve opening (VMT) score.

View Article and Find Full Text PDF

A novel regularized elastic net regression model was developed to predict processing factor (PF) for pesticide residues, which represents a change in the residue levels during food processing. The PF values for tomato juice, wet pomace and dry pomace in the evaluations and reports published by the Joint FAO/WHO Meeting on Pesticide Residues significantly correlated with the physicochemical properties of pesticides, and subsequently the correlation was observed in the present tomato processing study. The elastic net regression model predicted the PF values using the physicochemical properties as predictor variables for both training and test data within a 2-fold range for 80-100% of the pesticides tested in the tomato processing study while overcoming multicollinearity.

View Article and Find Full Text PDF

Purpose: To evaluate 1-year outcomes of loading phase treatment followed by maintenance therapy using a treat-and-extend (TAE) regimen with intravitreal faricimab for neovascular age-related macular degeneration (nAMD).

Study Design: Retrospective, interventional case series.

Methods: We retrospectively studied 40 eyes of 38 consecutive patients with treatment-naïve nAMD, assessing best-corrected visual acuity (BCVA), foveal thickness, central choroidal thickness (CCT), total number of injections over 1 year, and intended injection interval at the last visit.

View Article and Find Full Text PDF

We investigated the assessment of blood flow within polypoidal lesions using optical coherence tomography angiography (OCTA) to determine intravitreal brolucizumab (IVBr) efficacy for treating polypoidal choroidal vasculopathy (PCV). We retrospectively studied 46 eyes with PCV that completed 1-year IVBr treatment. Blood flow signals within polypoidal lesions were evaluated using OCTA after loading-phase treatment, and 1-year outcomes were compared between eyes in which blood flow signals disappeared versus persisting.

View Article and Find Full Text PDF

Aim: The present study aimed to investigate the impact of mild tricuspid regurgitation (TR) on the exercise capacity or clinical outcomes in patients with chronic heart failure (CHF).

Methods And Results: The study enrolled 511 patients with CHF who underwent cardiopulmonary exercise testing (CPET) between 2013 and 2018. The primary outcome was a composite of heart failure hospitalization and death.

View Article and Find Full Text PDF

We retrospectively studied 12 eyes of 12 patients with central serous chorioretinopathy (CSC) to investigate choroidal thickness changes following half-fluence photodynamic therapy (PDT) using widefield choroidal thickness maps obtained by optical coherence tomography (OCT). Additionally, we assessed the relationship between choroidal thickness changes and the regional vortex veins as visualized on widefield en face OCT of the choroid. Pre-treatment en face images of the choroidal vasculature were superimposed on subtracted choroidal thickness maps before and 3 months after half-fluence PDT.

View Article and Find Full Text PDF

Less data are available regarding the impact of cardiac power output on exercise capacity or clinical outcome in patients with chronic heart failure (CHF). The study enrolled 280 consecutive patients with CHF referred for cardiopulmonary exercise testing and right-sided heart catheterization between 2013 and 2018. The primary outcome was composite of heart failure hospitalization or death.

View Article and Find Full Text PDF

Background: Duplicated left gastric artery (LGA) is a rare anomaly. With an incidence of only 0.4%, its clinical significance remains largely unrecognized.

View Article and Find Full Text PDF

Background: Although global longitudinal strain (GLS) is recognized as a sensitive marker of intrinsic left ventricular (LV) dysfunction, its afterload dependency has also been pointed. We hypothesized that decrease in GLS during handgrip exercise could be more sensitive marker of intrinsic myocardial dysfunction.

Methods: Handgrip exercise-stress echocardiography was performed in 90 cardiovascular disease patients with preserved LV ejection fraction.

View Article and Find Full Text PDF

[Cu(I)(dmp)(P)] (dmp = 2,9-dimethyl-1,10-phenanthroline derivatives; P = phosphine ligand) is one of the most promising photosensitizers used in a photo-catalytic system for reducing CO, for which the quantum yield is as high as 57%. In this work, time-resolved emission spectra of Cu(I) complexes in solutions were investigated using femtosecond fluorescence up-conversion and nanosecond time-resolved emission spectroscopic systems. The temporal profiles of emission intensities less than 10 ps in acetonitrile solution were reproduced using a tri-exponential function with three-time constants of 0.

View Article and Find Full Text PDF