Taehan Yongsang Uihakhoe chi最新文献

{"title":"CT Examinations for COVID-19: A Systematic Review of Protocols, Radiation Dose, and Numbers Needed to Diagnose and Predict.","authors":"Jong Hyuk Lee,&nbsp;Hyunsook Hong,&nbsp;Hyungjin Kim,&nbsp;Chang Hyun Lee,&nbsp;Jin Mo Goo,&nbsp;Soon Ho Yoon","doi":"10.3348/jksr.2021.0096","DOIUrl":"10.3348/jksr.2021.0096","url":null,"abstract":"<p><strong>Purpose: </strong>Although chest CT has been discussed as a first-line test for coronavirus disease 2019 (COVID-19), little research has explored the implications of CT exposure in the population. To review chest CT protocols and radiation doses in COVID-19 publications and explore the number needed to diagnose (NND) and the number needed to predict (NNP) if CT is used as a first-line test.</p><p><strong>Materials and methods: </strong>We searched nine highly cited radiology journals to identify studies discussing the CT-based diagnosis of COVID-19 pneumonia. Study-level information on the CT protocol and radiation dose was collected, and the doses were compared with each national diagnostic reference level (DRL). The NND and NNP, which depends on the test positive rate (TPR), were calculated, given a CT sensitivity of 94% (95% confidence interval [CI]: 91%-96%) and specificity of 37% (95% CI: 26%-50%), and applied to the early outbreak in Wuhan, New York, and Italy.</p><p><strong>Results: </strong>From 86 studies, the CT protocol and radiation dose were reported in 81 (94.2%) and 17 studies (19.8%), respectively. Low-dose chest CT was used more than twice as often as standard-dose chest CT (39.5% vs.18.6%), while the remaining studies (44.2%) did not provide relevant information. The radiation doses were lower than the national DRLs in 15 of the 17 studies (88.2%) that reported doses. The NND was 3.2 scans (95% CI: 2.2-6.0). The NNPs at TPRs of 50%, 25%, 10%, and 5% were 2.2, 3.6, 8.0, 15.5 scans, respectively. In Wuhan, 35418 (TPR, 58%; 95% CI: 27710-56755) to 44840 (TPR, 38%; 95% CI: 35161-68164) individuals were estimated to have undergone CT examinations to diagnose 17365 patients. During the early surge in New York and Italy, daily NNDs changed up to 5.4 and 10.9 times, respectively, within 10 weeks.</p><p><strong>Conclusion: </strong>Low-dose CT protocols were described in less than half of COVID-19 publications, and radiation doses were frequently lacking. The number of populations involved in a first-line diagnostic CT test could vary dynamically according to daily TPR; therefore, caution is required in future planning.</p>","PeriodicalId":74904,"journal":{"name":"Taehan Yongsang Uihakhoe chi","volume":"82 6","pages":"1505-1523"},"PeriodicalIF":0.0,"publicationDate":"2021-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ftp.ncbi.nlm.nih.gov/pub/pmc/oa_pdf/25/a4/jksr-82-1505.PMC9431975.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"33512657","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}

{"title":"Early Imaging Findings of Hypertrophic Osteoarthropathy Mimicking Bone Metastasis from Extrathoracic Malignancy.","authors":"Ji Yeon Hwang,&nbsp;Jang Gyu Cha,&nbsp;Yu Sung Yoon,&nbsp;Ahrim Moon","doi":"10.3348/jksr.2020.0154","DOIUrl":"10.3348/jksr.2020.0154","url":null,"abstract":"<p><p>Hypertrophic osteoarthropathy (HOA) is a syndrome characterized by digital clubbing, periosteal bone formation, and synovial effusions. Secondary HOA is associated with intrathoracic malignancy in most cases; however, in rare cases, HOA can be caused by extrathoracic conditions. We report early ultrasound, computed tomography, magnetic resonance imaging, and bone scintigraphy findings of HOA in a patient with breast cancer. Its ambiguous clinical and imaging findings that mimicked malignant conditions are particularly interesting and informative.</p>","PeriodicalId":74904,"journal":{"name":"Taehan Yongsang Uihakhoe chi","volume":"82 6","pages":"1606-1612"},"PeriodicalIF":0.0,"publicationDate":"2021-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ftp.ncbi.nlm.nih.gov/pub/pmc/oa_pdf/28/66/jksr-82-1606.PMC9431980.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"33510984","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}

{"title":"CT Findings of Central Airway Lesions Causing Airway Stenosis-Visualization and Quantification: A Pictorial Essay.","authors":"Myeong Jin Choi,&nbsp;Hee Kang","doi":"10.3348/jksr.2020.0212","DOIUrl":"https://doi.org/10.3348/jksr.2020.0212","url":null,"abstract":"<p><p>The tracheobronchial tree is a system of airways that allows the passage of air to aerate the lungs and entire body. Several pathological conditions can affect this anatomical region. Multidetector CT (MDCT) helps identify and characterize various large airway diseases. Post-processing tools, such as virtual bronchoscopy and automatic lung analysis, can help enhance the performance of imaging studies. In this pictorial essay review, we provide imaging findings of various bronchial lesions manifested as wall thickening and endoluminal nodules on conventional MDCT and advanced image visualization and analysis.</p>","PeriodicalId":74904,"journal":{"name":"Taehan Yongsang Uihakhoe chi","volume":"82 6","pages":"1441-1476"},"PeriodicalIF":0.0,"publicationDate":"2021-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ftp.ncbi.nlm.nih.gov/pub/pmc/oa_pdf/b9/2a/jksr-82-1441.PMC9431977.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"33512285","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}

{"title":"[Partial-Thickness Tear of Supraspinatus and Infraspinatus Tendon Revisited: Based on MR Findings].","authors":"Sinhye Song,&nbsp;Seul Ki Lee,&nbsp;Jee-Young Kim","doi":"10.3348/jksr.2021.0124","DOIUrl":"10.3348/jksr.2021.0124","url":null,"abstract":"<p><p>The interpretation of MRI of partial-thickness rotator cuff tears can be challenging. This review describes the anatomic considerations for diagnosing partial-thickness tears, especially supraspinatus and infraspinatus tendon and summarizes the classification of partial-thickness rotator cuff tears, as well as provides an overview on partial-thickness tears with delamination.</p>","PeriodicalId":74904,"journal":{"name":"Taehan Yongsang Uihakhoe chi","volume":"82 6","pages":"1366-1387"},"PeriodicalIF":0.0,"publicationDate":"2021-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ftp.ncbi.nlm.nih.gov/pub/pmc/oa_pdf/fe/25/jksr-82-1366.PMC9431970.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"33512288","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}

{"title":"Endovascular Treatment of a Lumbar Spinal Epidural Arteriovenous Fistula with Radiculopathy: A Case Report.","authors":"Hyun Hwang,&nbsp;Jae Ho Shin,&nbsp;Jae Taek Hong,&nbsp;Yon Kwon Ihn","doi":"10.3348/jksr.2020.0188","DOIUrl":"10.3348/jksr.2020.0188","url":null,"abstract":"<p><p>Spinal epidural arteriovenous fistulas (SEDAVFs) are rare spinal vascular malformations that are difficult to diagnose and treat. SEDAVFs can be asymptomatic; however, symptoms can arise from the compression of adjacent nerve roots by dilated vein and perimedullary venous reflux, caused by shunting into the epidural venous plexus. A 31-year-old male presented to our institution with a 2-year history of progressively worsening low-back pain, radiating thigh pain, and sensory changes in his lower extremities. MRI and CT angiography demonstrated dilated epidural vascular lesion compressing the nerve root. The SEDAVF was embolized with multiple coils, which alleviated the nerve root compression from the engorged venous varix and improved the patient's radiculopathy. Our experience from this case shows that endovascular coil embolization using the transarterial approach can be an effective treatment for SEDAVF and an alternative to surgical ligations.</p>","PeriodicalId":74904,"journal":{"name":"Taehan Yongsang Uihakhoe chi","volume":"82 6","pages":"1628-1633"},"PeriodicalIF":0.0,"publicationDate":"2021-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ftp.ncbi.nlm.nih.gov/pub/pmc/oa_pdf/13/b2/jksr-82-1628.PMC9431973.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"33512658","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}

{"title":"[Dilatation of Superior Ophthalmic Vein and Visual Disturbance by Central Venous Stenosis: A Case Mimicking Cavernous Sinus Dural Arteriovenous Fistula].","authors":"Young Hun Jeon,&nbsp;Kyung Sik Yi,&nbsp;Chi Hoon Choi,&nbsp;Yook Kim,&nbsp;Yeong Tae Park","doi":"10.3348/jksr.2021.0059","DOIUrl":"https://doi.org/10.3348/jksr.2021.0059","url":null,"abstract":"<p><p>Central venous stenosis is a relatively common complication in hemodialysis patients; however, jugular venous reflux (JVR) and increased intracranial pressure are rare, and associated progressive visual disturbance was reported in only a few cases. Here, we report a case of JVR with visual disturbance and increased intracranial pressure. Notably, the MRI was accompanied by a dilatation of the superior ophthalmic vein, which was mistaken for a cavernous sinus dural arteriovenous fistula (CSdAVF). The patient had JVR on time-of-flight MR angiography (TOF-MRA) and severe stenosis of the left brachiocephalic vein on conventional angiography. After balloon angioplasty for central venous stenosis, he was discharged after improvement of his visual disturbance. Although JVR due to central venous stenosis and CSdAVF might show similar symptoms, treatment plans are different. Therefore, it is important to distinguish radiologically based on a thorough review of MRI and TOF-MRA and confirm the central venous stenosis on cerebral angiography for the accurate diagnosis.</p>","PeriodicalId":74904,"journal":{"name":"Taehan Yongsang Uihakhoe chi","volume":"82 6","pages":"1619-1627"},"PeriodicalIF":0.0,"publicationDate":"2021-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ftp.ncbi.nlm.nih.gov/pub/pmc/oa_pdf/ba/91/jksr-82-1619.PMC9431976.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"33512655","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}

{"title":"Utility of the 16-cm Axial Volume Scan Technique for Coronary Artery Calcium Scoring on Non-Enhanced Chest CT: A Prospective Pilot Study.","authors":"So Jung Ki,&nbsp;Chul Hwan Park,&nbsp;Kyunghwa Han,&nbsp;Jae Min Shin,&nbsp;Ji Young Kim,&nbsp;Tae Hoon Kim","doi":"10.3348/jksr.2020.0156","DOIUrl":"https://doi.org/10.3348/jksr.2020.0156","url":null,"abstract":"<p><strong>Purpose: </strong>This study aimed to evaluate the utility of the 16-cm axial volume scan technique for calculating the coronary artery calcium score (CACS) using non-enhanced chest CT.</p><p><strong>Materials and methods: </strong>This study prospectively enrolled 20 participants who underwent both, non-enhanced chest CT (16-cm-coverage axial volume scan technique) and calcium-score CT, with the same parameters, differing only in slice thickness (in non-enhanced chest CT = 0.625, 1.25, 2.5 mm; in calcium score CT = 2.5 mm). The CACS was calculated using the conventional Agatston method. The difference between the CACS obtained from the two CT scans was compared, and the degree of agreement for the clinical significance of the CACS was confirmed through sectional analysis. Each calcified lesion was classified by location and size, and a one-to-one comparison of non-contrast-enhanced chest CT and calcium score CT was performed.</p><p><strong>Results: </strong>The correlation coefficients of the CACS obtained from the two CT scans for slice thickness of 2.5, 1.25, and 0.625 mm were 0.9850, 0.9688, and 0.9834, respectively. The mean differences between the CACS were -21.4% at 0.625 mm, -39.4% at 1.25 mm, and -76.2% at 2.5 mm slice thicknesses. Sectional analysis revealed that 16 (80%), 16 (80%), and 13 (65%) patients showed agreement for the degree of coronary artery disease at each slice interval, respectively. Inter-reader agreement was high for each slice interval. The 0.625 mm CT showed the highest sensitivity for detecting calcified lesions.</p><p><strong>Conclusion: </strong>The values in the non-contrast-enhanced chest CT, using the 16-cm axial volume scan technique, were similar to those obtained using the CACS in the calcium score CT, at 0.625 mm slice thickness without electrocardiogram gating. This can ultimately help predict cardiovascular risk without additional radiation exposure.</p>","PeriodicalId":74904,"journal":{"name":"Taehan Yongsang Uihakhoe chi","volume":"82 6","pages":"1493-1504"},"PeriodicalIF":0.0,"publicationDate":"2021-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ftp.ncbi.nlm.nih.gov/pub/pmc/oa_pdf/be/bf/jksr-82-1493.PMC9431984.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"33512163","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}

{"title":"Quantification of the Elastic Property of Normal Thigh Muscles Using MR Elastography: Our Initial Experience.","authors":"Junghoon Kim,&nbsp;Jeong Ah Ryu,&nbsp;Juhan Lee","doi":"10.3348/jksr.2020.0133","DOIUrl":"10.3348/jksr.2020.0133","url":null,"abstract":"<p><strong>Purpose: </strong>This study aimed to apply MR elastography (MRE) to achieve <i>in vivo</i> evaluation of the elastic properties of thigh muscles and validate the feasibility of quantifying the elasticity of normal thigh muscles using MRE.</p><p><strong>Materials and methods: </strong>This prospective study included 10 volunteer subjects [mean age, 32.5 years, (range, 23-45 years)] who reported normal activities of daily living and underwent both T2-weighted axial images and MRE of thigh muscles on the same day. A sequence with a motion-encoding gradient was used in the MRE to map the propagating shear waves in the muscle. Elastic properties were quantified as the shear modulus of the following four thigh muscles at rest; the vastus medialis, vastus lateralis, adductor magnus, and biceps femoris.</p><p><strong>Results: </strong>The mean shear modulus was 0.98 ± 0.32 kPa and 1.00 ± 0.33 kPa for the vastus medialis, 1.10 ± 0.46 kPa and 1.07 ± 0.43 kPa for the vastus lateralis, 0.91 ± 0.41 kPa and 0.93 ± 0.47 kPa for the adductor magnus, and 0.99 ± 0.37 kPa and 0.94 ± 0.32 kPa for the biceps femoris, with reader 1 and 2, respectively. No significant difference was observed in the shear modulus based on sex (<i>p</i> < 0.05). Aging consistently showed a statistically significant negative correlation (<i>p</i> < 0.05) with the shear modulus of the thigh muscles, except for the vastus medialis (<i>p</i> = 0.194 for reader 1 and <i>p</i> = 0.355 for reader 2).</p><p><strong>Conclusion: </strong>MRE is a quantitative technique used to measure the elastic properties of individual muscles with excellent inter-observer agreement. Age was consistently significantly negatively correlated with the shear stiffness of muscles, except for the vastus medialis.</p>","PeriodicalId":74904,"journal":{"name":"Taehan Yongsang Uihakhoe chi","volume":"82 6","pages":"1556-1564"},"PeriodicalIF":0.0,"publicationDate":"2021-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ftp.ncbi.nlm.nih.gov/pub/pmc/oa_pdf/9d/b9/jksr-82-1556.PMC9431979.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"33510987","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}

{"title":"Syringomatous Adenoma of the Nipple on Screening Mammography: A Case Report.","authors":"Min Hyeok Yoon,&nbsp;Hye Jung Kim,&nbsp;Won Hwa Kim,&nbsp;Jeeyeon Lee,&nbsp;Ji-Young Park,&nbsp;Jin Young Kim","doi":"10.3348/jksr.2020.0184","DOIUrl":"https://doi.org/10.3348/jksr.2020.0184","url":null,"abstract":"<p><p>Syringomatous adenoma of the nipples, first reported in 1983, is an extremely rare benign tumor extending to the subareolar area and, pathologically, has a shape similar to that of sweat gland tumors. Radiologically, infiltrating patterns and calcifications can cause misdiagnosis of malignant tumors. The authors report a case of syringomatous adenoma that shows only calcifications of the nipple in a screening mammography.</p>","PeriodicalId":74904,"journal":{"name":"Taehan Yongsang Uihakhoe chi","volume":"82 6","pages":"1565-1569"},"PeriodicalIF":0.0,"publicationDate":"2021-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ftp.ncbi.nlm.nih.gov/pub/pmc/oa_pdf/b4/9c/jksr-82-1565.PMC9431981.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"33512162","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}

{"title":"Chest Radiographs and CT Findings during Healthcare Workers' Tuberculosis Screening Using Interferon-Gamma Release Assay: Retrospective Observational Study.","authors":"Ye Ra Choi,&nbsp;Jung-Kyu Lee,&nbsp;Eun Young Heo,&nbsp;Deog Kyeom Kim,&nbsp;Kwang Nam Jin","doi":"10.3348/jksr.2020.0160","DOIUrl":"https://doi.org/10.3348/jksr.2020.0160","url":null,"abstract":"<p><strong>Purpose: </strong>To investigate the incidence of tuberculosis (TB) in healthcare workers (HCWs) with positive interferon-gamma release assay (IGRA) results based on chest X-ray (CXR) and CT findings and determine the role of imaging in the diagnosis of TB.</p><p><strong>Materials and methods: </strong>Among 1976 hospital personnel screened for TB using IGRA, IGRA-positive subjects were retrospectively investigated. Clustered nodular and/or linear streaky opacities in the upper lung zone were considered positive on CXR. The CT findings were classified as active, indeterminate, inactive, or normal. The active or indeterminate class was considered CT-positive.</p><p><strong>Results: </strong>IGRA was positive in 255 subjects (12.9%). CXR and CT were performed in 249 (99.2%) and 113 subjects (45.0%), respectively. CXR- and CT-positive findings were found in 7 of 249 (2.8%) and 9 of 113 (8.0%) patients, respectively. Among the nine CT-positive subjects, active and indeterminate TB findings were found in 6 (5.3%) and 3 (2.7%) patients, respectively. Microbiological tests, including acid-fast bacilli staining, culture, and polymerase chain reaction for TB, were negative in all nine CT-positive subjects. Empirical anti-TB medications were administered to 9 CT-positive subjects, and 3 of these nine subjects were CXR-negative for pulmonary TB.</p><p><strong>Conclusion: </strong>CT helped diagnose asymptomatic TB in IGRA-positive HCWs.</p>","PeriodicalId":74904,"journal":{"name":"Taehan Yongsang Uihakhoe chi","volume":"82 6","pages":"1524-1533"},"PeriodicalIF":0.0,"publicationDate":"2021-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ftp.ncbi.nlm.nih.gov/pub/pmc/oa_pdf/49/94/jksr-82-1524.PMC9431965.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"33512282","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}