Akihiro Sato

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PURPOSE To preoperatively evaluate anatomic variations of the bronchial arteries by obtaining three-dimensional (3D) simulations with multidetector computed tomography (CT). MATERIALS AND METHODS This study was approved by the institutional review board, and written informed consent was obtained from all participants. Seventy-three consecutive patients(More)
PURPOSE To retrospectively assess the apparent diffusion coefficient (ADC) for prediction of malignancy and prognosis of malignant astrocytic tumors. MATERIALS AND METHODS The institutional review board approved this study and did not require patient informed consent. Findings from 37 consecutive patients (21 men, 16 women; mean age, 43 years) with(More)
OBJECTIVE The purpose of our study was to determine how frequently the right adrenal vein could be unequivocally identified on MDCT and the spectrum of anatomic variations seen in the right adrenal vein. MATERIALS AND METHODS Contrast-enhanced MDCT was performed in 104 patients with thoracoabdominal vascular disease using an 8-MDCT scanner. Both axial and(More)
BACKGROUND/PURPOSE Hilar cholangiocarcinoma is the one of the most difficult carcinomas to diagnose because of the localization of the main tumor at the hepatic hilus, and because of the complex anatomy of the biliary, artery, and portal systems. To perform a curative operation, it is important to evaluate the extent of carcinoma and the resectability.(More)
Associative memory operating in a real environment must perform well in online incremental learning and be robust to noisy data because noisy associative patterns are presented sequentially in a real environment. We propose a novel associative memory that satisfies these requirements. Using the proposed method, new associative pairs that are presented(More)
Accuracy in quantifying arterial occlusive disease requires an understanding of the relevant technical considerations and familiarity with the strengths and weaknesses of various imaging modalities in this setting. The degree of stenosis is evaluated in terms of diameter stenosis, which can be measured on either projection images or cross-sectional images,(More)
OBJECTIVES The angiographic appearance of acute necrotizing pancreatitis (ANP) demonstrates ischemic change with vasospasm in and around the pancreas. We investigated the role of vasospasm in pancreatic ischemia and necrosis in the early phase of human ANP. METHODS The relationship between the angiographic abnormalities and the perfusion status of the(More)
Animal legs are much more complex than necessary for running on horizontal surfaces. Past research shows that, despite their complexity, they act essentially like simple pogo sticks, or the "spring loaded inverted pendulum" (SLIP). In this paper, the possibility of the realization of a SLIP model using a spring in the leg and only one actuator at the hip is(More)
For the first time, achiral cucurbiturils (CBs) were endowed with significant enantiomeric and distereomeric discrimination by incorporating a strong chiral binder. Calorimetric, nuclear magnetic, light-scattering, and mass spectral studies revealed that (S)-2-methylbutylamine (as a strong binder) can be discriminated by two enantiomeric supramolecular(More)
Adenosine has anti-inflammatory activity. Adenosine deaminase (EC metabolizes extracellular adenosine, resulting in an exacerbation of inflammation. Consequently, it was hypothesized that adenosine deaminase inhibitors produce anti-inflammatory activity by increasing extracellular adenosine concentration. This group recently developed a(More)