Publications by authors named "Yoshiko Ogata"

F-fluorodeoxyglucose positron-emission tomography/computed tomography (F-FDG-PET/CT) is important in lung cancer diagnosis; false negatives are often caused by ground-glass nodules (GGNs). PET/CT utility in GGN diagnosis is unknown. The associations between GGN CT findings (size, properties), the pathological diagnosis and maximum standardized uptake value (SUV) were explored.

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Acute exacerbation of idiopathic pulmonary fibrosis (AE-IPF) is characterized by severe worsening dyspnea of unknown etiology and high mortality without effective treatment. Recently, direct hemoperfusion with polymyxin B (PMX)-immobilized fiber cartridge (PMX-DHP) has been reported to improve pulmonary oxygenation and survival in patients with AE-IPF although its mechanism of action remains unknown. To gain insights into the pathobiology of AE-IPF through the beneficial effects of PMX-DHP, we analyzed the profile of cytokines adsorbed onto PMX-fibers used in 9 AE-IPF patients.

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The objective of this study was to evaluate the utility of the determination of adenosine deaminase (ADA) level in pleural fluid for the differential diagnosis between tuberculous pleural effusion (TPE) and malignant pleural effusion (MPE) in Japan, a country with intermediate incidence of tuberculosis (TB). We retrospectively reviewed the clinical records of 435 patients with pleural effusion and investigated their pleural ADA levels as determined by an auto analyzer. ROC analysis was also performed.

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Histoplasmosis, caused by Histoplasma capsulatum, is an endemic mycosis in many countries of the world except for Japan. Outbreaks of histoplasmosis among Japanese people are very rare and are mainly imported by travelers. We report an outbreak of histoplasmosis among healthy Japanese people who traveled to a resort area in Southeast Asia.

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Gefitinib ('Iressa, ZD1839) has promising antitumor activity in non-small cell lung cancer (NSCLC). However, patients with advanced NSCLC have few treatment options available if they are refractory to gefitinib. We describe four cases of patients with advanced NSCLC who previously responded to gefitinib and obtained significant tumor regression through retreatment with other cytotoxic agents.

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A 22-year-old man was urgently admitted for pneumothorax. He continued complaining of exertional dyspnea and dry cough after the pneumothorax healed. About three months later, an atypical pulmonary mycobacteriosis by mycobacterium kansasii was identified.

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Diffusion of the magnetization profile in the XX model.

Phys Rev E Stat Nonlin Soft Matter Phys

December 2002

We investigate the magnetization profile in the intermediate time of diffusion by using the C*-algebraic method. We observe a transition from monotone profile to nonmonotone profile. This transition is purely thermal.

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Nonequilibrium properties in the transverse XX chain.

Phys Rev E Stat Nonlin Soft Matter Phys

July 2002

We investigate the nonequilibrium properties of the transverse XX chain. The steady state can be interpreted as the equilibrium state or the ground state of the effective Hamiltonian, which depends on the initial state. We also study the physical properties of the state at various temperatures, in particular, the effects of quantum phase transition.

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The authors measured the temperature of the root surface during root canal preparation using Er:YAG laser irradiation and evaluated the thermal effect on the periodontal region. Twenty extracted human teeth with single roots were divided into two groups of 10. These were irradiated using an Er: YAG laser at 2 Hz and 136 to 184 or 170 to 230 mJ/pulse for 1 min with a water spray.

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