Tomohiro Arakawa

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In Japan, indigenous acute hepatitis E is not a rare disease, and is mainly caused by hepatitis E virus (HEV) genotypes 3 and 4. Whether there is a difference in clinical features between the two genotypes remains unclear. This study compares the clinical features of patients infected with the two. From January, 1994, to December, 2003, 9 infected with HEV(More)
Anemia is commonly observed as a side effect in a treatment with protease inhibitors combined with peginterferon alpha and ribavirin for hepatitis C virus infection. This study assessed the safety, tolerability, viral kinetics, and selection of variants in telaprevir monotherapy for 24 weeks, and outcomes of the off-study treatment with peginterferon(More)
This paper introduces a system model for simultaneous information and power transfer (SWIPT) over inductively coupled circuits from the standard communication-theoretic perspective. It is shown that the rate-energy (R-E) regions, which characterize the performance of SWIPT, for inductively coupled circuits can be obtained by circuit analysis. To evaluate(More)
AIM We investigated the utility of high-sensitivity hepatitis B surface antigen (HBsAg) assays compared with conventional HBsAg assays. METHODS Using serum samples from 114 hepatitis B virus (HBV) carriers in whom HBsAg seroclearance was confirmed by conventional HBsAg assays (cut-off value, 0.05 IU/mL), the amount of HBsAg was re-examined by(More)
Patients 1 and 2 were treatment-naive women who had genotype 1b chronic hepatitis C. Both had IL-28B genotype TT, and amino acid substitutions of core 70 and 91 were both wild type. Search for the presence of resistance-associated variants (RAV) in non-structural (NS)3 and NS5A regions confirmed wild-type D168 and L31, along with Y93H, in both patients.(More)
Low data-rate communication is an effective approach for Internet of things (IoT) devices such as measurement nodes of wireless sensor networks which are required to operate at very low power. While a method which enables the receivers to perform the accurate carrier recovery for low-CNR and low-data-rate communication was proposed, the major difficulty has(More)
A 69-year-old man with liver cirrhosis was admitted to our hospital with general fatigue. Colonoscopy revealed risky red color sign-positive enlarged tortuous rectal varices. Endoscopic injection sclerotherapy (EIS) was performed three times weekly using 5% ethanolamine oleate with iopamidol; the total amount of sclerosant was 7 ml. Images of rectal varices(More)
In 18 of 547 patients who had received nucleoside analogue preparations for 1 year or more, multi-drug resistance was detected, after a median follow-up of 53 months. No patient showed liver failure related to multi-drug resistance acquisition. Multi-drug resistance was associated with entecavir (ETV) therapy in 7 lamivudine (LAM) -resistant patients,(More)
A spread spectrum technology is known to be able to expand the distance of wireless communications by improving the processing gain. However, the effective processing gain is decreased due to the phase shift between the two transceivers. We have studied the compensation algorithm of this phase shift, and its performance has been evaluated by a computer(More)