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  1. Article ; Online: Interpretation of Rectal MRI after Neoadjuvant Treatment in Patients with Rectal Cancer

    Nieun Seo / Joon Seok Lim

    Journal of the Korean Society of Radiology, Vol 84, Iss 3, Pp 550-

    2023  Volume 564

    Abstract: MRI is currently the imaging modality of choice to evaluate rectal cancer after neoadjuvant treatment. The purposes of restaging MRI are to assess the resectability of rectal cancer and to decide whether organ preservation strategies can be applied in ... ...

    Abstract MRI is currently the imaging modality of choice to evaluate rectal cancer after neoadjuvant treatment. The purposes of restaging MRI are to assess the resectability of rectal cancer and to decide whether organ preservation strategies can be applied in patients with a complete clinical response. This review article indicates the key MRI features needed to evaluate rectal cancer after neoadjuvant treatment using a systematic approach. Assessment of primary tumor response including MRI findings to predict a complete response is discussed. Additionally, MRI evaluation of the relationship between the primary tumor and adjacent structures, lymph node response, extramural venous invasion, and tumor deposits after neoadjuvant treatment is presented. Knowledge of these imaging features and their clinical relevance may help radiologists provide an accurate and clinically valuable interpretation of restaging rectal MRI.
    Keywords rectal cancer ; neoadjuvant therapy ; magnetic resonance imaging ; Medical physics. Medical radiology. Nuclear medicine ; R895-920
    Subject code 610
    Language English
    Publishing date 2023-05-01T00:00:00Z
    Publisher The Korean Society of Radiology
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  2. Article ; Online: 수술 전 선행보조치료를 받은 직장암 환자의 직장 자기공명영상의 해석.

    Seo, Nieun / Lim, Joon Seok

    Journal of the Korean Society of Radiology

    2023  Volume 84, Issue 3, Page(s) 550–564

    Abstract: MRI is currently the imaging modality of choice to evaluate rectal cancer after neoadjuvant treatment. The purposes of restaging MRI are to assess the resectability of rectal cancer and to decide whether organ preservation strategies can be applied in ... ...

    Title translation Interpretation of Rectal MRI after Neoadjuvant Treatment in Patients with Rectal Cancer.
    Abstract MRI is currently the imaging modality of choice to evaluate rectal cancer after neoadjuvant treatment. The purposes of restaging MRI are to assess the resectability of rectal cancer and to decide whether organ preservation strategies can be applied in patients with a complete clinical response. This review article indicates the key MRI features needed to evaluate rectal cancer after neoadjuvant treatment using a systematic approach. Assessment of primary tumor response including MRI findings to predict a complete response is discussed. Additionally, MRI evaluation of the relationship between the primary tumor and adjacent structures, lymph node response, extramural venous invasion, and tumor deposits after neoadjuvant treatment is presented. Knowledge of these imaging features and their clinical relevance may help radiologists provide an accurate and clinically valuable interpretation of restaging rectal MRI.
    Language Korean
    Publishing date 2023-05-09
    Publishing country Korea (South)
    Document type English Abstract ; Journal Article ; Review
    ISSN 2951-0805
    ISSN (online) 2951-0805
    DOI 10.3348/jksr.2023.0007
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article ; Online: Current Landscape and Future Perspectives of Abbreviated MRI for Hepatocellular Carcinoma Surveillance.

    Park, Hyo Jung / Seo, Nieun / Kim, So Yeon

    Korean journal of radiology

    2022  Volume 23, Issue 6, Page(s) 598–614

    Abstract: While ultrasound (US) is considered an important tool for hepatocellular carcinoma (HCC) surveillance, it has limited sensitivity for detecting early-stage HCC. Abbreviated MRI (AMRI) has recently gained popularity owing to better sensitivity in its ... ...

    Abstract While ultrasound (US) is considered an important tool for hepatocellular carcinoma (HCC) surveillance, it has limited sensitivity for detecting early-stage HCC. Abbreviated MRI (AMRI) has recently gained popularity owing to better sensitivity in its detection of early-stage HCC than US, while also minimizing the time and cost in comparison to complete contrast-enhanced MRI, as AMRI includes only a few essential sequences tailored for detecting HCC. Currently, three AMRI protocols exist, namely gadoxetic acid-enhanced hepatobiliary-phase AMRI, dynamic contrast-enhanced AMRI, and non-enhanced AMRI. In this study, we discussed the rationale and technical details of AMRI techniques for achieving optimal surveillance performance. The strengths, weaknesses, and current issues of each AMRI protocol were also elucidated. Moreover, we scrutinized previously performed AMRI studies regarding clinical and technical factors. Reporting and recall strategies were discussed while considering the differences in AMRI protocols. A risk-stratified approach for the target population should be taken to maximize the benefits of AMRI and the cost-effectiveness should be considered. In the era of multiple HCC surveillance tools, patients need to be fully informed about their choices for better adherence to a surveillance program.
    MeSH term(s) Carcinoma, Hepatocellular/diagnostic imaging ; Contrast Media ; Gadolinium DTPA ; Humans ; Liver Neoplasms/diagnostic imaging ; Magnetic Resonance Imaging/methods ; Retrospective Studies
    Chemical Substances Contrast Media ; Gadolinium DTPA (K2I13DR72L)
    Language English
    Publishing date 2022-04-13
    Publishing country Korea (South)
    Document type Journal Article ; Review
    ZDB-ID 2046981-0
    ISSN 2005-8330 ; 1229-6929
    ISSN (online) 2005-8330
    ISSN 1229-6929
    DOI 10.3348/kjr.2021.0896
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article ; Online: Validation of the simplified magnetic resonance index of activity by using DWI without gadolinium enhancement to evaluate bowel inflammation in Crohn's disease.

    Bae, Heejin / Seo, Nieun / Kang, Eun Ae / Cheon, Jae Hee / Lim, Joon Seok / Kim, Myeong-Jin

    European radiology

    2023  Volume 33, Issue 5, Page(s) 3266–3275

    Abstract: Objectives: To validate the modified simplified magnetic resonance index of activity (sMARIA) score using DWI on non-contrast magnetic resonance enterography (MRE) to evaluate active inflammation in patients with Crohn's disease (CD), compared to the ... ...

    Abstract Objectives: To validate the modified simplified magnetic resonance index of activity (sMARIA) score using DWI on non-contrast magnetic resonance enterography (MRE) to evaluate active inflammation in patients with Crohn's disease (CD), compared to the original sMARIA scoring system, with and without contrast enhancement.
    Methods: This retrospective study included 275 bowel segments from 55 CD patients who underwent ileocolonoscopy and MRE within a 2-week period. Two blinded radiologists evaluated original sMARIA on both conventional MRE (CE-sMARIA) and non-contrast MRE (T2-sMARIA). Modified sMARIA was then evaluated using non-contrast MRE, replacing ulcerations with DWI grades. Three scoring systems were compared for diagnostic accuracy of active inflammation, correlation with simple endoscopic score (SES)-CD, and interobserver reproducibility.
    Results: The AUC of modified sMARIA for detecting active inflammation (0.863, 95% confidence interval [0.803-0.923]) was significantly higher than T2-sMARIA (0.827 [0.773-0.881], p = 0.017), and comparable to CE-sMARIA (0.908 [0.857-0.959], p = 0.122). CE-sMARIA, T2-sMARIA, and modified sMARIA all showed moderate correlation with SES-CD (r = 0.795, 0.722, and 0.777, respectively). Interobserver reproducibility of diffusion restriction (κ, 0.686 [0.602-0.770]) was significantly better than ulcers on conventional MRE (κ, 0.382 [0.212-0.552]; p = 0.001) and T2-weighted image (κ, 0.312 [0.034-0.590]; p = 0.012).
    Conclusions: Modified sMARIA using DWI can improve the diagnostic performance of sMARIA on non-contrast MRE, showing comparable performance to sMARIA using contrast-enhanced MRE.
    Key points: • DWI can improve the diagnostic performance of non-contrast magnetic resonance enterography (MRE) for assessing active inflammation in patients with Crohn's disease. • Modified simplified magnetic resonance index of activity (sMARIA) using DWI grades in place of ulcers showed comparable diagnostic performance to sMARIA using conventional MRE with contrast-enhanced sequences.
    MeSH term(s) Humans ; Crohn Disease/pathology ; Contrast Media/pharmacology ; Gadolinium/pharmacology ; Retrospective Studies ; Reproducibility of Results ; Ulcer ; Diffusion Magnetic Resonance Imaging/methods ; Magnetic Resonance Imaging/methods ; Inflammation ; Magnetic Resonance Spectroscopy
    Chemical Substances Contrast Media ; Gadolinium (AU0V1LM3JT)
    Language English
    Publishing date 2023-03-11
    Publishing country Germany
    Document type Journal Article
    ZDB-ID 1085366-2
    ISSN 1432-1084 ; 0938-7994 ; 1613-3749
    ISSN (online) 1432-1084
    ISSN 0938-7994 ; 1613-3749
    DOI 10.1007/s00330-023-09501-7
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article ; Online: Validation of the 2012 International Consensus Guidelines Using CT and MRI: Branch Duct and Main Duct Intraductal Papillary Mucinous Neoplasms of the Pancreas.

    Seo, Nieun / Byun, Jae Ho

    Annals of surgery

    2017  Volume 266, Issue 6, Page(s) e51–e52

    Language English
    Publishing date 2017-12
    Publishing country United States
    Document type Journal Article
    ZDB-ID 340-2
    ISSN 1528-1140 ; 0003-4932
    ISSN (online) 1528-1140
    ISSN 0003-4932
    DOI 10.1097/SLA.0000000000001382
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article ; Online: Interpretation of Complete Tumor Response on MRI Following Chemoradiotherapy of Rectal Cancer: Inter-Reader Agreement and Associated Factors in Multi-Center Clinical Practice.

    Kim, Hae Young / Cho, Seung Hyun / Jang, Jong Keon / Kim, Bohyun / Lee, Chul-Min / Lim, Joon Seok / Moon, Sung Kyoung / Oh, Soon Nam / Seo, Nieun / Park, Seong Ho

    Korean journal of radiology

    2024  Volume 25, Issue 4, Page(s) 351–362

    Abstract: Objective: To measure inter-reader agreement and identify associated factors in interpreting complete response (CR) on magnetic resonance imaging (MRI) following chemoradiotherapy (CRT) for rectal cancer.: Materials and methods: This retrospective ... ...

    Abstract Objective: To measure inter-reader agreement and identify associated factors in interpreting complete response (CR) on magnetic resonance imaging (MRI) following chemoradiotherapy (CRT) for rectal cancer.
    Materials and methods: This retrospective study involved 10 readers from seven hospitals with experience of 80-10210 cases, and 149 patients who underwent surgery after CRT for rectal cancer. Using MRI-based tumor regression grading (mrTRG) and methods employed in daily practice, the readers independently assessed mrTRG, CR on T2-weighted images (T2WI) denoted as mrCR
    Results: The mrCR
    Conclusion: Inter-reader agreement was moderate for assessing CR on post-CRT MRI. Readers' varying standards on MRI interpretation (i.e., threshold effect), along with the use of rectal gel, initial tumor size, and initial cT stage, were significant factors associated with inter-reader agreement.
    MeSH term(s) Humans ; Retrospective Studies ; Magnetic Resonance Imaging/methods ; Rectal Neoplasms/diagnostic imaging ; Rectal Neoplasms/therapy ; Rectal Neoplasms/pathology ; Chemoradiotherapy ; Sensitivity and Specificity ; Pathologic Complete Response ; Diffusion Magnetic Resonance Imaging/methods
    Language English
    Publishing date 2024-03-25
    Publishing country Korea (South)
    Document type Journal Article
    ZDB-ID 2046981-0
    ISSN 2005-8330 ; 1229-6929
    ISSN (online) 2005-8330
    ISSN 1229-6929
    DOI 10.3348/kjr.2023.1213
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  7. Article ; Online: Quantitative Analysis of Microperfusion in Contrast-Induced Nephropathy Using Contrast-Enhanced Ultrasound: An Animal Study.

    Seo, Nieun / Oh, Hyewon / Oh, Hyung Jung / Chung, Yong Eun

    Korean journal of radiology

    2021  Volume 22, Issue 5, Page(s) 801–810

    Abstract: Objective: To investigate imaging biomarkers of microperfusion in contrast-induced nephropathy (CIN) using contrast-enhanced ultrasound (CEUS).: Materials and methods: The CIN model was fabricated by administering indomethacin (10 mg/kg), L-NAME (15 ... ...

    Abstract Objective: To investigate imaging biomarkers of microperfusion in contrast-induced nephropathy (CIN) using contrast-enhanced ultrasound (CEUS).
    Materials and methods: The CIN model was fabricated by administering indomethacin (10 mg/kg), L-NAME (15 mg/kg), and iopamidol (10 mL/kg) to Sprague-Dawley rats. After 24 hours, CEUS was performed on CIN (n = 6) and control (n = 6) rats with sulphur hexafluoride microbubbles (SonoVue). From time-intensity curves obtained from the kidney arriving time (AT), acceleration time (AC), time to peak (TTP), and peak enhancement (PE) were measured and compared between the groups. After CEUS, the rats were sacrificed, and cell apoptosis markers were evaluated to confirm the development of CIN.
    Results: Among CEUS parameters, AT (7.8 ± 1.6 vs. 4.2 ± 0.5 s,
    Conclusion: CEUS parameters can be used as imaging biomarkers for microperfusion in CIN. In rats with CIN, AT, AC, and TTP were significantly prolonged, while PE was significantly lower compared to controls.
    MeSH term(s) Acute Kidney Injury/diagnosis ; Acute Kidney Injury/etiology ; Animals ; Disease Models, Animal ; Interleukin-18/genetics ; Interleukin-18/metabolism ; Kidney/metabolism ; Kidney/pathology ; Kidney Function Tests ; Lipocalin-2/genetics ; Lipocalin-2/metabolism ; Male ; Phospholipids/adverse effects ; Proto-Oncogene Proteins c-bcl-2/genetics ; Proto-Oncogene Proteins c-bcl-2/metabolism ; Rats ; Rats, Sprague-Dawley ; Sulfur Hexafluoride/adverse effects ; Ultrasonography ; Up-Regulation ; bcl-2-Associated X Protein/genetics ; bcl-2-Associated X Protein/metabolism
    Chemical Substances Interleukin-18 ; Lipocalin-2 ; Phospholipids ; Proto-Oncogene Proteins c-bcl-2 ; bcl-2-Associated X Protein ; contrast agent BR1 ; Sulfur Hexafluoride (WS7LR3I1D6)
    Language English
    Publishing date 2021-02-02
    Publishing country Korea (South)
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2046981-0
    ISSN 2005-8330 ; 1229-6929
    ISSN (online) 2005-8330
    ISSN 1229-6929
    DOI 10.3348/kjr.2020.0577
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  8. Article ; Online: Preoperative computed tomography assessment of circumferential resection margin in retroperitonealized colon cancer predicts disease-free survival.

    Seo, Nieun / Lim, Joon Seok / Chung, Taek / Lee, Jong Min / Min, Byung Soh / Kim, Myeong-Jin

    European radiology

    2022  Volume 33, Issue 4, Page(s) 2757–2767

    Abstract: Objectives: The aim of this retrospective study was to predict circumferential resection margin (CRM) involvement on preoperative CT, and prognostic impact of CRM assessment by CT (ctCRM) in patients with retroperitonealized colon cancer.: Methods: ... ...

    Abstract Objectives: The aim of this retrospective study was to predict circumferential resection margin (CRM) involvement on preoperative CT, and prognostic impact of CRM assessment by CT (ctCRM) in patients with retroperitonealized colon cancer.
    Methods: This study included patients who underwent resection for ascending or descending colon cancer between July 2010 and February 2013. Positive ctCRM was defined as tumor distance to the retromesenteric plane of ≤ 1 mm. The origin of positive CRM was divided into primary tumor or other tumor components including lymph nodes, tumor deposits, or extramural venous invasions. Logistic regression analysis was performed to identify preoperative factors to predict pathologic CRM (pCRM). A Cox proportional hazards model was used in multivariable analysis to determine the preoperative factors affecting disease-free survival (DFS).
    Results: A total of 274 patients (mean age, 64.0 years ± 11.0 [standard deviation]; 157 men) with retroperitonealized colon cancer were evaluated. Of 274 patients, 67 patients (24.5%) had positive CRM on surgical pathology. The accuracy of preoperative CT in predicting pCRM was 79.6% (218/274). Among preoperative factors, only CRM assessment on CT was independently associated with pCRM (p < 0.001). Positive ctCRM by primary tumor was an independent factor for DFS (HR, 3.362 [1.714-6.593]) and systemic recurrence (HR, 3.715 [1.787-7.724], but not for local recurrence on multivariable analyses.
    Conclusions: Preoperative CT can accurately predict pCRM, and positive ctCRM by primary tumor is an independent risk factor for DFS and systemic recurrence, but not for local recurrence in retroperitonealized colon cancer.
    Key points: • Preoperative CT can predict pathologic circumferential resection margin (CRM) with approximately 80% of accuracy in patients with retroperitonealized colon cancer. • Positive CRM by a primary tumor on preoperative CT is a poor prognostic factor for disease-free survival and systemic recurrence in patients with retroperitonealized colon cancer. • CRM involvement on CT was not associated with local recurrence in patients with retroperitonealized colon cancer.
    MeSH term(s) Male ; Humans ; Middle Aged ; Disease-Free Survival ; Neoplasm Staging ; Retrospective Studies ; Margins of Excision ; Prognosis ; Colonic Neoplasms/diagnostic imaging ; Colonic Neoplasms/surgery ; Colonic Neoplasms/pathology ; Tomography ; Rectal Neoplasms/pathology ; Neoplasm Recurrence, Local/pathology
    Language English
    Publishing date 2022-11-10
    Publishing country Germany
    Document type Journal Article
    ZDB-ID 1085366-2
    ISSN 1432-1084 ; 0938-7994 ; 1613-3749
    ISSN (online) 1432-1084
    ISSN 0938-7994 ; 1613-3749
    DOI 10.1007/s00330-022-09222-3
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  9. Article ; Online: Reply to "Radiologic Evaluation of Intrahepatic Cholangiocarcinoma Perineural Invasion".

    Seo, Nieun / Kim, Do Young / Choi, Jin-Young

    AJR. American journal of roentgenology

    2018  Volume 210, Issue 3, Page(s) W130

    MeSH term(s) Bile Duct Neoplasms ; Bile Ducts, Intrahepatic ; Cholangiocarcinoma ; Humans ; Liver Neoplasms ; Neoplasm Invasiveness ; Prognosis
    Language English
    Publishing date 2018-02-21
    Publishing country United States
    Document type Letter ; Comment
    ZDB-ID 82076-3
    ISSN 1546-3141 ; 0361-803X ; 0092-5381
    ISSN (online) 1546-3141
    ISSN 0361-803X ; 0092-5381
    DOI 10.2214/AJR.17.18977
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  10. Article ; Online: Protective effect of glycyrrhizin, a direct HMGB1 inhibitor, on post-contrast acute kidney injury.

    Oh, Hyewon / Choi, Arom / Seo, Nieun / Lim, Joon Seok / You, Je Sung / Chung, Yong Eun

    Scientific reports

    2021  Volume 11, Issue 1, Page(s) 15625

    Abstract: Post contrast-acute kidney injury (PC-AKI) is defined as the deterioration of renal function after administration of iodinated contrast media. HMGB1 is known to play an important role in the development of acute kidney injury. The purpose of this study ... ...

    Abstract Post contrast-acute kidney injury (PC-AKI) is defined as the deterioration of renal function after administration of iodinated contrast media. HMGB1 is known to play an important role in the development of acute kidney injury. The purpose of this study was to investigate the association between HMGB1 and PC-AKI and the protective effect of glycyrrhizin, a direct inhibitor of HMGB1, in rats. Rats were divided into three groups: control, PC-AKI and PC-AKI with glycyrrhizin. Oxidative stress was measured with MDA levels and H
    MeSH term(s) Acute Kidney Injury ; Animals ; Glycyrrhizic Acid ; HMGB1 Protein ; Kidney/metabolism ; Male ; Oxidative Stress ; Rats
    Chemical Substances HMGB1 Protein ; Glycyrrhizic Acid (6FO62043WK)
    Language English
    Publishing date 2021-08-02
    Publishing country England
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2615211-3
    ISSN 2045-2322 ; 2045-2322
    ISSN (online) 2045-2322
    ISSN 2045-2322
    DOI 10.1038/s41598-021-94928-5
    Database MEDical Literature Analysis and Retrieval System OnLINE

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