Výsledky vyhledávání - "Ayame Shimizu"

Effect of Label Redundancy in Crowdsourcing for Training Machine Learning Models

Publikováno v: Journal of Data Intelligence. 3:301-315

Crowdsourcing is widely utilized for collecting labeled examples to train supervised machine learning models, but the labels obtained from workers are considerably noisier than those from expert annotators. To address the noisy label issue, most rese

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::0f113fb846c3fa0a06f532e984530d79
https://doi.org/10.26421/jdi3.3-1

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Respiratory variation of the extrahepatic bile duct: evaluation with deep inspiratory and expiratory MRCP

Autor: Naofumi Matsunaga, Ayame Shimizu, Masahiro Tanabe, Katsuyoshi Ito

Publikováno v: Magnetic Resonance Imaging. 30:579-582

The purpose of the study was to evaluate the respiratory variation of the extrahepatic bile duct in morphology including shape, length and duct diameter on the breath-hold magnetic resonance cholangiopancreatography (MRCP) obtained during deep inspir

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::73cd9e7f6720e35f4b1ef21e3bccb0e2
https://doi.org/10.1016/j.mri.2011.12.024

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Nondiffuse fatty infiltration of the liver: Does the uptake of iron-oxide increase or decrease at SPIO-enhanced MR imaging?

Autor: Naofumi Matsunaga, Masahiro Tanabe, Ayame Shimizu, Hideko Onoda, Katsuyoshi Ito

Publikováno v: European Journal of Radiology. 79:e113-e116

To clarify whether the uptake of SPIO increases or decreases in areas of fatty change compared with surrounding areas of nonfatty change at SPIO-enhanced MR imaging.Approval for this retrospective study was obtained from our institutional review boar

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4ad722b73d9130b44a38c2b5187ab078
https://doi.org/10.1016/j.ejrad.2011.04.004

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Hepatocellular lesions with increased iron uptake on superparamagnetic iron oxide-enhanced magnetic resonance imaging in cirrhosis or chronic hepatitis: comparison of four magnetic resonance sequences for lesion conspicuity

Autor: Katsuyoshi Ito, Masahiro Tanabe, Takeshi Fujita, Naofumi Matsunaga, Ayame Shimizu, Hideko Onoda, Yasuo Washida, Shigenari Yamatogi

Publikováno v: Magnetic Resonance Imaging. 27:801-806

The aim of this study was to determine the adequate MR sequence for the lesion conspicuity of hepatocellular lesions with increased iron uptake on superparamagnetic iron oxide (SPIO)-enhanced MRI.SPIO-enhanced MRI was performed using a 1.5-T system.

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b52a731a26adc4ee24eda687d2379072
https://doi.org/10.1016/j.mri.2008.11.006

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Portal Venous System: Evaluation with Unenhanced MR Angiography with a Single-Breath-Hold ECG-Synchronized 3D Half-Fourier Fast Spin-Echo Sequence

Autor: Chisaki Jo, Naofumi Matsunaga, Masahiro Tanabe, Shinji Koike, Mitsue Miyazaki, Katsuyoshi Ito, Ayame Shimizu

Publikováno v: American Journal of Roentgenology. 191:550-554

OBJECTIVE. Eighteen healthy persons underwent unenhanced MR angiography with a breath-hold ECG-synchronized 3D half-Fourier fast spin-echo technique to evaluate the visibility of the portal vein and its branches.CONCLUSION. Our results indicated that

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6d9f329749b58dddff7e3ee959890a08
https://doi.org/10.2214/ajr.07.2697

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Small hepatocellular carcinomas in cirrhosis: differences in contrast enhancement effects between helical CT and MR imaging during multiphasic dynamic imaging

Autor: Katsuyoshi Ito, Katsumi Sasaki, Ayame Shimizu, Masahiro Tanabe, Minoru Hayashida, Naofumi Matsunaga, Takeshi Fujita

Publikováno v: Magnetic Resonance Imaging. 26:65-71

The purpose of this study was to evaluate differences in the degrees of contrast enhancement effects of small hepatocellular carcinomas (HCCs) in patients with cirrhosis between helical computed tomography (CT) and magnetic resonance (MR) imaging dur

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https://doi.org/10.1016/j.mri.2007.04.007

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Small hyperintense hepatic lesions on T1-weighted images in patients with cirrhosis: evaluation with serial MRI and imaging features for clinical benignity

Autor: Naofumi Matsunaga, Masahiro Tanabe, Katsuyoshi Ito, Minoru Hayashida, Kensaku Shimizu, Katsumi Sasaki, Ayame Shimizu

Publikováno v: Magnetic Resonance Imaging. 25:1430-1436

The aim of this study was to evaluate the frequency and magnetic resonance imaging (MRI) features of clinically benign, small (2 cm) hyperintense hepatic lesions in the cirrhotic liver on T1-weighted MR images seen at serial MRI.This study included 1

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::abf6eaf349d93e8c0f8cc276a5bfc83b
https://doi.org/10.1016/j.mri.2007.03.029

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Small hepatic lesions found on single-phase helical CT in patients with malignancy: Diagnostic capability of breath-hold, multisection fluid-attenuated inversion-recovery (FLAIR) MR imaging using a half-fourier acquisition single-shot turbo spin-echo (HASTE) sequence

Autor: Minoru Hayashida, Masayasu Yasui, Naofumi Matsunaga, Ayame Shimizu, Masahiro Tanabe, Takeshi Fujita, Katsuyoshi Ito, Katsumi Sasaki

Publikováno v: Journal of Magnetic Resonance Imaging. 25:129-136

Purpose To evaluate the diagnostic capability of breath-hold, multisection fluid-attenuated inversion-recovery (FLAIR) imaging using a half-Fourier acquisition single-shot turbo spin-echo (HASTE) sequence in combination with T2-weighted fast spin-ech

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f77ee03fd73925183e002188c5811e7f
https://doi.org/10.1002/jmri.20797

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Multiarterial Phase Dynamic MRI of Small Early Enhancing Hepatic Lesions in Cirrhosis or Chronic Hepatitis: Differentiating Between Hypervascular Hepatocellular Carcinomas and Pseudolesions

Autor: Ayame Shimizu, Shigeru Hibino, Masanao Yuhara, Katsuyoshi Ito, Takeshi Fujita, Naofumi Matsunaga, Katsumi Sasaki, Shinji Koike

Publikováno v: American Journal of Roentgenology. 183:699-705

The purpose of this study was to assess the value of multiarterial phase contrast-enhanced dynamic MRI of the whole liver obtained during a single breath-hold for small early enhancing hepatic lesions in patients with cirrhosis or chronic hepatitis,

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3e8b3a2b966015d7bbe63e78efc083b9
https://doi.org/10.2214/ajr.183.3.1830699

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