Nathaniel Clark

  • Multiple linear regression analysis using all variables as factors (Model 1) demonstrated that weight, BMI, and tidal volume were independently associated with the bilateral excursion of the diaphragms (all P < 0.05) after adjusting for other clinical variables, including age, gender, smoking history, height, VC, %VC, FEV1, FEV1%, and %FEV1. There…[Read more]

  • Figure 1. Flow diagram of the study population.Figure optionsDownload full-size imageDownload high-quality image (83 K)Download as PowerPoint slideImaging Protocol of Dynamic Chest Radiology (“Dynamic X-Ray Phrenicography”)Posteroanterior dynamic chest radiography (“dynamic X-ray phrenicography”) was performed using a prototype system (Konica…[Read more]

  • The correlation between the zirconia content and the efficiency of substitutional N incorporation was noticed. It was supposed that the distortion of Ті4+О2 lattice with the advent of Ti3+ states occurred due to the larger radius of zirconium ions (RZr4+ = 0.720 Å as compared to RTi4+ = 0.650 Å). The relative high stability of Ti3+ states was as…[Read more]

  • The purpose of this study was to evaluate diaphragmatic motion during tidal breathing in a standing position in a health screening center cohort using dynamic chest radiography in association with participants’ demographic characteristics.Materials and MethodsStudy PopulationThis cross-sectional study was approved by the institutional review…[Read more]

  • Image AnalysisThe diaphragmatic motions on sequential chest radiographs (dynamic image data) during tidal breathing were analyzed using prototype software (Konica Minolta, Inc.) installed in an independent workstation (Operating system: Windows 7 Pro SP1; Microsoft, Redmond WA; CPU: Intel Core i5-5200U, 2.20 GHz; memory 16 GB). The edges of the…[Read more]

  • Nathaniel Clark posted an update 1 week ago

    Image AnalysisThe diaphragmatic motions on sequential chest radiographs (dynamic image data) during tidal breathing were analyzed using prototype software (Konica Minolta, Inc.) installed in an independent workstation (Operating system: Windows 7 Pro SP1; Microsoft, Redmond WA; CPU: Intel Core i5-5200U, 2.20 GHz; memory 16 GB). The edges of the…[Read more]

  •  A representative video of sequential chest radiographs obtained by chest dynamic radiography for the motion of the diaphragms (“dynamic X-ray phrenicography”). A board-certified radiologist placed a point of interest (red point) on the highest point of each NHS-LC-Biotin on the radiograph at the resting end-expiratory position. These points…[Read more]

  • Figure 2. Representative sequential chest radiographs and the graphs of excursion and peak motion of the diaphragms obtained by chest dynamic radiography (“dynamic X-ray phrenicography”). (a) Radiograph of the resting end-expiratory position. (b) Radiograph of the resting end-inspiratory position. (c) Graph showing the vertical excursions and the…[Read more]

  • Nathaniel Clark posted an update 2 weeks ago

    The synthesis of such α-Cr2O3 nano-spheres was performed with reagent grade chemicals. The general methodology is described in previous contributions [32] ;  [33] and illustrated in Fig. 4a. An aqueous solution (MilliQ, 18.2 MΩ) of 1 mM of chromium potassium sulfate dodecahydrate (KCr(SO4)2·12H2O) mixed with polyvinylpyrrolidone (PVP) as a s…[Read more]

  • Nathaniel Clark became a registered member 2 weeks ago