Pneumonia Associated with 2019 Novel Coronavirus: Can Computed Tomographic Findings Help Predict the Prognosis of the Disease?
Authors: Lee KS PMID: 32056396 [PubMed - as supplied by publisher] (Source: Korean Journal of Radiology)
Source: Korean Journal of Radiology - February 15, 2020 Category: Radiology Tags: Korean J Radiol Source Type: research

Novel Coronavirus Pneumonia Outbreak in 2019: Computed Tomographic Findings in Two Cases.
Authors: Lin X, Gong Z, Xiao Z, Xiong J, Fan B, Liu J Abstract Since the 2019 novel coronavirus (2019-nCoV or officially named by the World Health Organization as COVID-19) outbreak in Wuhan, Hubei Province, China in 2019, there have been a few reports of its imaging findings. Here, we report two confirmed cases of 2019-nCoV pneumonia with chest computed tomography findings of multiple regions of patchy consolidation and ground-glass opacities in both lungs. These findings were characteristically located along the bronchial bundle or subpleural lungs. PMID: 32056397 [PubMed - as supplied by publisher] (Source: ...
Source: Korean Journal of Radiology - February 15, 2020 Category: Radiology Tags: Korean J Radiol Source Type: research

A Glimpse on Trends and Characteristics of Recent Articles Published in the Korean Journal of Radiology.
Authors: Choe YH PMID: 31854145 [PubMed - in process] (Source: Korean Journal of Radiology)
Source: Korean Journal of Radiology - December 20, 2019 Category: Radiology Tags: Korean J Radiol Source Type: research

Guidelines for Cardiovascular Magnetic Resonance Imaging from the Korean Society of Cardiovascular Imaging-Part 3: Perfusion, Delayed Enhancement, and T1- and T2 Mapping.
Authors: Im DJ, Hong SJ, Park EA, Kim EY, Jo Y, Kim J, Park CH, Yong HS, Lee JW, Hur JH, Yang DH, Lee BY Abstract This document is the third part of the guidelines for the protocol, the interpretation and post-processing of cardiac magnetic resonance (CMR) studies. These consensus recommendations have been developed by the Consensus Committee of the Korean Society of Cardiovascular Imaging to standardize the requirements for image interpretation and post-processing of CMR. This third part of the recommendations describes tissue characterization modules, including perfusion, late gadolinium enhancement, and T1- and ...
Source: Korean Journal of Radiology - December 20, 2019 Category: Radiology Tags: Korean J Radiol Source Type: research

Clinical Applications of Wide-Detector CT Scanners for Cardiothoracic Imaging: An Update.
This article investigates the technical developments in wide-detector CT scanners, summarizes their clinical applications in the cardiothoracic area, and provides a review of the recent literature. PMID: 31854147 [PubMed - in process] (Source: Korean Journal of Radiology)
Source: Korean Journal of Radiology - December 20, 2019 Category: Radiology Tags: Korean J Radiol Source Type: research

Rapid Imaging: Recent Advances in Abdominal MRI for Reducing Acquisition Time and Its Clinical Applications.
Authors: Yoon JH, Nickel MD, Peeters JM, Lee JM Abstract Magnetic resonance imaging (MRI) plays an important role in abdominal imaging. The high contrast resolution offered by MRI provides better lesion detection and its capacity to provide multiparametric images facilitates lesion characterization more effectively than computed tomography. However, the relatively long acquisition time of MRI often detrimentally affects the image quality and limits its accessibility. Recent developments have addressed these drawbacks. Specifically, multiphasic acquisition of contrast-enhanced MRI, free-breathing dynamic MRI using c...
Source: Korean Journal of Radiology - December 20, 2019 Category: Radiology Tags: Korean J Radiol Source Type: research

Intraindividual Comparison between Gadoxetate-Enhanced Magnetic Resonance Imaging and Dynamic Computed Tomography for Characterizing Focal Hepatic Lesions: A Multicenter, Multireader Study.
Authors: An C, Lee CH, Byun JH, Lee MH, Jeong WK, Choi SH, Kim DY, Lim YS, Kim YS, Kim JH, Choi MS, Kim MJ Abstract OBJECTIVE: To compare the diagnostic accuracy of dynamic computed tomography (CT) and gadoxetate-enhanced magnetic resonance imaging (MRI) for characterization of hepatic lesions by using the Liver Imaging Reporting and Data System (LI-RADS) in a multicenter, off-site evaluation. MATERIALS AND METHODS: In this retrospective multicenter study, we evaluated 231 hepatic lesions (114 hepatocellular carcinomas [HCCs], 58 non-HCC malignancies, and 59 benign lesions) confirmed histologically in 217 patie...
Source: Korean Journal of Radiology - December 20, 2019 Category: Radiology Tags: Korean J Radiol Source Type: research

Doppler US and CT Diagnosis of Nutcracker Syndrome.
Authors: Kim SH Abstract Nutcracker syndrome (NCS) is a syndrome caused by compression of the left renal vein (LRV), between the abdominal aorta and the superior mesenteric artery, resulting in hypertension of the LRV and hematuria. Doppler ultrasonography (US) has been commonly used for the diagnosis of NCS. However, several technical issues, such as Doppler angle and sample volume, need to be considered to obtain satisfactory results. In addition, morphologic changes of the LRV and a jetting phenomenon across the aortomesenteric portion of the LRV on contrast-enhanced computed tomography (CECT) are diagnostic clu...
Source: Korean Journal of Radiology - December 20, 2019 Category: Radiology Tags: Korean J Radiol Source Type: research

Effect of Different Types of Mammography Equipment on Screening Outcomes: A Report by the Alliance for Breast Cancer Screening in Korea.
Authors: Choi BH, Lee EH, Jun JK, Kim KW, Park YM, Kim HW, Kim YM, Shin DR, Lim HS, Park JS, Kim HJ, Alliance for Breast Cancer Screening in Korea (ABCS-K) Abstract OBJECTIVE: To investigate the effects of different types of mammography equipment on screening outcomes by comparing the performance of film-screen mammography (FSM), computed radiography mammography (CRM), and digital mammography (DM). MATERIALS AND METHODS: We retrospectively enrolled 128756 sets of mammograms from 10 hospitals participating in the Alliance for Breast Cancer Screening in Korea between 2005 and 2010. We compared the diagnostic accu...
Source: Korean Journal of Radiology - December 20, 2019 Category: Radiology Tags: Korean J Radiol Source Type: research

Scoring System to Stratify Malignancy Risks for Mammographic Microcalcifications Based on Breast Imaging Reporting and Data System 5th Edition Descriptors.
Authors: Youk JH, Gweon HM, Son EJ, Eun NL, Choi EJ, Kim JA Abstract OBJECTIVE: To develop a scoring system stratifying the malignancy risk of mammographic microcalcifications using the 5th edition of the Breast Imaging Reporting and Data System (BI-RADS). MATERIALS AND METHODS: One hundred ninety-four lesions with microcalcifications for which surgical excision was performed were independently reviewed by two radiologists according to the 5th edition of BI-RADS. Each category's positive predictive value (PPV) was calculated and a scoring system was developed using multivariate logistic regression. The scores f...
Source: Korean Journal of Radiology - December 20, 2019 Category: Radiology Tags: Korean J Radiol Source Type: research

US-Guided Radiofrequency Ablation for Low-Risk Papillary Thyroid Microcarcinoma: Efficacy and Safety in a Large Population.
CONCLUSION: Our results suggest that RFA is an effective and safe option for treating low-risk PTMC patients who are of high surgical risk or refuse surgery. PMID: 31854153 [PubMed - in process] (Source: Korean Journal of Radiology)
Source: Korean Journal of Radiology - December 20, 2019 Category: Radiology Tags: Korean J Radiol Source Type: research

Guidelines for Cardiovascular Magnetic Resonance Imaging from the Korean Society of Cardiovascular Imaging-Part 2: Interpretation of Cine, Flow, and Angiography Data.
Authors: Lee JW, Hur JH, Yang DH, Lee BY, Im DJ, Hong SJ, Kim EY, Park EA, Jo Y, Kim J, Park CH, Yong HS Abstract Cardiovascular magnetic resonance imaging (CMR) is expected to be increasingly used in Korea due to technological advances and the expanded national insurance coverage of CMR assessments. For improved patient care, proper acquisition of CMR images as well as their accurate interpretation by well-trained personnel are equally important. In response to the increased demand for CMR, the Korean Society of Cardiovascular Imaging (KOSCI) has issued interpretation guidelines in conjunction with the Korean Soci...
Source: Korean Journal of Radiology - October 14, 2019 Category: Radiology Tags: Korean J Radiol Source Type: research

Coronary-to-Pulmonary Artery Fistula in Adults: Natural History and Management Strategies.
CONCLUSION: Most CPAFs identified on CCTA have a favorable prognosis. Observation with OMT is usually an appropriate strategy. Fistula size is a possible determinant for surgical treatment. PMID: 31606954 [PubMed - in process] (Source: Korean Journal of Radiology)
Source: Korean Journal of Radiology - October 14, 2019 Category: Radiology Tags: Korean J Radiol Source Type: research

Planting Seeds into the Lung: Image-Guided Percutaneous Localization to Guide Minimally Invasive Thoracic Surgery.
Authors: Lee JW, Park CH, Lee SM, Jeong M, Hur J Abstract Image-guided localization materials are constantly evolving, providing options for the localization of small pulmonary nodules to guide minimally invasive thoracic surgery. Several preoperative methods have been developed to localize small pulmonary lesions prior to video-assisted thoracic surgery. These localization techniques can be categorized into 4 groups according to the materials used: localization with metallic materials (hook-wire, microcoil, or spiral coil), localization with dye (methylene blue or indigo carmine), localization with contrast agents...
Source: Korean Journal of Radiology - October 14, 2019 Category: Radiology Tags: Korean J Radiol Source Type: research

Non-Diagnostic CT-Guided Percutaneous Needle Biopsy of the Lung: Predictive Factors and Final Diagnoses.
CONCLUSION: The predictive factors for a non-diagnostic biopsy were lesion size ≤ 15 mm, needle tract traversing emphysema, introducer needle outside the lesion, procedure time> 60 minutes, and presence of alveolar hemorrhage. Thirty-six percent of the non-diagnostic biopsies yielded a malignant diagnosis. In cases with a history of malignancy or the presence of atypical cells in the biopsy sample, a repeat biopsy or surgical intervention should be considered. PMID: 31606956 [PubMed - in process] (Source: Korean Journal of Radiology)
Source: Korean Journal of Radiology - October 14, 2019 Category: Radiology Tags: Korean J Radiol Source Type: research

Validation of a New Point Shear-Wave Elastography Method for Noninvasive Assessment of Liver Fibrosis: A Prospective Multicenter Study.
Authors: Joo I, Kim SY, Park HS, Lee ES, Kang HJ, Lee JM Abstract OBJECTIVE: To validate the diagnostic value of a new point shear-wave elastography method, S-shearwave elastography (S-SWE; Samsung Medison Co., Ltd.), in noninvasive assessment of liver fibrosis. MATERIALS AND METHODS: In this prospective multicenter study, liver stiffness (LS) measurements for 600 participants were obtained with both S-SWE and transient elastography (TE). The rates of unsuccessful LS measurements in S-SWE and TE were compared, and correlations between S-SWE and TE measurements were assessed. In 107 patients with histologic refe...
Source: Korean Journal of Radiology - October 14, 2019 Category: Radiology Tags: Korean J Radiol Source Type: research

Altered Functional Brain Networks in Patients with Traumatic Anosmia: Resting-State Functional MRI Based on Graph Theoretical Analysis.
Authors: Park M, Chung J, Kim JK, Jeong Y, Moon WJ Abstract OBJECTIVE: Traumatic anosmia is a common disorder following head injury; however, little is known regarding its neural basis and influence on the functional networks. Therefore, we aimed to investigate the functional connectivity changes in patients with traumatic anosmia compared to healthy controls using resting-state functional magnetic resonance imaging (rs-fMRI). MATERIALS AND METHODS: Sixteen patients with traumatic anosmia and 12 healthy controls underwent rs-fMRI. Differences in the connectivity of the olfactory and whole brain networks were co...
Source: Korean Journal of Radiology - October 14, 2019 Category: Radiology Tags: Korean J Radiol Source Type: research

Symptomatic Retinal Artery Occlusion after Angioplasty and Stenting of the Carotid Artery: Incidence and Related Risk Factors.
CONCLUSION: In procedures performed using ICA distal filtering CPD systems, RAO as a complication of CAS (performed for severe stenosis) showed a relationship to ECA-supplied OA. For older patients, simultaneous use of ICA-ECA CPDs might help prevent such complications. PMID: 31606959 [PubMed - in process] (Source: Korean Journal of Radiology)
Source: Korean Journal of Radiology - October 14, 2019 Category: Radiology Tags: Korean J Radiol Source Type: research

Ultrasound Feature-Based Diagnostic Model Focusing on the "Submarine Sign" for Epidermal Cysts among Superficial Soft Tissue Lesions.
Ultrasound Feature-Based Diagnostic Model Focusing on the "Submarine Sign" for Epidermal Cysts among Superficial Soft Tissue Lesions. Korean J Radiol. 2019 Oct;20(10):1409-1421 Authors: Lee DH, Yoon CS, Lim BJ, Lee HS, Kim S, Choi AL, Kim S Abstract OBJECTIVE: To develop a diagnostic model for superficial soft tissue lesions to differentiate epidermal cyst (EC) from other lesions based on ultrasound (US) features. MATERIALS AND METHODS: This retrospective study included 205 patients who had undergone US examinations for superficial soft tissue lesions and subsequent surgical excision. The...
Source: Korean Journal of Radiology - September 24, 2019 Category: Radiology Tags: Korean J Radiol Source Type: research

Computed Tomography Pulmonary Vascular Volume Ratio Can Be Used to Evaluate the Effectiveness of Pulmonary Angioplasty in Peripheral Pulmonary Artery Stenosis.
Authors: Goo HW Abstract OBJECTIVE: To explore whether computed tomography (CT) pulmonary vascular volume ratio can be used to evaluate the effectiveness of pulmonary artery angioplasty in patients with peripheral pulmonary artery stenosis. MATERIALS AND METHODS: Changes in CT pulmonary vascular volume ratio between serial cardiothoracic CT examinations were calculated in 38 patients. Fifteen patients underwent interim pulmonary artery angioplasty (group 1), while 23 did not (group 2). According to the effectiveness of pulmonary artery angioplasty, patients in group 1 were further divided into group 1A (improve...
Source: Korean Journal of Radiology - September 24, 2019 Category: Radiology Tags: Korean J Radiol Source Type: research

Deep Learning Algorithm for Reducing CT Slice Thickness: Effect on Reproducibility of Radiomic Features in Lung Cancer.
Authors: Park S, Lee SM, Do KH, Lee JG, Bae W, Park H, Jung KH, Seo JB Abstract OBJECTIVE: To retrospectively assess the effect of CT slice thickness on the reproducibility of radiomic features (RFs) of lung cancer, and to investigate whether convolutional neural network (CNN)-based super-resolution (SR) algorithms can improve the reproducibility of RFs obtained from images with different slice thicknesses. MATERIALS AND METHODS: CT images with 1-, 3-, and 5-mm slice thicknesses obtained from 100 pathologically proven lung cancers between July 2017 and December 2017 were evaluated. CNN-based SR algorithms using...
Source: Korean Journal of Radiology - September 24, 2019 Category: Radiology Tags: Korean J Radiol Source Type: research

Imaging of Thoracic Wall Abnormalities.
Authors: Semionov A, Kosiuk J, Ajlan A, Discepola F Abstract Identification of certain abnormalities of the chest wall can be extremely helpful in correctly diagnosing a number of syndromic conditions and systemic diseases. Additionally, chest wall abnormalities may sometimes constitute diagnoses by themselves. In the present pictorial essay, we review a number of such conditions and provide illustrative cases that were retrospectively identified from our clinical imaging database. These include pentalogy of Cantrell, Klippel-Feil syndrome, cleidocranial dysplasia, Poland syndrome, osteopetrosis, neurofibromatosis ...
Source: Korean Journal of Radiology - September 24, 2019 Category: Radiology Tags: Korean J Radiol Source Type: research

Ultrasound-Guided Core Needle Biopsy Techniques for Intermediate or Low Suspicion Thyroid Nodules: Which Method is Effective for Diagnosis?
CONCLUSION: For intermediate or low suspicion thyroid nodules, US-guided CNB to obtain two specimens with marginal targets is more effective for diagnosing neoplasm or malignancy than is CNB for respective marginal and intranodular targets. PMID: 31544370 [PubMed - in process] (Source: Korean Journal of Radiology)
Source: Korean Journal of Radiology - September 24, 2019 Category: Radiology Tags: Korean J Radiol Source Type: research

Uterine Artery Embolization for Leiomyomas and Adenomyosis: A Pictorial Essay Based on Our Experience from 1300 Cases.
Authors: Kim MD Abstract Since its introduction in 1995, uterine artery embolization (UAE) has become an established option for the treatment of leiomyomas. Identification of a leiomyoma using arteriography improves the ability to perform effective UAE. UAE is not contraindicated in a pedunculated subserosal leiomyoma. UAE in a cervical leiomyoma remains a challenging procedure. A leiomyoma with high signal intensity on T2-weighted imaging responds well to UAE, but a malignancy with similar radiological features should not be misdiagnosed as a leiomyoma. Administration of gonadotropin-releasing hormone agonists bef...
Source: Korean Journal of Radiology - September 24, 2019 Category: Radiology Tags: Korean J Radiol Source Type: research

The "Lip Sign" in MRI of the Spinal Cord.
The "Lip Sign" in MRI of the Spinal Cord. Korean J Radiol. 2019 Oct;20(10):1474-1475 Authors: Tarafdar S, Mohan A, Nagarajan K PMID: 31544372 [PubMed - in process] (Source: Korean Journal of Radiology)
Source: Korean Journal of Radiology - September 24, 2019 Category: Radiology Tags: Korean J Radiol Source Type: research

Endovascular Aneurysm Repair for Abdominal Aortic Aneurysm: A Comprehensive Review.
Authors: Kim HO, Yim NY, Kim JK, Kang YJ, Lee BC Abstract Abdominal aortic aneurysm (AAA) can be defined as an abnormal, progressive dilatation of the abdominal aorta, carrying a substantial risk for fatal aneurysmal rupture. Endovascular aneurysmal repair (EVAR) for AAA is a minimally invasive endovascular procedure that involves the placement of a bifurcated or tubular stent-graft over the AAA to exclude the aneurysm from arterial circulation. In contrast to open surgical repair, EVAR only requires a stab incision, shorter procedure time, and early recovery. Although EVAR seems to be an attractive solution with m...
Source: Korean Journal of Radiology - July 25, 2019 Category: Radiology Tags: Korean J Radiol Source Type: research

Prognostic Value of Radiologic Extranodal Extension in Human Papillomavirus-Related Oropharyngeal Squamous Cell Carcinoma.
CONCLUSION: Radiologic ENE on CT or MRI did not predict poor PFS in patients with HPV-related OPSCC, although there was a trend towards worse PFS. Further studies are warranted to determine whether radiologic ENE is a useful imaging biomarker to risk-stratify patients with HPV-related OPSCC. PMID: 31339014 [PubMed - in process] (Source: Korean Journal of Radiology)
Source: Korean Journal of Radiology - July 25, 2019 Category: Radiology Tags: Korean J Radiol Source Type: research

Fully Automatic Segmentation of Acute Ischemic Lesions on Diffusion-Weighted Imaging Using Convolutional Neural Networks: Comparison with Conventional Algorithms.
Authors: Woo I, Lee A, Jung SC, Lee H, Kim N, Cho SJ, Kim D, Lee J, Sunwoo L, Kang DW Abstract OBJECTIVE: To develop algorithms using convolutional neural networks (CNNs) for automatic segmentation of acute ischemic lesions on diffusion-weighted imaging (DWI) and compare them with conventional algorithms, including a thresholding-based segmentation. MATERIALS AND METHODS: Between September 2005 and August 2015, 429 patients presenting with acute cerebral ischemia (training:validation:test set = 246:89:94) were retrospectively enrolled in this study, which was performed under Institutional Review Board approval....
Source: Korean Journal of Radiology - July 25, 2019 Category: Radiology Tags: Korean J Radiol Source Type: research

Coil-Protected Technique for Liquid Embolization in Neurovascular Malformations.
CONCLUSION: The coil-protected technique is a safe and effective method for liquid embolization, especially in patients with various neurovascular shunts or malformations who could not be successfully treated with conventional techniques. PMID: 31339016 [PubMed - in process] (Source: Korean Journal of Radiology)
Source: Korean Journal of Radiology - July 25, 2019 Category: Radiology Tags: Korean J Radiol Source Type: research

Diagnostic Performance of ¹⁸F-Fluorodeoxyglucose Positron Emission Tomography/CT for Chronic Empyema-Associated Malignancy.
Diagnostic Performance of ¹⁸F-Fluorodeoxyglucose Positron Emission Tomography/CT for Chronic Empyema-Associated Malignancy. Korean J Radiol. 2019 Aug;20(8):1293-1299 Authors: Cheon M, Yoo J, Hyun SH, Lee KS, Kim H, Kim J, Zo J, Shim YM, Choi JY Abstract OBJECTIVE: The purpose of this study was to evaluate the diagnostic performance of ¹⁸F-fluorodeoxyglucose positron emission tomography/computed tomography (¹⁸F-FDG PET/CT) for chronic empyema-associated malignancy (CEAM). MATERIALS AND METHODS: We retrospectively reviewed the ¹⁸F-FDG PET/CT images of 33 patients with chro...
Source: Korean Journal of Radiology - July 25, 2019 Category: Radiology Tags: Korean J Radiol Source Type: research

Diagnostic Accuracy of Percutaneous Transthoracic Needle Lung Biopsies: A Multicenter Study.
CONCLUSION: The accuracy of PTNB for diagnosis of malignancy was fairly high in our large-scale multi-institutional cohort. The identified risk factors for diagnostic failure may help reduce diagnostic failure and interpret the biopsy results. PMID: 31339018 [PubMed - in process] (Source: Korean Journal of Radiology)
Source: Korean Journal of Radiology - July 25, 2019 Category: Radiology Tags: Korean J Radiol Source Type: research

Reply: Prediction of the Left Ventricular Functional Outcome by Myocardial Extracellular Volume Fraction Measured Using Magnetic Resonance Imaging; Methodological Issue.
Authors: Chen Y, Zeng M PMID: 31339019 [PubMed - in process] (Source: Korean Journal of Radiology)
Source: Korean Journal of Radiology - July 25, 2019 Category: Radiology Tags: Korean J Radiol Source Type: research

Response Assessment with MRI after Chemoradiotherapy in Rectal Cancer: Current Evidences.
Authors: Seo N, Kim H, Cho MS, Lim JS Abstract Baseline magnetic resonance imaging (MRI) has become the primary staging modality for surgical plans and stratification of patient populations for more efficient neoadjuvant treatment. Patients who exhibit a complete response to chemoradiotherapy (CRT) may achieve excellent local tumor control and better quality of life with organ-preserving treatments such as local excision or even watch-and-wait management. Therefore, the evaluation of tumor response is a key factor for determining the appropriate treatment following CRT. Although post-CRT MRI is generally accepted a...
Source: Korean Journal of Radiology - July 5, 2019 Category: Radiology Tags: Korean J Radiol Source Type: research

Atypical Appearance of Hepatocellular Carcinoma and Its Mimickers: How to Solve Challenging Cases Using Gadoxetic Acid-Enhanced Liver Magnetic Resonance Imaging.
Authors: Kim JH, Joo I, Lee JM Abstract Hepatocellular carcinoma (HCC) can be diagnosed noninvasively with contrast-enhanced dynamic computed tomography, magnetic resonance imaging, or ultrasonography on the basis of its hallmark imaging features of arterial phase hyperenhancement and washout on portal or delayed phase images. However, approximately 40% of HCCs show atypical imaging features, posing a significant diagnostic challenge for radiologists. Another challenge for radiologists in clinical practice is the presentation of many HCC mimickers such as intrahepatic cholangiocarcinoma, combined HCC-cholangiocarci...
Source: Korean Journal of Radiology - July 5, 2019 Category: Radiology Tags: Korean J Radiol Source Type: research

2018 Korean Liver Cancer Association-National Cancer Center Korea Practice Guidelines for the Management of Hepatocellular Carcinoma.
Authors: Korean Liver Cancer Association (KLCA), National Cancer Center (NCC), Goyang, Korea Abstract Hepatocellular carcinoma (HCC) is the fifth most common cancer globally and the fourth most common cancer in men in Korea, where the prevalence of chronic hepatitis B infection is high in middle-aged and elderly patients. These practice guidelines will provide useful and constructive advice for the clinical management of patients with HCC. A total of 44 experts in hepatology, oncology, surgery, radiology, and radiation oncology in the Korean Liver Cancer Association-National Cancer Center Korea Practice Guideline R...
Source: Korean Journal of Radiology - July 5, 2019 Category: Radiology Tags: Korean J Radiol Source Type: research

Microvascular Flow Imaging of Residual or Recurrent Hepatocellular Carcinoma after Transarterial Chemoembolization: Comparison with Color/Power Doppler Imaging.
CONCLUSION: MVFI demonstrated significantly higher sensitivity and accuracy than did CDI and PDI for the detection of intratumoral vascularity in suspected residual or recurrent HCCs after TACE. PMID: 31270975 [PubMed - in process] (Source: Korean Journal of Radiology)
Source: Korean Journal of Radiology - July 5, 2019 Category: Radiology Tags: Korean J Radiol Source Type: research

Reproducibility and Generalizability in Radiomics Modeling: Possible Strategies in Radiologic and Statistical Perspectives.
Authors: Park JE, Park SY, Kim HJ, Kim HS Abstract Radiomics, which involves the use of high-dimensional quantitative imaging features for predictive purposes, is a powerful tool for developing and testing medical hypotheses. Radiologic and statistical challenges in radiomics include those related to the reproducibility of imaging data, control of overfitting due to high dimensionality, and the generalizability of modeling. The aims of this review article are to clarify the distinctions between radiomics features and other omics and imaging data, to describe the challenges and potential strategies in reproducibilit...
Source: Korean Journal of Radiology - July 5, 2019 Category: Radiology Tags: Korean J Radiol Source Type: research

Analysis of Apparent Diffusion Coefficients of the Brain in Healthy Controls: A Comparison Study between Single-Shot Echo-Planar Imaging and Read-out-Segmented Echo-Planar Imaging.
Authors: Choi Y, Hwang EJ, Nam Y, Choi HS, Jang J, Jung SL, Ahn KJ, Kim BS Abstract OBJECTIVE: To compare apparent diffusion coefficients (ADCs) of brain segments by using two diffusion-weighted imaging acquisition modes, single-shot echo-planar imaging (ss-EPI) and read-out-segmented echo-planar imaging (rs-EPI), and to assess their correlation and agreement in healthy controls. MATERIALS AND METHODS: T2-weighted (T2W) images, rs-EPI, and ss-EPI of 30 healthy subjects were acquired using a 3T magnetic resonance scanner. The T2W images were co-registered to the rs-EPI and ss-EPI, which were then segmented into ...
Source: Korean Journal of Radiology - July 5, 2019 Category: Radiology Tags: Korean J Radiol Source Type: research

Modified Subtraction Coronary CT Angiography with a Two-Breathhold Technique: Image Quality and Diagnostic Accuracy in Patients with Coronary Calcifications.
Authors: Guo W, Tripathi P, Yang S, Qian J, Rai B, Zeng M Abstract OBJECTIVE: To evaluate a modified subtraction coronary computed tomography angiography (CCTA) technique with a two-breathhold approach in terms of image quality and stenosis grading of calcified coronary segments and in the detection of significant coronary stenosis in segments with severe calcification. MATERIALS AND METHODS: The institutional board approved this study, and all subjects provided written consent. A total of 128 patients were recruited into this trial, of which 32 underwent subtraction CCTA scans and invasive coronary angiography...
Source: Korean Journal of Radiology - July 5, 2019 Category: Radiology Tags: Korean J Radiol Source Type: research

Subclinical Coronary Atherosclerosis: Implication of Coronary Computed Tomography Angiography Findings among Statin Candidates according to the 2013 ACC/AHA Cholesterol Management Guidelines.
Authors: Seo J, Choi SI, Kim YK Abstract OBJECTIVE: To analyze the cardiovascular outcome of statin medication in individuals retrospectively categorized on the basis of the 2013 American College of Cardiology and American Heart Association (ACC/AHA) guidelines risk assessment and to determine the additional prognostic value of coronary computed tomography angiography (CCTA) in assessing cardiovascular disease (CVD) risk in this group. MATERIALS AND METHODS: This retrospective study reviewed 4255 asymptomatic individuals who had undergone self-referred CCTA with a median follow-up period of 87 months. The prima...
Source: Korean Journal of Radiology - July 5, 2019 Category: Radiology Tags: Korean J Radiol Source Type: research

Image Quality and Radiation Dose in CT Venography Using Model-Based Iterative Reconstruction at 80 kVp versus Adaptive Statistical Iterative Reconstruction-V at 70 kVp.
Authors: Park C, Choo KS, Kim JH, Nam KJ, Lee JW, Kim JY Abstract OBJECTIVE: To compare the objective and subjective image quality indicators and radiation doses of computed tomography (CT) venography performed using model-based iterative reconstruction (MBIR) at 80 kVp and adaptive statistical iterative reconstruction (ASIR)-V at 70 kVp. MATERIALS AND METHODS: Eighty-three patients who had undergone CT venography of the lower extremities with MBIR at 80 kVp (Group A; 21 men and 20 women; mean age, 55.5 years) or ASIR-V at 70 kVp (Group B; 18 men and 24 women; mean age, 57.3 years) were enrolled. Two radiologis...
Source: Korean Journal of Radiology - July 5, 2019 Category: Radiology Tags: Korean J Radiol Source Type: research

Shear-Wave and Strain Ultrasound Elastography of the Supraspinatus and Infraspinatus Tendons in Patients with Idiopathic Adhesive Capsulitis of the Shoulder: A Prospective Case-Control Study.
CONCLUSION: SWE and SE indicated that SST and IST were stiffer in patients with ACS than in those with normal shoulders regardless of aging. PMID: 31270981 [PubMed - in process] (Source: Korean Journal of Radiology)
Source: Korean Journal of Radiology - July 5, 2019 Category: Radiology Tags: Korean J Radiol Source Type: research

Magnetic Resonance Imaging Assessment of Blood Flow Distribution in Fenestrated and Completed Fontan Circulation with Special Emphasis on Abdominal Blood Flow.
Authors: Caro-Dominguez P, Chaturvedi R, Chavhan G, Ling SC, Yim D, Porayette P, Lam CZ, Kim TK, Seed M, Grosse-Wortmann L, Yoo SJ Abstract OBJECTIVE: To investigate the regional flow distribution in patients with Fontan circulation by using magnetic resonance imaging (MRI). MATERIALS AND METHODS: We identified 39 children (18 females and 21 males; mean age, 9.3 years; age range, 3.3-17.0 years) with Fontan circulation in whom flow volumes across the thoracic and abdominal arteries and veins were measured by using MRI. The patients were divided into three groups: fenestrated Fontan circulation group with MRI pe...
Source: Korean Journal of Radiology - July 5, 2019 Category: Radiology Tags: Korean J Radiol Source Type: research

Accuracy of Model-Based Iterative Reconstruction for CT Volumetry of Part-Solid Nodules and Solid Nodules in Comparison with Filtered Back Projection and Hybrid Iterative Reconstruction at Various Dose Settings: An Anthropomorphic Chest Phantom Study.
Authors: Kim SK, Kim C, Lee KY, Cha J, Lim HJ, Kang EY, Oh YW Abstract OBJECTIVE: To investigate the accuracy of model-based iterative reconstruction (MIR) for volume measurement of part-solid nodules (PSNs) and solid nodules (SNs) in comparison with filtered back projection (FBP) or hybrid iterative reconstruction (HIR) at various radiation dose settings. MATERIALS AND METHODS: CT scanning was performed for eight different diameters of PSNs and SNs placed in the phantom at five radiation dose levels (120 kVp/100 mAs, 120 kVp/50 mAs, 120 kVp/20 mAs, 120 kVp/10 mAs, and 80 kVp/10 mAs). Each CT scan was reconstru...
Source: Korean Journal of Radiology - July 5, 2019 Category: Radiology Tags: Korean J Radiol Source Type: research

CT Evaluation for Clinical Lung Cancer Staging: Do Multiplanar Measurements Better Reflect Pathologic T-Stage than Axial Measurements?
Authors: Park S, Lee SM, Choe J, Lee JG, Lee SM, Do KH, Seo JB Abstract OBJECTIVE: To retrospectively investigate whether tumor size assessment on multiplanar reconstruction (MPR) CT images better reflects pathologic T-stage than evaluation on axial images and evaluate the additional value of measurement in three-dimensional (3D) space. MATERIALS AND METHODS: From 1661 patients who had undergone surgical resection for primary lung cancer between June 2013 and November 2016, 210 patients (145 men; mean age, 64.4 years) were randomly selected and 30 were assigned to each pathologic T-stage. Two readers independen...
Source: Korean Journal of Radiology - July 5, 2019 Category: Radiology Tags: Korean J Radiol Source Type: research

Clinical Utility of Quantitative CT Analysis for Fissure Completeness in Bronchoscopic Lung Volume Reduction: Comparison between CT and Chartis ™.
CONCLUSION: The quantitative analysis of fissure shows that incomplete fissures increased the probability of CV on Chartis™, while the defect size did not affect the overall rates. TLVR could be achieved even in some patients with relatively large fissure defect, if they showed negative CV on Chartis™. PMID: 31270985 [PubMed - in process] (Source: Korean Journal of Radiology)
Source: Korean Journal of Radiology - July 5, 2019 Category: Radiology Tags: Korean J Radiol Source Type: research

Human Bocavirus Infection in Adults: Clinical Features and Radiological Findings.
CONCLUSION: HBoV infection can be a potential respiratory tract infection in adults. The most frequent CT findings of HBoV pneumonia were bilateral consolidation and/or ground-glass opacities. PMID: 31270986 [PubMed - in process] (Source: Korean Journal of Radiology)
Source: Korean Journal of Radiology - July 5, 2019 Category: Radiology Tags: Korean J Radiol Source Type: research

Structural and Functional Features on Quantitative Chest Computed Tomography in the Korean Asian versus the White American Healthy Non-Smokers.
This study aimed to investigate unique features of airway structure and lung function based on quantitative computed tomography (QCT)-imaging metrics in the Korean Asian population (Koreans) as compared with the White American population (Whites). MATERIALS AND METHODS: QCT data of healthy non-smokers (223 Koreans vs. 70 Whites) were collected, including QCT structural variables of wall thickness (WT) and hydraulic diameter (Dh) and functional variables of air volume, total air volume change in the lung (ΔVair), percent emphysema-like lung (Emph%), and percent functional small airway disease-like lung (fSAD%). Ma...
Source: Korean Journal of Radiology - July 5, 2019 Category: Radiology Tags: Korean J Radiol Source Type: research

Emerging Role of Hepatobiliary Magnetic Resonance Contrast Media and Contrast-Enhanced Ultrasound for Noninvasive Diagnosis of Hepatocellular Carcinoma: Emphasis on Recent Updates in Major Guidelines.
Authors: Kim TH, Yoon JH, Lee JM Abstract Hepatocellular carcinoma (HCC) can be noninvasively diagnosed on the basis of its characteristic imaging findings of arterial phase enhancement and portal/delayed "washout" on computed tomography (CT) and magnetic resonance imaging (MRI) in cirrhotic patients. However, different specific diagnostic criteria have been proposed by several countries and major academic societies. In 2018, major guideline updates were proposed by the Association for the Study of Liver Diseases, European Association for the Study of the Liver (EASL), Korean Liver Cancer Association and ...
Source: Korean Journal of Radiology - May 29, 2019 Category: Radiology Tags: Korean J Radiol Source Type: research

Technical Performance of Two-Dimensional Shear Wave Elastography for Measuring Liver Stiffness: A Systematic Review and Meta-Analysis.
CONCLUSION: 2D-SWE shows good technical performance for assessing liver stiffness, with high technical success and reliability. Future studies should establish the quality criteria and optimal number of measurements. PMID: 31132814 [PubMed - in process] (Source: Korean Journal of Radiology)
Source: Korean Journal of Radiology - May 29, 2019 Category: Radiology Tags: Korean J Radiol Source Type: research