Akihisa Okumura

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BACKGROUND Non-missile traumatic brain injury (nmTBI) without macroscopically detectable lesions often results in cognitive impairments that negatively affect daily life. AIM To identify abnormal white matter projections in patients with nmTBI with cognitive impairments using diffusion tensor magnetic resonance imaging (DTI). METHODS DTI scans of(More)
PURPOSE To evaluate testicular enhancement patterns in various scrotal disorders at dynamic contrast medium-enhanced subtraction magnetic resonance (MR) imaging. MATERIALS AND METHODS Forty-two patients with scrotal symptoms (22 testicular diseases, 20 extratesticular scrotal disorders) underwent three-dimensional (3D) fast field-echo or fast spin-echo(More)
Quantitative analyses of cross-sectional areas of the thalami, caudate nuclei, and lentiform nuclei were performed in 29 preterm infants (16 males, 13 females; mean age 29.6 weeks, age range 27 to 24 weeks,) with periventricular leukomalacia (PVL). MRI was carried out in the infants between 9 and 18 months of corrected age and in 16 control infants.(More)
OBJECTIVE To examine (11)C-methyl methionine (MET) accumulation on positron emission tomographic (PET) imaging of glioblastoma multiforme to determine the distribution of metabolic abnormality compared with magnetic resonance imaging (MRI). METHODS Contemporaneous MRI was superimposed on corresponding MET-PET images in 10 patients with newly diagnosed(More)
A research committee supported by the Japanese government conducted a nationwide survey on the epidemiology of acute encephalopathy in Japan using a questionnaire. A total of 983 cases reportedly had acute encephalopathy during the past 3 years, 2007-2010. Among the pathogens of the preceding infection, influenza virus was the most common, followed by human(More)
The biological role of the peroxisome proliferator-activated receptors (PPARs) in various diseases, including inflammation and cancer, has been highlighted recently. Although PPARgamma ligands have been found to inhibit mammary carcinogenesis in rodents, the effects on colon tumorigenesis are controversial. In the present study, three different experiments(More)
Photosystem II (PSII) contains different extrinsic proteins required for oxygen evolution among different organisms. Cyanobacterial PSII contains the 33 kDa, 12 kDa proteins and cytochrome (cyt) c-550; red algal PSII contains a 20 kDa protein in addition to the three homologous cyanobacterial proteins; whereas higher plant PSII contains the 33 kDa, 23 kDa(More)
The aim of this study is to reveal the detailed clinical features of benign convulsions with mild gastroenteritis (CwG). We studied 114 consecutive episodes in 105 patients with CwG between January 1995 and March 2000. CwG was defined as when a patient met the following two conditions: (a) seizures accompanied the symptoms of gastroenteritis without(More)
AIMS To clarify the features of the background electroencephalographic (EEG) activities in clinically well preterm infants born at less than 27 weeks gestation and to outline their chronological changes with increasing postconceptional age (PCA). METHODS EEGs of clinically well premature infants born at less than 27 weeks gestation were recorded during(More)