Pub Date : 2022-01-01DOI: 10.13104/imri.2022.26.1.48
Jae Sung Cho, Kyung Ryeol Lee, B. Kim, G. Choi, J. Lee, J. Huh, B. Jang
{"title":"Multifocal Extranodal Involvement in Diffuse Large B-cell Lymphoma (DLBCL): Bone, Soft Tissue, Testis, and Kidney","authors":"Jae Sung Cho, Kyung Ryeol Lee, B. Kim, G. Choi, J. Lee, J. Huh, B. Jang","doi":"10.13104/imri.2022.26.1.48","DOIUrl":"https://doi.org/10.13104/imri.2022.26.1.48","url":null,"abstract":"","PeriodicalId":73505,"journal":{"name":"Investigative magnetic resonance imaging","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66637240","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}
Pub Date : 2022-01-01DOI: 10.13104/imri.2022.26.1.55
Winnah Wu-In Lea, Suk-Joo Hong, W. Kang, E. Kang, Tae-Sung Jeon
{"title":"Subcutaneous Sarcoidosis of the Distal Lower Leg in a Middle-Aged Woman Associated with Pulmonary Sarcoidosis: a Case Report","authors":"Winnah Wu-In Lea, Suk-Joo Hong, W. Kang, E. Kang, Tae-Sung Jeon","doi":"10.13104/imri.2022.26.1.55","DOIUrl":"https://doi.org/10.13104/imri.2022.26.1.55","url":null,"abstract":"","PeriodicalId":73505,"journal":{"name":"Investigative magnetic resonance imaging","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66637323","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}
Pub Date : 2022-01-01DOI: 10.13104/imri.2022.26.4.191
Ara Cho, L. Do, Seul Kee Kim, W. Yoon, B. H. Baek, I. Park
{"title":"Application of Machine Learning and Deep Learning in Imaging of Ischemic Stroke","authors":"Ara Cho, L. Do, Seul Kee Kim, W. Yoon, B. H. Baek, I. Park","doi":"10.13104/imri.2022.26.4.191","DOIUrl":"https://doi.org/10.13104/imri.2022.26.4.191","url":null,"abstract":"","PeriodicalId":73505,"journal":{"name":"Investigative magnetic resonance imaging","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66638267","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}
Pub Date : 2021-09-01DOI: 10.13104/imri.2021.25.3.193
J. Noh, Hyunkoo Kang
{"title":"Congenital Absence of the Bilateral Internal Carotid Arteries: a Case Report","authors":"J. Noh, Hyunkoo Kang","doi":"10.13104/imri.2021.25.3.193","DOIUrl":"https://doi.org/10.13104/imri.2021.25.3.193","url":null,"abstract":"","PeriodicalId":73505,"journal":{"name":"Investigative magnetic resonance imaging","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45777554","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}
Pub Date : 2021-09-01DOI: 10.13104/imri.2021.25.3.164
Chiheon Kwon, Koung Mi Kang, M. Byun, D. Yi, Huijin Song, Ji Ye Lee, I. Hwang, R. Yoo, T. Yun, S. Choi, J. H. Kim, C. Sohn, D. Y. Lee
{"title":"Assessment of Mild Cognitive Impairment in Elderly Subjects Using a Fully Automated Brain Segmentation Software","authors":"Chiheon Kwon, Koung Mi Kang, M. Byun, D. Yi, Huijin Song, Ji Ye Lee, I. Hwang, R. Yoo, T. Yun, S. Choi, J. H. Kim, C. Sohn, D. Y. Lee","doi":"10.13104/imri.2021.25.3.164","DOIUrl":"https://doi.org/10.13104/imri.2021.25.3.164","url":null,"abstract":"","PeriodicalId":73505,"journal":{"name":"Investigative magnetic resonance imaging","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42276945","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}
Pub Date : 2021-09-01DOI: 10.13104/imri.2021.25.3.183
Ju Yeon Lee, Ha Youn Kim, I. Yu, S. Kim, H. Son
Tumors that metastasize to the pituitary gland are unusual and metastasis of neuroendocrine neoplasm to the sellar region is extremely rare. We report a 59-year-old man with pituitary metastasis from pulmonary carcinoid tumor who presented with left progressive deterioration of visual field. Sellar dynamic magnetic resonance imaging revealed an enhancing sellar mass invading the left cavernous sinus. We report this unusual case with a review of the relevant literature.
{"title":"Pituitary Metastasis of Bronchial Carcinoid Tumor Mimicking Pituitary Adenoma: a Case Report","authors":"Ju Yeon Lee, Ha Youn Kim, I. Yu, S. Kim, H. Son","doi":"10.13104/imri.2021.25.3.183","DOIUrl":"https://doi.org/10.13104/imri.2021.25.3.183","url":null,"abstract":"Tumors that metastasize to the pituitary gland are unusual and metastasis of neuroendocrine neoplasm to the sellar region is extremely rare. We report a 59-year-old man with pituitary metastasis from pulmonary carcinoid tumor who presented with left progressive deterioration of visual field. Sellar dynamic magnetic resonance imaging revealed an enhancing sellar mass invading the left cavernous sinus. We report this unusual case with a review of the relevant literature.","PeriodicalId":73505,"journal":{"name":"Investigative magnetic resonance imaging","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48800783","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}
Pub Date : 2021-09-01DOI: 10.13104/imri.2021.25.3.172
Hee-Soo Kim, Joon-Il Choi, Bohyun Kim, Seo Yeon Youn, Hokun Kim, Dong Hwan Kim, S. Rha
Purpose: We evaluated the diagnostic performance of LI-RADS version 2018 using gadoxetic acid enhanced MRI for recurrent but untreated HCC in patients with prior history of HCC. Materials and Methods: We enrolled 50 consecutive patients who 1) prior history of treatment of HCC, 2) underwent liver surgery for radiological/clinical diagnosis of new HCC between 2013 to 2018, 3) had gadoxetic acid enhanced MRI within one month before surgery, and 4) did not have more than five HCCs or infiltrative tumors only. Two radiologists reviewed MRI and determined the presence of LR3, LR4 and LR5 observations except previously treated tumors based on LI-RADS version 2018 in consensus. We sub-classified LR4 into LR4m (LR4 with major features only) and LR4u (LR4 upgraded from LR3 by ancillary features). LR4u were further sub-classified into LR4ua (with arterial phase hyperenhancement) and LR4un (without arterial phase hyperenhancement). Results: PPV for LR5, LR4 and LR3 observations for recurrent HCC were 100%, 61.5% and 25.0%, respectively. 100% (3/3) of LR4m were HCC. However, PPV of LR4u was 56.5%. PPV of LR4ua and LR4un were 73.3% and 25.0%, respectively. Sensitivity of LR5 and LR5+LR4 observations as a diagnostic threshold were 32.1% and 89.3%, respectively. Sensitivity for LR5+LR4m+LR4ua observations for diagnosis of HCC were 83.7% and significantly superior to that of LR5 without significant deterioration of specificity (75.0%). Conclusion: In patients with prior history of HCC, LR4 observations by major features or with APHE may be regarded as recurrent HCCs given high sensitivity and comparable specificity/PPV to LR5 observations.
{"title":"LI-RADS version 2018 in Patients with Prior History of Hepatocellular Carcinoma: Are LR4 Observations Enough for the Diagnosis of Recurrent HCC?","authors":"Hee-Soo Kim, Joon-Il Choi, Bohyun Kim, Seo Yeon Youn, Hokun Kim, Dong Hwan Kim, S. Rha","doi":"10.13104/imri.2021.25.3.172","DOIUrl":"https://doi.org/10.13104/imri.2021.25.3.172","url":null,"abstract":"Purpose: We evaluated the diagnostic performance of LI-RADS version 2018 using gadoxetic acid enhanced MRI for recurrent but untreated HCC in patients with prior history of HCC. Materials and Methods: We enrolled 50 consecutive patients who 1) prior history of treatment of HCC, 2) underwent liver surgery for radiological/clinical diagnosis of new HCC between 2013 to 2018, 3) had gadoxetic acid enhanced MRI within one month before surgery, and 4) did not have more than five HCCs or infiltrative tumors only. Two radiologists reviewed MRI and determined the presence of LR3, LR4 and LR5 observations except previously treated tumors based on LI-RADS version 2018 in consensus. We sub-classified LR4 into LR4m (LR4 with major features only) and LR4u (LR4 upgraded from LR3 by ancillary features). LR4u were further sub-classified into LR4ua (with arterial phase hyperenhancement) and LR4un (without arterial phase hyperenhancement). Results: PPV for LR5, LR4 and LR3 observations for recurrent HCC were 100%, 61.5% and 25.0%, respectively. 100% (3/3) of LR4m were HCC. However, PPV of LR4u was 56.5%. PPV of LR4ua and LR4un were 73.3% and 25.0%, respectively. Sensitivity of LR5 and LR5+LR4 observations as a diagnostic threshold were 32.1% and 89.3%, respectively. Sensitivity for LR5+LR4m+LR4ua observations for diagnosis of HCC were 83.7% and significantly superior to that of LR5 without significant deterioration of specificity (75.0%). Conclusion: In patients with prior history of HCC, LR4 observations by major features or with APHE may be regarded as recurrent HCCs given high sensitivity and comparable specificity/PPV to LR5 observations.","PeriodicalId":73505,"journal":{"name":"Investigative magnetic resonance imaging","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44794227","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}
Pub Date : 2021-09-01DOI: 10.13104/imri.2021.25.3.156
Junghwa Kang, Hyeonha Kim, Eun-Jin Kim, Eunbi Kim, Hyebin Lee, N. Shin, Yoonho Nam
{"title":"Convolutional Neural Network-Based Automatic Segmentation of Substantia Nigra on Nigrosome and Neuromelanin Sensitive MR Images","authors":"Junghwa Kang, Hyeonha Kim, Eun-Jin Kim, Eunbi Kim, Hyebin Lee, N. Shin, Yoonho Nam","doi":"10.13104/imri.2021.25.3.156","DOIUrl":"https://doi.org/10.13104/imri.2021.25.3.156","url":null,"abstract":"","PeriodicalId":73505,"journal":{"name":"Investigative magnetic resonance imaging","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43235204","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}
Pub Date : 2021-09-01DOI: 10.13104/imri.2021.25.3.197
M. Kang, Da Mi Kim, In Ho Lee, Chang June Song
{"title":"Early Diagnosis of Aseptic Meningitis in Ramsay Hunt Syndrome on 10-Minute Delayed CE 3D FLAIR Image: a Case Report","authors":"M. Kang, Da Mi Kim, In Ho Lee, Chang June Song","doi":"10.13104/imri.2021.25.3.197","DOIUrl":"https://doi.org/10.13104/imri.2021.25.3.197","url":null,"abstract":"","PeriodicalId":73505,"journal":{"name":"Investigative magnetic resonance imaging","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48225528","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}
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