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4,992 results on '"Ohno, Y."'

209. Relationship Between Severity of Adverse Events of Afatinib and Its Pharmacokinetics and Pharmacogenomics for EGFR Mutation-Positive Non-Small Cell Lung Cancer

Author

Gomyo, T., primary, Iihara, H., additional, Hayashi, H., additional, Endo, J., additional, Ito, F., additional, Yansase, K., additional, Kaito, D., additional, Sasaki, Y., additional, Sakai, C., additional, Fukuda, Y., additional, Hirose, C., additional, Sugiyama, T., additional, Suzuki, A., additional, and Ohno, Y., additional

Published
2019
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227. Growth and properties of (Ga,Mn)As films with high Mn concentration

Author

Takamura, K., Matsukura, F., Ohno, Y., and Ohno, H.

Subjects
Thin films -- Magnetic properties, Physics
Abstract

It has been possible to use low temperature molecular beam epitaxy to grow (Ga,Mn)As films with high nominal Mn concentration. It is concluded that the growth of high Mn concentration epitaxial (Ga,Mn)As could be possible by pushing forward the material science of this material.

Published
2001

233. ASCA solid state imaging spectrometer observations of O stars

Author

Corcoran, M. F, Waldron, W. L, Macfarlane, J. J, Chen, W, Pollock, A. M. T, Torrii, K, Kitamoto, S, Muira, N, Egoshi, M, and Ohno, Y

Subjects
Astronomy
Abstract

We report ASCA Solid State Imaging Spectrometer (SIS) x-ray observations of the O stars delta Ori and lambda Ori. The energy resolution of the SIS allows us to resolve features in the O star x-ray spectra which are not apparent in spectra obtained by x-ray spectrometers with lower energy resolution. SIS spectra from both stars show evidence of line emission, suggesting the thermal nature of the x-ray source. However, the observed line strengths are different for the two stars. The observed stellar x-ray spectra are not well described by isothermal models although absorbed thermal emission models with two or more temperatures can provide an adequate fit to the data. For both stars we present evidence of absorbing columns significantly larger than the known ISM columns, indicative of absorption by a circumstellar medium, presumably the stellar winds. In addition, the lambda Ori spectrum shows the presence of emission at energies greater than 3 keV which is not seen in the delta Ori spectrum.

Published
1995

234. ASCA solid state imaging spectrometer observations of O stars

Author

Corcoran, M. F, Waldron, W. L, Macfarlane, J. J, Chen, W, Pollock, A. M. T, Torii, K, Kitamoto, S, Miura, N, Egoshi, M, and Ohno, Y

Subjects
Astrophysics
Abstract

We report ASCA Solid State Imaging Spectrometer (SIS) X-ray observations of the O stars delta Ori and lambda Ori. The energy resolution of the SIS allows us to resolve features in the O star X-ray spectra which are not apparent in spectra obtained by X-ray spectrometers with lower energy resolution. SIS spectra from both stars show evidence of line emission, suggesting the thermal nature of the X-ray source. However, the observed line strengths are different for the two stars. The observed stellar X-ray spectra are not well described by isothermal models although absorbed thermal emission models with two or more temperatures can provide an adequate fit to the data. For both stars we present evidence of absorbing columns significantly larger than the known Interstellar Medium (ISM) columns, indicative of absorption by a circumstellar medium, presumably the stellar winds. In addition, the lambda Ori spectrum shows the presence of emission at energies greater than 3 keV which is not seen in the delta Ori spectrum.

Published
1994
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235. Pulmonary MR angiography and perfusion imaging—A review of methods and applications

Author

Johns, C.S., Swift, A.J., Hughes, P.J.C., Ohno, Y., Schiebler, M., and Wild, J.M.

Abstract

The pulmonary vasculature and its role in perfusion and gas exchange is an important consideration in many conditions of the lung and heart. Currently the mainstay of imaging of the vasculature and perfusion of the lungs lies with CT and nuclear medicine perfusion scans, both of which require ionizing radiation exposure. Improvements in MRI techniques have increased the use of MRI in pulmonary vascular imaging. Here we review MRI methods for imaging the pulmonary vasculature and pulmonary perfusion, both using contrast enhanced and non-contrast enhanced methodology.\ud \ud In many centres pulmonary MR angiography and dynamic contrast enhanced perfusion MRI are now well established in the routine workflow of patients particularly with pulmonary hypertension and thromboembolic disease. However, these imaging modalities offer exciting new directions for future research and clinical use in other respiratory diseases where consideration of pulmonary perfusion and gas exchange can provide insight in to pathophysiology.

Published
2017

236. for Suspected Pulmonary Thromboembolism

Author

Ohno, Y, Yoshikawa, T, Kishida, Y, Seki, S, and Karabulut, N

Subjects
thromboembolism, CT, deep venous thrombosis, MR angiography, MRI, pulmonary
Abstract

OBJECTIVE. This article discusses the basics of unenhanced MR angiography (MRA) and MR venography (MRV), time-resolved contrast-enhanced (CE) MRA and dynamic first-pass CE perfusion MRI, and unenhanced and CE MRV, in addition to assessing the clinical relevance of these techniques for evaluating patients with suspected pulmonary thromboembolism and deep venous thrombosis.

Published
2017

237. Unenhanced and Contrast-Enhanced MR Angiography and Perfusion Imaging for Suspected Pulmonary Thromboembolism

Author

Ohno Y, Yoshikawa T, Kishida Y, Seki S, and Karabulut N

Subjects
Contrast Media, Diagnosis, Differential, Humans, Image Enhancement/*methods, Magnetic Resonance Angiography/*methods, Phlebography/*methods, Pulmonary Embolism/*diagnostic imaging, Reproducibility of Results, Sensitivity and Specificity, Venous Thrombosis/*diagnostic imaging
Abstract

OBJECTIVE: This article discusses the basics of unenhanced MR angiography (MRA) and MR venography (MRV), time-resolved contrast-enhanced (CE) MRA and dynamic first-pass CE perfusion MRI, and unenhanced and CE MRV, in addition to assessing the clinical relevance of these techniques for evaluating patients with suspected pulmonary thromboembolism and deep venous thrombosis. CONCLUSION: Since the 1990s, the efficacy of MRA or MRV and dynamic perfusion MRI for patients with suspected pulmonary thromboembolism and deep venous thrombosis has been evaluated. On the basis of the results of single-center trials, comprehensive MRI protocols, including pulmonary unenhanced and CE MRA, perfusion MRI, and MRV, promise to be safe and time effective for assessing patients with suspected pulmonary thromboembolism, although future multicenter trials are required to assess the real clinical value of MRI.

Published
2017

238. Unenhanced and contrast-enhanced MR angiography and perfusion imaging for suspected pulmonary thromboembolism

Author

Ohno, Y., Yoshikawa, T., Kishida, Y., Seki, S., and Karabulut, Nevzat

Subjects
magnetic resonance venography, diagnostic imaging, Contrast Media, multidetector computed tomography, Review, digital subtraction angiography, Sensitivity and Specificity, deep vein thrombosis, single photon emission computed tomography, Diagnosis, Differential, contrast medium, time resolved contrast enhanced magnetic resonance angiography, differential diagnosis, Humans, human, image enhancement, procedures, intermethod comparison, reproducibility, computed tomographic angiography, phlebography, MR angiography, Venous Thrombosis, reliability, Pulmonary thromboembolism, predictive value, magnetic resonance angiography, three dimensional imaging, echography, Reproducibility of Results, arterial spin labeling, gadolinium pentetate, perfusion weighted imaging, vein thrombosis, nuclear magnetic resonance scanner, Deep venous thrombosis, contrast enhancement, diagnostic accuracy, diagnostic value, Pulmonary Embolism, lung embolism, dynamic first pass contrast enhanced perfusion magnetic resonance imaging, CT, MRI
Abstract

OBJECTIVE. This article discusses the basics of unenhanced MR angiography (MRA) and MR venography (MRV), time-resolved contrast-enhanced (CE) MRA and dynamic firstpass CE perfusion MRI, and unenhanced and CE MRV, in addition to assessing the clinical relevance of these techniques for evaluating patients with suspected pulmonary thromboembolism and deep venous thrombosis. CONCLUSION. Since the 1990s, the efficacy of MRA or MRV and dynamic perfusion MRI for patients with suspected pulmonary thromboembolism and deep venous thrombosis has been evaluated. On the basis of the results of single-center trials, comprehensive MRI protocols, including pulmonary unenhanced and CE MRA, perfusion MRI, and MRV, promise to be safe and time effective for assessing patients with suspected pulmonary thromboembolism, although future multicenter trials are required to assess the real clinical value of MRI. © 2017 American Roentgen Ray Society.

Published
2017

247. Anatomical features and management of bioresorbable vascular scaffolds failure: A case series from the GHOST registry

Author

Longo G., Granata F., Capodanno D., Ohno Y., Tamburino C. I., Capranzano P., La Manna A., Francaviglia B., Gargiulo G., Tamburino C., Longo, G., Granata, F., Capodanno, D., Ohno, Y., Tamburino, C. I., Capranzano, P., La Manna, A., Francaviglia, B., Gargiulo, G., and Tamburino, C.

Subjects
Male, Registrie, Time Factor, Risk Factor, bioresorbable vascular scaffold, scaffold restenosis, failure, Coronary Artery Disease, Middle Aged, Coronary Angiography, Prosthesis Design, Prosthesis Failure, failure, Equipment Failure Analysi, Percutaneous Coronary Intervention, Treatment Outcome, Italy, Coronary Restenosi, Absorbable Implant, Female, bioresorbable vascular scaffold, scaffold restenosi, Tomography, Optical Coherence, scaffold restenosis, Aged, Human
Abstract

The Absorb bioresorbable vascular scaffold (Absorb BVS, Abbott Vascular, Santa Clara, California) promises to address some of the residual shortcomings of existing metallic stents, such as late events induced by permanent caging of the coronary vessel. Scaffold restenosis (ScR) of BVS has been poorly described so far and treatment strategies for this event remain to be codified. We report on a case series of 14 lesions in 12 patients presenting with ScR and discuss their anatomical features and management strategies.

Published
2015

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