Korean Journal of Radiology最新文献

{"title":"Photon-Counting Computed Tomography: Experience in Musculoskeletal Imaging.","authors":"Jan-Peter Grunz, Henner Huflage","doi":"10.3348/kjr.2024.0096","DOIUrl":"10.3348/kjr.2024.0096","url":null,"abstract":"<p><p>Since the emergence of the first photon-counting computed tomography (PCCT) system in late 2021, its advantages and a wide range of applications in all fields of radiology have been demonstrated. Compared to standard energy-integrating detector-CT, PCCT allows for superior geometric dose efficiency in every examination. While this aspect by itself is groundbreaking, the advantages do not stop there. PCCT facilitates an unprecedented combination of ultra-high-resolution imaging without dose penalty or field-of-view restrictions, detector-based elimination of electronic noise, and ubiquitous multi-energy spectral information. Considering the high demands of orthopedic imaging for the visualization of minuscule details while simultaneously covering large portions of skeletal and soft tissue anatomy, no subspecialty may benefit more from this novel detector technology than musculoskeletal radiology. Deeply rooted in experimental and clinical research, this review article aims to provide an introduction to the cosmos of PCCT, explain its technical basics, and highlight the most promising applications for patient care, while also mentioning current limitations that need to be overcome.</p>","PeriodicalId":17881,"journal":{"name":"Korean Journal of Radiology","volume":"25 7","pages":"662-672"},"PeriodicalIF":4.4,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11214923/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141469125","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Radiology Workload and Staffing in Macao.","authors":"Chon Man Ieong, Soi Chau Kong","doi":"10.3348/kjr.2024.0296","DOIUrl":"10.3348/kjr.2024.0296","url":null,"abstract":"","PeriodicalId":17881,"journal":{"name":"Korean Journal of Radiology","volume":"25 7","pages":"600-602"},"PeriodicalIF":4.4,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11214928/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141469130","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Position Statements of the Emerging Trends Committee of the Asian Oceanian Society of Radiology on the Adoption and Implementation of Artificial Intelligence for Radiology.","authors":"Nicole Kessa Wee, Kim-Ann Git, Wen-Jeng Lee, Gaurang Raval, Aziz Pattokhov, Evelyn Lai Ming Ho, Chamaree Chuapetcharasopon, Noriyuki Tomiyama, Kwan Hoong Ng, Cher Heng Tan","doi":"10.3348/kjr.2024.0419","DOIUrl":"10.3348/kjr.2024.0419","url":null,"abstract":"<p><p>Artificial intelligence (AI) is rapidly gaining recognition in the radiology domain as a greater number of radiologists are becoming AI-literate. However, the adoption and implementation of AI solutions in clinical settings have been slow, with points of contention. A group of AI users comprising mainly clinical radiologists across various Asian countries, including India, Japan, Malaysia, Singapore, Taiwan, Thailand, and Uzbekistan, formed the working group. This study aimed to draft position statements regarding the application and clinical deployment of AI in radiology. The primary aim is to raise awareness among the general public, promote professional interest and discussion, clarify ethical considerations when implementing AI technology, and engage the radiology profession in the ever-changing clinical practice. These position statements highlight pertinent issues that need to be addressed between care providers and care recipients. More importantly, this will help legalize the use of non-human instruments in clinical deployment without compromising ethical considerations, decision-making precision, and clinical professional standards. We base our study on four main principles of medical care-respect for patient autonomy, beneficence, non-maleficence, and justice.</p>","PeriodicalId":17881,"journal":{"name":"Korean Journal of Radiology","volume":"25 7","pages":"603-612"},"PeriodicalIF":4.4,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11214917/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141469126","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Interventional Treatment for Iatrogenic Central Pulmonary Artery Injury Using a Vascular Plug and N-Butyl-2-Cyanoacrylate.","authors":"Lynda Nadine Gui-Bile, Raïssa Michelle Kabas, Beomsik Kang, In Joon Lee","doi":"10.3348/kjr.2024.0311","DOIUrl":"10.3348/kjr.2024.0311","url":null,"abstract":"","PeriodicalId":17881,"journal":{"name":"Korean Journal of Radiology","volume":"25 7","pages":"684-686"},"PeriodicalIF":4.4,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11214922/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141469062","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"2023 Survey on User Experience of Artificial Intelligence Software in Radiology by the Korean Society of Radiology.","authors":"Eui Jin Hwang, Ji Eun Park, Kyoung Doo Song, Dong Hyun Yang, Kyung Won Kim, June-Goo Lee, Jung Hyun Yoon, Kyunghwa Han, Dong Hyun Kim, Hwiyoung Kim, Chang Min Park","doi":"10.3348/kjr.2023.1246","DOIUrl":"10.3348/kjr.2023.1246","url":null,"abstract":"<p><strong>Objective: </strong>In Korea, radiology has been positioned towards the early adoption of artificial intelligence-based software as medical devices (AI-SaMDs); however, little is known about the current usage, implementation, and future needs of AI-SaMDs. We surveyed the current trends and expectations for AI-SaMDs among members of the Korean Society of Radiology (KSR).</p><p><strong>Materials and methods: </strong>An anonymous and voluntary online survey was open to all KSR members between April 17 and May 15, 2023. The survey was focused on the experiences of using AI-SaMDs, patterns of usage, levels of satisfaction, and expectations regarding the use of AI-SaMDs, including the roles of the industry, government, and KSR regarding the clinical use of AI-SaMDs.</p><p><strong>Results: </strong>Among the 370 respondents (response rate: 7.7% [370/4792]; 340 board-certified radiologists; 210 from academic institutions), 60.3% (223/370) had experience using AI-SaMDs. The two most common use-case of AI-SaMDs among the respondents were lesion detection (82.1%, 183/223), lesion diagnosis/classification (55.2%, 123/223), with the target imaging modalities being plain radiography (62.3%, 139/223), CT (42.6%, 95/223), mammography (29.1%, 65/223), and MRI (28.7%, 64/223). Most users were satisfied with AI-SaMDs (67.6% [115/170, for improvement of patient management] to 85.1% [189/222, for performance]). Regarding the expansion of clinical applications, most respondents expressed a preference for AI-SaMDs to assist in detection/diagnosis (77.0%, 285/370) and to perform automated measurement/quantification (63.5%, 235/370). Most respondents indicated that future development of AI-SaMDs should focus on improving practice efficiency (81.9%, 303/370) and quality (71.4%, 264/370). Overall, 91.9% of the respondents (340/370) agreed that there is a need for education or guidelines driven by the KSR regarding the use of AI-SaMDs.</p><p><strong>Conclusion: </strong>The penetration rate of AI-SaMDs in clinical practice and the corresponding satisfaction levels were high among members of the KSR. Most AI-SaMDs have been used for lesion detection, diagnosis, and classification. Most respondents requested KSR-driven education or guidelines on the use of AI-SaMDs.</p>","PeriodicalId":17881,"journal":{"name":"Korean Journal of Radiology","volume":"25 7","pages":"613-622"},"PeriodicalIF":4.4,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11214921/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141469078","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Diffusion-Weighted MRI for the Assessment of Molecular Prognostic Biomarkers in Breast Cancer.","authors":"Mami Iima, Masako Kataoka, Maya Honda, Denis Le Bihan","doi":"10.3348/kjr.2023.1188","DOIUrl":"10.3348/kjr.2023.1188","url":null,"abstract":"<p><p>This study systematically reviewed the role of diffusion-weighted imaging (DWI) in the assessment of molecular prognostic biomarkers in breast cancer, focusing on the correlation of apparent diffusion coefficient (ADC) with hormone receptor status and prognostic biomarkers. Our meta-analysis includes data from 52 studies examining ADC values in relation to estrogen receptor (ER), progesterone receptor (PgR), human epidermal growth factor receptor 2 (HER2), and Ki-67 status. The results indicated significant differences in ADC values among different receptor statuses, with ER-positive, PgR-positive, HER2-negative, and Ki-67-positive tumors having lower ADC values compared to their negative counterparts. This study also highlights the potential of advanced DWI techniques such as intravoxel incoherent motion and non-Gaussian DWI to provide additional insights beyond ADC. Despite these promising findings, the high heterogeneity among the studies underscores the need for standardized DWI protocols to improve their clinical utility in breast cancer management.</p>","PeriodicalId":17881,"journal":{"name":"Korean Journal of Radiology","volume":"25 7","pages":"623-633"},"PeriodicalIF":4.4,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11214919/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141469061","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Predicting Recurrence-Free Survival After Upfront Surgery in Resectable Pancreatic Ductal Adenocarcinoma: A Preoperative Risk Score Based on CA 19-9, CT, and ¹⁸F-FDG PET/CT.","authors":"Boryeong Jeong, Minyoung Oh, Seung Soo Lee, Nayoung Kim, Jae Seung Kim, Woohyung Lee, Song Cheol Kim, Hyoung Jung Kim, Jin Hee Kim, Jae Ho Byun","doi":"10.3348/kjr.2023.1235","DOIUrl":"10.3348/kjr.2023.1235","url":null,"abstract":"<p><strong>Objective: </strong>To develop and validate a preoperative risk score incorporating carbohydrate antigen (CA) 19-9, CT, and fluorine-18-fluorodeoxyglucose (¹⁸F-FDG) PET/CT variables to predict recurrence-free survival (RFS) after upfront surgery in patients with resectable pancreatic ductal adenocarcinoma (PDAC).</p><p><strong>Materials and methods: </strong>Patients with resectable PDAC who underwent upfront surgery between 2014 and 2017 (development set) or between 2018 and 2019 (test set) were retrospectively evaluated. In the development set, a risk-scoring system was developed using the multivariable Cox proportional hazards model, including variables associated with RFS. In the test set, the performance of the risk score was evaluated using the Harrell C-index and compared with that of the postoperative pathological tumor stage.</p><p><strong>Results: </strong>A total of 529 patients, including 335 (198 male; mean age ± standard deviation, 64 ± 9 years) and 194 (103 male; mean age, 66 ± 9 years) patients in the development and test sets, respectively, were evaluated. The risk score included five variables predicting RFS: tumor size (hazard ratio [HR], 1.29 per 1 cm increment; <i>P</i> < 0.001), maximal standardized uptake values of tumor ≥ 5.2 (HR, 1.29; <i>P</i> = 0.06), suspicious regional lymph nodes (HR, 1.43; <i>P</i> = 0.02), possible distant metastasis on ¹⁸F-FDG PET/CT (HR, 2.32; <i>P</i> = 0.03), and CA 19-9 (HR, 1.02 per 100 U/mL increment; <i>P</i> = 0.002). In the test set, the risk score showed good performance in predicting RFS (C-index, 0.61), similar to that of the pathologic tumor stage (C-index, 0.64; <i>P</i> = 0.17).</p><p><strong>Conclusion: </strong>The proposed risk score based on preoperative CA 19-9, CT, and ¹⁸F-FDG PET/CT variables may have clinical utility in selecting high-risk patients with resectable PDAC.</p>","PeriodicalId":17881,"journal":{"name":"Korean Journal of Radiology","volume":"25 7","pages":"644-655"},"PeriodicalIF":4.4,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11214925/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141469127","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Diagnostic Efficacy and Safety of Low-Contrast-Dose Dual-Energy CT in Patients With Renal Impairment Undergoing Transcatheter Aortic Valve Replacement.","authors":"Suyon Chang, Jung Im Jung, Kyongmin Sarah Beck, Kiyuk Chang, Yaeni Kim, Kyunghwa Han","doi":"10.3348/kjr.2023.1207","DOIUrl":"10.3348/kjr.2023.1207","url":null,"abstract":"<p><strong>Objective: </strong>This study aimed to evaluate the diagnostic efficacy and safety of low-contrast-dose, dual-source dual-energy CT before transcatheter aortic valve replacement (TAVR) in patients with compromised renal function.</p><p><strong>Materials and methods: </strong>A total of 54 consecutive patients (female:male, 26:38; 81.9 ± 7.3 years) with reduced renal function underwent pre-TAVR dual-energy CT with a 30-mL contrast agent between June 2022 and March 2023. Monochromatic (40- and 50-keV) and conventional (120-kVp) images were reconstructed and analyzed. The subjective quality score, vascular attenuation, contrast-to-noise ratio (CNR), and signal-to-noise ratio (SNR) were compared among the imaging techniques using the Friedman test and post-hoc analysis. Interobserver reliability for aortic annular measurement was assessed using the intraclass correlation coefficient (ICC) and Bland-Altman analysis. The procedural outcomes and incidence of post-contrast acute kidney injury (AKI) were assessed.</p><p><strong>Results: </strong>Monochromatic images achieved diagnostic quality in all patients. The 50-keV images achieved superior vascular attenuation and CNR (<i>P</i> < 0.001 in all) while maintaining a similar SNR compared to conventional CT. For aortic annular measurement, the 50-keV images showed higher interobserver reliability compared to conventional CT: ICC, 0.98 vs. 0.90 for area and 0.97 vs. 0.95 for perimeter; 95% limits of agreement width, 0.63 cm² vs. 0.92 cm² for area and 5.78 mm vs. 8.50 mm for perimeter. The size of the implanted device matched CT-measured values in all patients, achieving a procedural success rate of 92.6%. No patient experienced a serum creatinine increase of ≥ 1.5 times baseline in the 48-72 hours following CT. However, one patient had a procedural delay due to gradual renal function deterioration.</p><p><strong>Conclusion: </strong>Low-contrast-dose imaging with 50-keV reconstruction enables precise pre-TAVR evaluation with improved image quality and minimal risk of post-contrast AKI. This approach may be an effective and safe option for pre-TAVR evaluation in patients with compromised renal function.</p>","PeriodicalId":17881,"journal":{"name":"Korean Journal of Radiology","volume":"25 7","pages":"634-643"},"PeriodicalIF":4.4,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11214918/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141469080","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Assessment of Treatment Response in Patients With Severe Asthma Using Visual and Quantitative Analysis of Chest CT.","authors":"Han Na Lee, Jin An, Miji Lee, Hye Jeon Hwang, Jooae Choe, Jihye Yoon, Ji-Hyang Lee, Min-Hye Kim, Young-Joo Cho, Sang Min Lee, Tae-Bum Kim, Joon Beom Seo","doi":"10.3348/kjr.2024.0110","DOIUrl":"10.3348/kjr.2024.0110","url":null,"abstract":"<p><strong>Objective: </strong>To evaluate the role of visual and quantitative chest CT parameters in assessing treatment response in patients with severe asthma.</p><p><strong>Materials and methods: </strong>Korean participants enrolled in a prospective multicenter study, named the Precision Medicine Intervention in Severe Asthma study, from May 2020 to August 2021, underwent baseline and follow-up chest CT scans (inspiration/expiration) 10-12 months apart, before and after biologic treatment. Two radiologists scored bronchiectasis severity and mucus plugging extent. Quantitative parameters were obtained from each CT scan as follows: normal lung area (normal), air trapping without emphysema (AT without emph), air trapping with emphysema (AT with emph), and airway (total branch count, Pi10). Clinical parameters, including pulmonary function tests (forced expiratory volume in 1 s [FEV1] and FEV1/forced vital capacity [FVC]), sputum and blood eosinophil count, were assessed at initial and follow-up stages. Changes in CT parameters were correlated with changes in clinical parameters using Pearson or Spearman correlation.</p><p><strong>Results: </strong>Thirty-four participants (female:male, 20:14; median age, 50.5 years) diagnosed with severe asthma from three centers were included. Changes in the bronchiectasis and mucus plugging extent scores were negatively correlated with changes in FEV1 and FEV1/FVC (ρ = from -0.544 to -0.368, all <i>P</i> < 0.05). Changes in quantitative CT parameters were correlated with changes in FEV1 (normal, <i>r</i> = 0.373 [<i>P</i> = 0.030], AT without emph, <i>r</i> = -0.351 [<i>P</i> = 0.042]), FEV1/FVC (normal, <i>r</i> = 0.390 [<i>P</i> = 0.022], AT without emph, <i>r</i> = -0.370 [<i>P</i> = 0.031]). Changes in total branch count were positively correlated with changes in FEV1 (<i>r</i> = 0.349 [<i>P</i> = 0.043]). There was no correlation between changes in Pi10 and the clinical parameters (<i>P</i> > 0.05).</p><p><strong>Conclusion: </strong>Visual and quantitative CT parameters of normal, AT without emph, and total branch count may be effective for evaluating treatment response in patients with severe asthma.</p>","PeriodicalId":17881,"journal":{"name":"Korean Journal of Radiology","volume":"25 7","pages":"673-683"},"PeriodicalIF":4.4,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11214920/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141469079","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Radiology Loading and Coverage Hours in Indonesia.","authors":"Reyhan Eddy Yunus","doi":"10.3348/kjr.2024.0267","DOIUrl":"10.3348/kjr.2024.0267","url":null,"abstract":"","PeriodicalId":17881,"journal":{"name":"Korean Journal of Radiology","volume":"25 7","pages":"597-599"},"PeriodicalIF":4.4,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11214927/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141469129","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}