Pub Date : 2022-01-01DOI: 10.13104/imri.2022.26.1.10
Elena Pak, S. Choi, Chul-Kee Park, Tae Min Kim, Sung-Hye Park, J. Won, J. Lee, S. Lee, I. Hwang, R. Yoo, Koung Mi Kang, T. Yun
{"title":"Added Value of Contrast Leakage Information over the CBV Value of DSC Perfusion MRI to Differentiate between Pseudoprogression and True Progression after Concurrent Chemoradiotherapy in Glioblastoma Patients","authors":"Elena Pak, S. Choi, Chul-Kee Park, Tae Min Kim, Sung-Hye Park, J. Won, J. Lee, S. Lee, I. Hwang, R. Yoo, Koung Mi Kang, T. Yun","doi":"10.13104/imri.2022.26.1.10","DOIUrl":"https://doi.org/10.13104/imri.2022.26.1.10","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":"66636824","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.2022.26.1.20
K. Jin, Min Hee Lee, Min A. Yoon, Hwahwi Kim, Wanlim Kim, Choong Guen Chee, H. Chung, Sang Hoon Lee, M. Shin
Purpose: To assess conventional MRI features associated with residual soft-tissue sarcomas following unplanned excision (UPE), and to compare the diagnostic performance of conventional MRI only with that of MRI including diffusion-weighted imaging (DWI) for residual tumors after UPE. Materials and Methods: We included 103 consecutive patients who had received UPE of a soft-tissue sarcoma with wide excision of the tumor bed between December 2013 and December 2019 and who also underwent conventional MRI and DWI in this retrospective study. The presence of focal enhancement, soft-tissue edema, fascial enhancement, fluid collections, and hematoma on MRI including DWI was reviewed by two musculoskeletal radiologists. We used classification and regression tree (CART) analysis to identify the most significant MRI features. We compared the diagnostic performances of conventional MRI and added DWI using the McNemar test. Results: Residual tumors were present in 69 (66.9%) of 103 patients, whereas no tumors were found in 34 (33.1%) patients. CART showed focal enhancement to be the most significant predictor of residual tumors and correctly predicted residual tumors in 81.6% (84/103) and 78.6% (81/103) of patients for Reader 1 and Reader 2, respectively. Compared with conventional MRI only, the addition of DWI for Reader 1 improved specificity (32.8% vs. 56%, 33.3% vs. 63.0%, P < 0.05), decreased sensitivity (96.8% vs. 84.1%, 98.7% vs. 76.7%, P < 0.05), without a difference in diagnostic accuracy (76.7% vs. 74.8%, 72.9% vs. 71.4%) in total and in subgroups. For Reader 2, diagnostic performance was not significantly different between the sets of MRI (P > 0.05). Conclusion: After UPE of a soft-tissue sarcoma, the presence or absence of a focal enhancement was the most significant MRI finding predicting residual tumors. MRI provided good diagnostic accuracy for detecting residual tumors, and the addition of DWI to conventional MRI may increase specificity.
目的:评估非计划切除(UPE)后残留软组织肉瘤的常规MRI特征，并比较常规MRI与MRI(包括弥散加权成像(DWI))对UPE后残留肿瘤的诊断效果。材料和方法:在这项回顾性研究中，我们纳入了2013年12月至2019年12月期间连续103例接受UPE并广泛切除肿瘤床的软组织肉瘤患者，并接受了常规MRI和DWI检查。两名肌肉骨骼放射科医师回顾了MRI(包括DWI)上灶性增强、软组织水肿、筋膜增强、积液和血肿的表现。我们使用分类和回归树(CART)分析来识别最重要的MRI特征。我们比较了常规MRI和添加DWI的McNemar测试的诊断性能。结果:103例患者中69例(66.9%)存在肿瘤残留，34例(33.1%)未发现肿瘤。CART显示局灶增强是残余肿瘤最显著的预测因子，在Reader 1和Reader 2中分别有81.6%(84/103)和78.6%(81/103)的患者正确预测残余肿瘤。与单纯常规MRI相比，Reader 1的DWI增加提高了特异性(32.8% vs. 56%， 33.3% vs. 63.0%， P < 0.05)，降低了敏感性(96.8% vs. 84.1%， 98.7% vs. 76.7%， P < 0.05)，总体和亚组的诊断准确率无差异(76.7% vs. 74.8%， 72.9% vs. 71.4%)。对于Reader 2，两组MRI的诊断性能差异无统计学意义(P < 0.05)。结论:软组织肉瘤UPE后，灶性增强的存在与否是预测肿瘤残留的最重要的MRI发现。MRI对残余肿瘤的检测具有良好的诊断准确性，在常规MRI的基础上增加DWI可能会增加特异性。
{"title":"Diagnosis of Residual Tumors after Unplanned Excision of Soft-Tissue Sarcomas: Conventional MRI Features and Added Value of Diffusion-Weighted Imaging","authors":"K. Jin, Min Hee Lee, Min A. Yoon, Hwahwi Kim, Wanlim Kim, Choong Guen Chee, H. Chung, Sang Hoon Lee, M. Shin","doi":"10.13104/imri.2022.26.1.20","DOIUrl":"https://doi.org/10.13104/imri.2022.26.1.20","url":null,"abstract":"Purpose: To assess conventional MRI features associated with residual soft-tissue sarcomas following unplanned excision (UPE), and to compare the diagnostic performance of conventional MRI only with that of MRI including diffusion-weighted imaging (DWI) for residual tumors after UPE. Materials and Methods: We included 103 consecutive patients who had received UPE of a soft-tissue sarcoma with wide excision of the tumor bed between December 2013 and December 2019 and who also underwent conventional MRI and DWI in this retrospective study. The presence of focal enhancement, soft-tissue edema, fascial enhancement, fluid collections, and hematoma on MRI including DWI was reviewed by two musculoskeletal radiologists. We used classification and regression tree (CART) analysis to identify the most significant MRI features. We compared the diagnostic performances of conventional MRI and added DWI using the McNemar test. Results: Residual tumors were present in 69 (66.9%) of 103 patients, whereas no tumors were found in 34 (33.1%) patients. CART showed focal enhancement to be the most significant predictor of residual tumors and correctly predicted residual tumors in 81.6% (84/103) and 78.6% (81/103) of patients for Reader 1 and Reader 2, respectively. Compared with conventional MRI only, the addition of DWI for Reader 1 improved specificity (32.8% vs. 56%, 33.3% vs. 63.0%, P < 0.05), decreased sensitivity (96.8% vs. 84.1%, 98.7% vs. 76.7%, P < 0.05), without a difference in diagnostic accuracy (76.7% vs. 74.8%, 72.9% vs. 71.4%) in total and in subgroups. For Reader 2, diagnostic performance was not significantly different between the sets of MRI (P > 0.05). Conclusion: After UPE of a soft-tissue sarcoma, the presence or absence of a focal enhancement was the most significant MRI finding predicting residual tumors. MRI provided good diagnostic accuracy for detecting residual tumors, and the addition of DWI to conventional MRI may increase specificity.","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":"66636948","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.2022.26.1.76
Seonjung Jang, J. Lee
{"title":"Unilateral Chronic Organizing Hematoma after Breast Explantation Mimicking Chest Wall Tumor: a Case Report with Imaging Features","authors":"Seonjung Jang, J. Lee","doi":"10.13104/imri.2022.26.1.76","DOIUrl":"https://doi.org/10.13104/imri.2022.26.1.76","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":"66637598","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.2022.26.2.117
N. Tawara
{"title":"The Ability of Muscle Functional MRI to Detect the Slight Effect of Exercise on Trunk Muscle Activity","authors":"N. Tawara","doi":"10.13104/imri.2022.26.2.117","DOIUrl":"https://doi.org/10.13104/imri.2022.26.2.117","url":null,"abstract":"","PeriodicalId":73505,"journal":{"name":"Investigative magnetic resonance imaging","volume":"176 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66637715","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.2022.26.3.151
Sang-Un Kim, Soojung Park, Hyungjoon Cho, Yongwon Cho, Yu-Whan Oh, Yun Gi Kim, J. Shim, Jong-il Choi, Young-Hoon Kim, M. Paek, Sung Ho Hwang
{"title":"Left Ventricular Remodeling After Catheter Ablation of Atrial Fibrillation: Changes of Myocardial Extracellular Volume Fraction by Cardiac MRI","authors":"Sang-Un Kim, Soojung Park, Hyungjoon Cho, Yongwon Cho, Yu-Whan Oh, Yun Gi Kim, J. Shim, Jong-il Choi, Young-Hoon Kim, M. Paek, Sung Ho Hwang","doi":"10.13104/imri.2022.26.3.151","DOIUrl":"https://doi.org/10.13104/imri.2022.26.3.151","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":"66637821","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}
{"title":"Diffusion MRI With High to Ultrahigh b-Values: How It Will Benefit the Discovery of Brain Microstructure and Pathological Changes","authors":"Paween Wongkornchaovalit, Mingren Feng, Hongjian He, Jianhui Zhong","doi":"10.13104/imri.2022.26.4.200","DOIUrl":"https://doi.org/10.13104/imri.2022.26.4.200","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":"66637854","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.2022.26.4.237
S. Jeong, C. Suh, Hwon Heo, Woo Hyun Shim, Sang Joon Kim
{"title":"Current Updates and Unmet Needs of Brain MRI-Based Artificial Intelligence Software for Patients With Neurodegenerative Diseases in the Republic of Korea","authors":"S. Jeong, C. Suh, Hwon Heo, Woo Hyun Shim, Sang Joon Kim","doi":"10.13104/imri.2022.26.4.237","DOIUrl":"https://doi.org/10.13104/imri.2022.26.4.237","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":"66638064","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.2022.26.1.43
C. Jung, You Me Kim, Hee-Jeong Kim
{"title":"Recurrent Encapsulated Papillary Carcinoma in the Ipsilateral Internal Mammary Lymph Node: a Case Report","authors":"C. Jung, You Me Kim, Hee-Jeong Kim","doi":"10.13104/imri.2022.26.1.43","DOIUrl":"https://doi.org/10.13104/imri.2022.26.1.43","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":"66637155","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.2022.26.2.96
Ji-ung Yang, Y. Chang, Taekwan Lee
{"title":"Manganese-Enhanced MRI Reveals Brain Circuits Associated with Olfactory Fear Conditioning by Nasal Delivery of Manganese","authors":"Ji-ung Yang, Y. Chang, Taekwan Lee","doi":"10.13104/imri.2022.26.2.96","DOIUrl":"https://doi.org/10.13104/imri.2022.26.2.96","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":"66637420","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.2022.26.1.66
JI-JIANG An, K. Kim
{"title":"Paratesticular Liposarcoma with Atypical Image Findings: a Case Report","authors":"JI-JIANG An, K. Kim","doi":"10.13104/imri.2022.26.1.66","DOIUrl":"https://doi.org/10.13104/imri.2022.26.1.66","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":"66637484","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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