http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Tanoue Shota,Nakaura Takeshi,Nagayama Yasunori,Uetani Hiroyuki,Ikeda Osamu,Yamashita Yasuyuki 대한영상의학회 2021 Korean Journal of Radiology Vol.22 No.6
Objective: To evaluate the usefulness of virtual monochromatic images (VMIs) obtained using dual-layer dual-energy CT (DL-DECT) for evaluating brain tumors. Materials and Methods: This retrospective study included 32 patients with brain tumors who had undergone non-contrast head CT using DL-DECT. Among them, 15 had glioblastoma (GBM), 7 had malignant lymphoma, 5 had high-grade glioma other than GBM, 3 had low-grade glioma, and 2 had metastatic tumors. Conventional polychromatic images and VMIs (40–200 keV at 10 keV intervals) were generated. We compared CT attenuation, image noise, contrast, and contrast-to-noise ratio (CNR) between tumor and white matter (WM) or grey matter (GM) between VMIs showing the highest CNR (optimized VMI) and conventional CT images using the paired t test. Two radiologists subjectively assessed the contrast, margin, noise, artifact, and diagnostic confidence of optimized VMIs and conventional images on a 4-point scale. Results: The image noise of VMIs at all energy levels tested was significantly lower than that of conventional CT images (p < 0.05). The 40-keV VMIs yielded the best CNR. Furthermore, both contrast and CNR between the tumor and WM were significantly higher in the 40 keV images than in the conventional CT images (p < 0.001); however, the contrast and CNR between tumor and GM were not significantly different (p = 0.47 and p = 0.31, respectively). The subjective scores assigned to contrast, margin, and diagnostic confidence were significantly higher for 40 keV images than for conventional CT images (p < 0.01). Conclusion: In head CT for patients with brain tumors, compared with conventional CT images, 40 keV VMIs from DL-DECT yielded superior tumor contrast and diagnostic confidence, especially for brain tumors located in the WM.
Laminate veneer restorations using indirect resin composite
Tanoue, Naomi Korean Academy of Esthetic Dentistry 2013 Journal of the Korean Academy of Esthetic Dentistr Vol.22 No.1
This clinical report shows the importance of selecting appropriate materials in fabricating laminate veneer restorations. Such cases should be carefully selected to ensure bonding durability, providing consistently reliable prognosis.
Turbulent Combustion Properties of Outwardly Propagating Flames
Kimitoshi TANOUE,Fumio SHIMADA,Takashi NASU,Takayuki KAWASHIMA,Toshiro HAMATAKE 한국자동차공학회 2001 한국자동차공학회 Symposium Vol.- No.-
In engine combustion. turbulence generated by flow field motion such as swirl and flimbic, in the cylinder affects the propagating flame initiated by spark plug. resulting in the enhancement or the mass consumption rate or reactants as compared with the corresponding laminar flames. This in turn increases the heat release rate and thus power available from an engine of a given size. In this context the modeling and prediction or turbulent flame properties are or importance from the application point or view. In the present work, turbulent burning velocities or outwardly propagating premixed flames for methane and propane, which are representative of lighter or heavier hydrocarbon respectively, are investigated under the framework or flamelet concept which is based on the assumption that a chemical reaction occurs in thin layers that arc convected and distorted by the turbulent now field. In flamelet concept, the flame-flow interaction can be described in terms of total flame front surface and local flame structure. The local flame properties defined by the displacement speed and reaction rate depend on local hydrodynamic strain rate and curvature effects. Furthermore, the name response to flow divergence and curvature depends strongly on the Lewis number, characterized by the ratio of molecular diffusivity to thermal diffusivity. For non-unity Lewis numbers, differential diffusion of heat and species results in a certain sensitivity of the local flame structure to strain rate and curvature. Although this thermo-diffusive mechanism is well known for laminar names or for low stretched flames, recent studies have showed that it influences the local and global name structure of turbulent premixed combustion with high stretch. The primary objective of the present paper is to study experimentally the turbulent burning velocity and derive the fundamental equations in consideration of interaction between averaged name stretch and Lewis numbers<br/> <br/>
Red Emission from Eu-Implanted GaN
손창식,김성일,Akihiro Wakahara,Hisao Tanoue,최인훈,Mustuo Ogura,Yong Tae Kim,김영환 한국물리학회 2004 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.45 No.3
Eu ions were implanted into GaN epilayers on sapphire substrates. Sharp visible red emission lines due to inner 4f shell transitions for Eu3+ can be observed from the photoluminescence of Eu-implanted GaN. The 5D0 !7F2 transition produces the strongest red emission line. Minor lines are observed in the given spectral range. The lines at 546, 603, 624, and 667 nm are assigned to 5D1 !7F1 and 5D0 !7F1;2;3 transitions, respectively. These emission lines are little changed with varying temperature. Eu-implanted GaN can be a suitable material for application in red emission devices.