Magnetic resonance in medical sciences : MRMS : an official journal of Japan Society of Magnetic Resonance in Medicine最新文献_第9页

Axillary Lymphadenopathy after COVID-19 Vaccination: Follow-up for Enlarged Lymph Nodes on MR Imaging. 接种 COVID-19 疫苗后的腋窝淋巴结病：磁共振成像中淋巴结肿大的随访。

Magnetic resonance in medical sciences : MRMS : an official journal of Japan Society of Magnetic Resonance in Medicine Pub Date : 2024-02-07 DOI: 10.2463/mrms.mp.2023-0147

Noriko Kanemaru, Takeharu Yoshikawa, Soichiro Miki, Takahiro Nakao, Yuta Nakamura, Kotaro Fujimoto, Osamu Abe

{"title":"Axillary Lymphadenopathy after COVID-19 Vaccination: Follow-up for Enlarged Lymph Nodes on MR Imaging.","authors":"Noriko Kanemaru, Takeharu Yoshikawa, Soichiro Miki, Takahiro Nakao, Yuta Nakamura, Kotaro Fujimoto, Osamu Abe","doi":"10.2463/mrms.mp.2023-0147","DOIUrl":"https://doi.org/10.2463/mrms.mp.2023-0147","url":null,"abstract":"Purpose: The purpose of this study was to investigate the longitudinal MRI characteristic of COVID-19-vaccination-related axillary lymphadenopathy by evaluating the size, T2-weighted signal intensity, and apparent diffusion coefficient (ADC) values.Methods: COVID-19-vaccination-related axillary lymphadenopathy was observed in 90 of 433 health screening program participants on the chest region of whole-body axial MRIs in 2021, as reported in our previous study. Follow-up MRI was performed at an interval of approximately 1 year after the second vaccination dose from 2022 to 2023. The diameter, signal intensity on T2-weighted images, and ADC of the largest enlarged lymph nodes were measured on chest MRI. The values were compared between the post-vaccination MRI and the follow-up MRI, and statistically analyzed.Results: Out of the 90 participants who had enlarged lymph nodes of 5 mm or larger in short axis after the second vaccination dose, 76 participants (45 men and 31 women, mean age: 61 years) were enrolled in the present study. The median short- and long-axis diameter of the enlarged lymph nodes was 7 mm and 9 mm for post-vaccination MRI and 4 mm and 6 mm for follow-up MRI, respectively. The median signal intensity relative to the muscle on T2-weighted images decreased (5.1 for the initial post-vaccination MRI and 3.6 for the follow-up MRI, P < .0001). The ADC values did not show a notable change and remained in a normal range.Conclusion: The enlarged axillary lymph nodes decreased both in size and in signal intensity on T2-weighted images of follow-up MRI. The ADC remained unchanged. Our findings may provide important information to establish evidence-based guidelines for conducting proper assessment and management of post-vaccination lymphadenopathy.","PeriodicalId":94126,"journal":{"name":"Magnetic resonance in medical sciences : MRMS : an official journal of Japan Society of Magnetic Resonance in Medicine","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139704352","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Advanced Techniques for MR Neuroimaging. 核磁共振神经成像高级技术。

Magnetic resonance in medical sciences : MRMS : an official journal of Japan Society of Magnetic Resonance in Medicine Pub Date : 2024-01-01 DOI: 10.2463/mrms.e.2024-1000

Akifumi Hagiwara, Masaya Takahashi

引用次数: 0

Clinical Application of Quantitative MR Imaging in Nonalcoholic Fatty Liver Disease. MR定量成像在非酒精性脂肪肝中的临床应用。

Magnetic resonance in medical sciences : MRMS : an official journal of Japan Society of Magnetic Resonance in Medicine Pub Date : 2023-10-01 Epub Date: 2022-05-18 DOI: 10.2463/mrms.rev.2021-0152

Yushi Tsujita, Keitaro Sofue, Eisuke Ueshima, Yoshiko Ueno, Masatoshi Hori, Takamichi Murakami

{"title":"Clinical Application of Quantitative MR Imaging in Nonalcoholic Fatty Liver Disease.","authors":"Yushi Tsujita, Keitaro Sofue, Eisuke Ueshima, Yoshiko Ueno, Masatoshi Hori, Takamichi Murakami","doi":"10.2463/mrms.rev.2021-0152","DOIUrl":"10.2463/mrms.rev.2021-0152","url":null,"abstract":"Viral hepatitis was previously the most common cause of chronic liver disease. However, in recent years, nonalcoholic fatty liver disease (NAFLD) cases have been increasing, especially in developed countries. NAFLD is histologically characterized by fat, fibrosis, and inflammation in the liver, eventually leading to cirrhosis and hepatocellular carcinoma. Although biopsy is the gold standard for the assessment of the liver parenchyma, quantitative evaluation methods, such as ultrasound, CT, and MRI, have been reported to have good diagnostic performances. The quantification of liver fat, fibrosis, and inflammation is expected to be clinically useful in terms of the prognosis, early intervention, and treatment response for the management of NAFLD. The aim of this review was to discuss the basics and prospects of MRI-based tissue quantifications of the liver, mainly focusing on proton density fat fraction for the quantification of fat deposition, MR elastography for the quantification of fibrosis, and multifrequency MR elastography for the evaluation of inflammation.","PeriodicalId":94126,"journal":{"name":"Magnetic resonance in medical sciences : MRMS : an official journal of Japan Society of Magnetic Resonance in Medicine","volume":"22 4","pages":"435-445"},"PeriodicalIF":0.0,"publicationDate":"2023-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ftp.ncbi.nlm.nih.gov/pub/pmc/oa_pdf/bc/79/mrms-22-435.PMC10552668.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41148067","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

MRI Findings and Differential Diagnosis of Anterior Mediastinal Solid Tumors. 前纵隔实体瘤的MRI表现与鉴别诊断。

Magnetic resonance in medical sciences : MRMS : an official journal of Japan Society of Magnetic Resonance in Medicine Pub Date : 2023-10-01 Epub Date: 2022-03-17 DOI: 10.2463/mrms.rev.2021-0098

Takahiko Nakazono, Ken Yamaguchi, Ryoko Egashira, Mizuki Iyadomi, Kazuya Fujiki, Sachiho Takayanagi, Masanobu Mizuguchi, Hiroyuki Irie

{"title":"MRI Findings and Differential Diagnosis of Anterior Mediastinal Solid Tumors.","authors":"Takahiko Nakazono, Ken Yamaguchi, Ryoko Egashira, Mizuki Iyadomi, Kazuya Fujiki, Sachiho Takayanagi, Masanobu Mizuguchi, Hiroyuki Irie","doi":"10.2463/mrms.rev.2021-0098","DOIUrl":"https://doi.org/10.2463/mrms.rev.2021-0098","url":null,"abstract":"The anterior mediastinum is the most common location of mediastinal tumors, and thymic epithelial tumors are the most common mediastinal tumors. It is important to differentiate thymic epithelial tumors from malignant lymphomas and malignant germ cell tumors because of the different treatment strategies. Dynamic contrast-enhanced MRI and diffusion-weighted imaging can provide additional information on the differential diagnosis. Chemical shift imaging can detect tiny fat tissues in the lesion and is useful in differentiating thymic hyperplasia from other solid tumors such as thymomas. MRI findings reflect histopathological features of mediastinal tumors, and a comprehensive evaluation of MRI sequences is important for estimation of the histopathological features of the tumor. In this manuscript, we describe the MRI findings of anterior mediastinal solid tumors and the role of MRI in the differential diagnosis.","PeriodicalId":94126,"journal":{"name":"Magnetic resonance in medical sciences : MRMS : an official journal of Japan Society of Magnetic Resonance in Medicine","volume":"22 4","pages":"415-433"},"PeriodicalIF":0.0,"publicationDate":"2023-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ftp.ncbi.nlm.nih.gov/pub/pmc/oa_pdf/f3/5f/mrms-22-415.PMC10552663.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41176075","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

ERRATA: Intracranial Hemorrhage and Tortuosity of Veins Detected on Susceptibility-weighted Imaging of a Child with a Type IV Collagen α1 Mutation and Schizencephaly. 1例IV型胶原α1突变和脑裂畸形患儿的敏感性加权成像检测颅内出血和静脉曲张。

Magnetic resonance in medical sciences : MRMS : an official journal of Japan Society of Magnetic Resonance in Medicine Pub Date : 2015-01-01 DOI: 10.2463/mrms.2014-0060er

引用次数: 3