Survival Rates of Breast Cancer Patients Aged 40 to 49 Years according to Detection Modality in Korea: Screening Ultrasound versus Mammography.
CONCLUSION: Our study found that Korean females aged 40-49 years with US-detected breast cancer showed better DFS than those with mammography-detected breast cancer. However, there were no statistically significant differences in OS. PMID: 32901456 [PubMed - as supplied by publisher] (Source: Korean Journal of Radiology)
Source: Korean Journal of Radiology - September 11, 2020 Category: Radiology Tags: Korean J Radiol Source Type: research

Radiologic Evaluation and Structured Reporting Form for Extrahepatic Bile Duct Cancer: 2019 Consensus Recommendations from the Korean Society of Abdominal Radiology.
Authors: Lee DH, Kim B, Lee ES, Kim HJ, Min JH, Lee JM, Choi MH, Seo N, Choi SH, Kim SH, Lee SS, Park YS, Chung YE, Korean Society of Abdominal Radiology Abstract Radiologic imaging is important for evaluating extrahepatic bile duct (EHD) cancers; it is used for staging tumors and evaluating the suitability of surgical resection, as surgery may be contraindicated in some cases regardless of tumor stage. However, the published general recommendations for EHD cancer and recommendations guided by the perspectives of radiologists are limited. The Korean Society of Abdominal Radiology (KSAR) study group for EHD cancer d...
Source: Korean Journal of Radiology - September 11, 2020 Category: Radiology Tags: Korean J Radiol Source Type: research

The Role of Imaging in Current Treatment Strategies for Pancreatic Adenocarcinoma.
Authors: Rhee H, Park MS Abstract In pancreatic cancer, imaging plays an essential role in surveillance, diagnosis, resectability evaluation, and treatment response evaluation. Pancreatic cancer surveillance in high-risk individuals has been attempted using endoscopic ultrasound (EUS) or magnetic resonance imaging (MRI). Imaging diagnosis and resectability evaluation are the most important factors influencing treatment decisions, where computed tomography (CT) is the preferred modality. EUS, MRI, and positron emission tomography play a complementary role to CT. Treatment response evaluation is of increasing clinica...
Source: Korean Journal of Radiology - September 11, 2020 Category: Radiology Tags: Korean J Radiol Source Type: research

Diffusion-Weighted Imaging for Differentiation of Biliary Atresia and Grading of Hepatic Fibrosis in Infants with Cholestasis.
Authors: Kim J, Shin HJ, Yoon H, Han SJ, Koh H, Kim MJ, Lee MJ Abstract OBJECTIVE: To determine whether the values of hepatic apparent diffusion coefficient (ADC) can differentiate biliary atresia (BA) from non-BA or be correlated with the grade of hepatic fibrosis in infants with cholestasis. MATERIALS AND METHODS: This retrospective cohort study included infants who received liver MRI examinations to evaluate cholestasis from July 2009 to October 2017. Liver ADC, ADC ratio of liver/spleen, aspartate aminotransferase to platelet ratio index (APRI), and spleen size were compared between the BA and non-BA groups...
Source: Korean Journal of Radiology - September 11, 2020 Category: Radiology Tags: Korean J Radiol Source Type: research

Glue Embolization of Lymphopseudoaneurysm for Chylous Ascites after Retroperitoneal Surgery.
CONCLUSION: Glue embolization of LPA has the potential to be a feasible and effective treatment method for the management of chylous ascites after retroperitoneal surgery. PMID: 32901460 [PubMed - as supplied by publisher] (Source: Korean Journal of Radiology)
Source: Korean Journal of Radiology - September 11, 2020 Category: Radiology Tags: Korean J Radiol Source Type: research

Diffusion-Weighted Magnetic Resonance Imaging of the Breast: Standardization of Image Acquisition and Interpretation.
Authors: Lee SH, Shin HJ, Moon WK Abstract Diffusion-weighted (DW) magnetic resonance imaging (MRI) is a rapid, unenhanced imaging technique that measures the motion of water molecules within tissues and provides information regarding the cell density and tissue microstructure. DW MRI has demonstrated the potential to improve the specificity of breast MRI, facilitate the evaluation of tumor response to neoadjuvant chemotherapy and can be employed in unenhanced MRI screening. However, standardization of the acquisition and interpretation of DW MRI is challenging. Recently, the European Society of Breast Radiology is...
Source: Korean Journal of Radiology - September 11, 2020 Category: Radiology Tags: Korean J Radiol Source Type: research

Transiting Nerve Rootlet Abnormalities on MRI after Lumbar Laminectomy: Associations with Persistent Postoperative Pain.
CONCLUSION: On MRI, PPP was associated with transiting nerve rootlet abnormalities, including thickening, signal alterations, and ill-distinction, but was not associated with epidural fibrosis or intrathecal arachnoiditis. The most relevant findings were the nerve rootlet thickening and signal alteration. PMID: 32901462 [PubMed - as supplied by publisher] (Source: Korean Journal of Radiology)
Source: Korean Journal of Radiology - September 11, 2020 Category: Radiology Tags: Korean J Radiol Source Type: research

Update on Transradial Access for Percutaneous Transcatheter Visceral Artery Embolization.
Authors: Chu HH, Kim JW, Shin JH, Cho SB Abstract Transfemoral access (TFA) is a widely used first-line approach for most peripheral vascular interventions. Since its introduction in cardiologic and neurointerventional procedures, several advantages of transradial access (TRA) over TFA have been demonstrated, such as patient preference, lower complication rates, early ambulation, and shorter hospital stay. However, studies reporting the safety and efficacy of this approach for peripheral vascular interventions performed by interventional radiologists are relatively few. This review aimed to summarize the technique ...
Source: Korean Journal of Radiology - September 11, 2020 Category: Radiology Tags: Korean J Radiol Source Type: research

Imaging Predictors of Survival in Patients with Single Small Hepatocellular Carcinoma Treated with Transarterial Chemoembolization.
Authors: Park C, Kim JH, Kim PH, Kim SY, Gwon DI, Chu HH, Park M, Hur J, Kim JY, Kim DJ Abstract OBJECTIVE: Clinical outcomes of patients who undergo transarterial chemoembolization (TACE) for single small hepatocellular carcinoma (HCC) are not consistent, and may differ based on certain imaging findings. This retrospective study was aimed at determining the efficacy of pre-TACE CT or MR imaging findings in predicting survival outcomes in patients with small HCC upon being treated with TACE. Besides, the study proposed to build a risk prediction model for these patients. MATERIALS AND METHODS: Altogether, 750 p...
Source: Korean Journal of Radiology - September 11, 2020 Category: Radiology Tags: Korean J Radiol Source Type: research

Incidence and Risk Factors of Nausea and Vomiting after Exposure to Low-Osmolality Iodinated Contrast Media in Children: A Focus on Preparative Fasting.
CONCLUSION: Only a small proportion (2.1%) of children experienced nausea or vomiting after exposure to low-osmolality ICM. Many children underwent excessive fasting; however, fasting duration was not associated with nausea and vomiting. Moreover, ongoing chemotherapy and the use of iomeprol or iohexol were identified as potential risk factors for emetic complications in children. PMID: 32767861 [PubMed - as supplied by publisher] (Source: Korean Journal of Radiology)
Source: Korean Journal of Radiology - August 13, 2020 Category: Radiology Tags: Korean J Radiol Source Type: research

Diagnostic Performance and Prognostic Relevance of FDG Positron Emission Tomography/Computed Tomography for Patients with Extrahepatic Cholangiocarcinoma.
This study included 234 extrahepatic cholangiocarcinoma patients who underwent FDG PET-CT between June 2008 and February 2016. The diagnostic performance of FDG PEG-CT was compared to that of contrast-enhanced multi-detector row CT (MDCT) and MRI. Independent prognosticators for poor survival were also assessed. RESULTS: The sensitivity of FDG PET-CT for detecting primary tumor and regional lymph node metastases was lower than that of MDCT or MRI (p
Source: Korean Journal of Radiology - August 13, 2020 Category: Radiology Tags: Korean J Radiol Source Type: research

The Effects of a Vasodilator on Transluminal Attenuation Gradient at Coronary Computed Tomography Angiography.
Authors: Kim MS, Kang EJ, Kim HJ, Kim MH, Lee KN Abstract OBJECTIVE: To evaluate the effects of vasodilators on contrast enhancement and transluminal attenuation gradient (TAG) of coronary arteries at coronary computed tomography angiography (CCTA). MATERIALS AND METHODS: We retrospectively reviewed CCTA scans of patients who underwent double-acquisition CCTA; CCTA without a vasodilator, and CCTA during a intravenous (IV) infusion of nitrate. Among them, we enrolled 19 patients who had no significant atherosclerotic lesions or coronary spasms. In the control group, 28 patients were enrolled who showed normal co...
Source: Korean Journal of Radiology - August 13, 2020 Category: Radiology Tags: Korean J Radiol Source Type: research

Minimally Invasive Treatment for Benign Parathyroid Lesions: Treatment Efficacy and Safety Based on Nodule Characteristics.
This study aimed to evaluate the efficacy and safety of ultrasound (US)-guided minimally invasive treatment in patients with parathyroid lesions. MATERIALS AND METHODS: This study included 27 patients who had undergone US-guided radiofrequency ablation (RFA) or ethanol ablation (EA) for parathyroid lesions between January 2010 and 2018. RFA was performed in 19 patients with primary hyperparathyroidism (PHPT, n = 11) or secondary hyperparathyroidism (SHPT, n = 8), and EA was performed in eight patients with symptomatic nonfunctioning parathyroid cysts (SNPCs). Nodule size, volume, serum parathyroid hormone (PTH) and cal...
Source: Korean Journal of Radiology - August 13, 2020 Category: Radiology Tags: Korean J Radiol Source Type: research

Contrast-Enhanced High-Resolution Intracranial Vessel Wall MRI with Compressed Sensing: Comparison with Conventional T1 Volumetric Isotropic Turbo Spin Echo Acquisition Sequence.
CONCLUSION: CS may be useful for intracranial VW-MRI as it allows for larger scan coverage with slightly shorter scan time without compromising image quality. PMID: 32767865 [PubMed - as supplied by publisher] (Source: Korean Journal of Radiology)
Source: Korean Journal of Radiology - August 13, 2020 Category: Radiology Tags: Korean J Radiol Source Type: research

Noninvasive Imaging for the Evaluation of Non-Alcoholic Fatty Liver Disease Spectrum.
Authors: Liu Q, Nie H, Xu H, Wang P, Lei P PMID: 32767866 [PubMed - as supplied by publisher] (Source: Korean Journal of Radiology)
Source: Korean Journal of Radiology - August 13, 2020 Category: Radiology Tags: Korean J Radiol Source Type: research

Current Status of Etiology, Epidemiology, Clinical Manifestations and Imagings for COVID-19.
Authors: Jiang MD, Zu ZY, Schoepf UJ, Savage RH, Zhang XL, Lu GM, Zhang LJ Abstract Coronavirus disease 2019 (COVID-19) is a transmissible respiratory disease that was initially reported in Wuhan, China in December 2019. With the alarming levels of COVID-19 spread worldwide, the World Health Organization characterized COVID-19 as a pandemic. Over the past several months, chest CT has played a vital role in early identification, disease severity assessment, and dynamic disease course monitoring of COVID-19. The published data has enriched our knowledge on the etiology, epidemiology, clinical manifestations, and path...
Source: Korean Journal of Radiology - August 13, 2020 Category: Radiology Tags: Korean J Radiol Source Type: research

Prognostic Implication of Volumetric Quantitative CT Analysis in Patients with COVID-19: A Multicenter Study in Daegu, Korea.
Authors: Park B, Park J, Lim JK, Shin KM, Lee J, Seo H, Lee YH, Heo J, Lee WK, Kim JY, Kim KB, Moon S, Choi S Abstract OBJECTIVE: Lung segmentation using volumetric quantitative computed tomography (CT) analysis may help predict outcomes of patients with coronavirus disease (COVID-19). The aim of this study was to investigate the relationship between CT volumetric quantitative analysis and prognosis in patients with COVID-19. MATERIALS AND METHODS: CT images from patients diagnosed with COVID-19 from February 18 to April 15, 2020 were retrospectively analyzed. CT with a negative finding, failure of quantitative...
Source: Korean Journal of Radiology - August 13, 2020 Category: Radiology Tags: Korean J Radiol Source Type: research

Radiologists' Solutions for COVID-19 in Korea.
Authors: Jung JI PMID: 32767869 [PubMed - as supplied by publisher] (Source: Korean Journal of Radiology)
Source: Korean Journal of Radiology - August 13, 2020 Category: Radiology Tags: Korean J Radiol Source Type: research

Comparison of Urologist Satisfaction for Different Types of Prostate MRI Reports: A Large Sample Investigation.
CONCLUSION: Structured reports, either using TNM or PI-RADS are highly preferred over conventional free-text reports and lead to fewer report-related post-hoc inquiries from urologists. PMID: 32783410 [PubMed - as supplied by publisher] (Source: Korean Journal of Radiology)
Source: Korean Journal of Radiology - August 13, 2020 Category: Radiology Tags: Korean J Radiol Source Type: research

Computed Tomography Findings Associated with Treatment Failure after Antibiotic Therapy for Acute Appendicitis.
CONCLUSION: Hypoenhancement of the appendiceal wall was significantly associated with treatment failure after antibiotic therapy for acute appendicitis. PMID: 32783411 [PubMed - as supplied by publisher] (Source: Korean Journal of Radiology)
Source: Korean Journal of Radiology - August 13, 2020 Category: Radiology Tags: Korean J Radiol Source Type: research

Pictorial Review of Mediastinal Masses with an Emphasis on Magnetic Resonance Imaging.
Authors: Park JW, Jeong WG, Lee JE, Lee HJ, Ki SY, Lee BC, Kim HO, Kim SK, Heo SH, Lim HS, Shin SS, Yoon W, Jeong YY, Kim YH Abstract Magnetic resonance imaging (MRI) has become a crucial tool for evaluating mediastinal masses considering that several lesions that appear indeterminate on computed tomography and radiography can be differentiated on MRI. Using a three-compartment model to localize the mass and employing a basic knowledge of MRI, radiologists can easily diagnose mediastinal masses. Here, we review the use of MRI in evaluating mediastinal masses and present the images of various mediastinal masses cate...
Source: Korean Journal of Radiology - August 13, 2020 Category: Radiology Tags: Korean J Radiol Source Type: research

Blood-Brain Barrier Disruption in Mild Traumatic Brain Injury Patients with Post-Concussion Syndrome: Evaluation with Region-Based Quantification of Dynamic Contrast-Enhanced MR Imaging Parameters Using Automatic Whole-Brain Segmentation.
CONCLUSION: BBB disruption, as reflected by the increased Ktrans and decreased vp values from the Patlak model, was observed throughout the bilateral cerebral cortex, bilateral cerebellar WM, and brainstem in mTBI patients with PCS. PMID: 32783413 [PubMed - as supplied by publisher] (Source: Korean Journal of Radiology)
Source: Korean Journal of Radiology - August 13, 2020 Category: Radiology Tags: Korean J Radiol Source Type: research

Troponin-Positive Non-Obstructive Coronary Arteries and Myocardial Infarction with Non-Obstructive Coronary Arteries: Definition, Etiologies, and Role of CT and MR Imaging.
Authors: Yoo SM, Jang S, Kim JA, Chun EJ Abstract In approximately 10% of patients with acute myocardial infarction (MI), angiography does not reveal an obstructive coronary stenosis. This is known as myocardial infarction with non-obstructive coronary arteries (MINOCA), which has complex and multifactorial causes. However, this term can be confusing and open to dual interpretation, because MINOCA is also used to describe patients with acute myocardial injury caused by ischemia-related myocardial necrosis. Therefore, with regards to this specific context of MINOCA, the generic term for MINOCA should be replaced wit...
Source: Korean Journal of Radiology - August 13, 2020 Category: Radiology Tags: Korean J Radiol Source Type: research

Histological Validation of Cardiovascular Magnetic Resonance T1 Mapping for Assessing the Evolution of Myocardial Injury in Myocardial Infarction: An Experimental Study.
Authors: Zhang L, Yang ZG, Xu H, Yang MX, Xu R, Chen L, Sun R, Miao T, Zhao J, Zhou X, Fu C, Guo Y Abstract OBJECTIVE: To determine whether T1 mapping could monitor the dynamic changes of injury in myocardial infarction (MI) and be histologically validated. MATERIALS AND METHODS: In 22 pigs, MI was induced by ligating the left anterior descending artery and they underwent serial cardiovascular magnetic resonance examinations with modified Look-Locker inversion T1 mapping and extracellular volume (ECV) computation in acute (within 24 hours, n = 22), subacute (7 days, n = 13), and chronic (3 months, n = 7) phases...
Source: Korean Journal of Radiology - August 13, 2020 Category: Radiology Tags: Korean J Radiol Source Type: research

Dynamic CT Myocardial Perfusion Imaging in Patients without Obstructive Coronary Artery Disease: Quantification of Myocardial Blood Flow according to Varied Heart Rate Increments after Stress.
CONCLUSION: The global MBF value was associated with the extent of increase in HR after stress. Significantly higher global MBF was seen in subjects with HR increment of ≥ 20 bpm. PMID: 32783416 [PubMed - as supplied by publisher] (Source: Korean Journal of Radiology)
Source: Korean Journal of Radiology - August 13, 2020 Category: Radiology Tags: Korean J Radiol Source Type: research

Neurofluid Dynamics and the Glymphatic System: A Neuroimaging Perspective.
Authors: Taoka T, Naganawa S Abstract The glymphatic system hypothesis is a concept describing the clearance of waste products from the brain. The term "glymphatic system" combines the glial and lymphatic systems and is typically described as follows. The perivascular space functions as a conduit that drains cerebrospinal fluid (CSF) into the brain parenchyma. CSF guided to the perivascular space around the arteries enters the interstitium of brain tissue via aquaporin-4 water channels to clear waste proteins into the perivascular space around the veins before being drained from the brain. In this review,...
Source: Korean Journal of Radiology - August 13, 2020 Category: Radiology Tags: Korean J Radiol Source Type: research

Sonographic Assessment of the Extent of Extrathyroidal Extension in Thyroid Cancer.
CONCLUSION: Sonography is considered beneficial in the diagnosis of ETE to the strap muscle, trachea, and RLN. Assessment of ETE is important for the accurate staging of thyroid cancer, which in turn determines the extent of surgery or whether active surveillance is appropriate or not. PMID: 32729261 [PubMed - as supplied by publisher] (Source: Korean Journal of Radiology)
Source: Korean Journal of Radiology - July 31, 2020 Category: Radiology Tags: Korean J Radiol Source Type: research

Incremental Image Noise Reduction in Coronary CT Angiography Using a Deep Learning-Based Technique with Iterative Reconstruction.
Authors: Hong JH, Park EA, Lee W, Ahn C, Kim JH Abstract OBJECTIVE: To assess the feasibility of applying a deep learning-based denoising technique to coronary CT angiography (CCTA) along with iterative reconstruction for additional noise reduction. MATERIALS AND METHODS: We retrospectively enrolled 82 consecutive patients (male:female = 60:22; mean age, 67.0 ± 10.8 years) who had undergone both CCTA and invasive coronary artery angiography from March 2017 to June 2018. All included patients underwent CCTA with iterative reconstruction (ADMIRE level 3, Siemens Healthineers). We developed a deep learning ...
Source: Korean Journal of Radiology - July 31, 2020 Category: Radiology Tags: Korean J Radiol Source Type: research

Implementation of a Deep Learning-Based Computer-Aided Detection System for the Interpretation of Chest Radiographs in Patients Suspected for COVID-19.
Authors: Hwang EJ, Kim H, Yoon SH, Goo JM, Park CM Abstract OBJECTIVE: To describe the experience of implementing a deep learning-based computer-aided detection (CAD) system for the interpretation of chest X-ray radiographs (CXR) of suspected coronavirus disease (COVID-19) patients and investigate the diagnostic performance of CXR interpretation with CAD assistance. MATERIALS AND METHODS: In this single-center retrospective study, initial CXR of patients with suspected or confirmed COVID-19 were investigated. A commercialized deep learning-based CAD system that can identify various abnormalities on CXR was impl...
Source: Korean Journal of Radiology - July 31, 2020 Category: Radiology Tags: Korean J Radiol Source Type: research

Halo, Reversed Halo, or Both? Atypical Computed Tomography Manifestations of Coronavirus Disease (COVID-19) Pneumonia: The "Double Halo Sign".
Halo, Reversed Halo, or Both? Atypical Computed Tomography Manifestations of Coronavirus Disease (COVID-19) Pneumonia: The "Double Halo Sign". Korean J Radiol. 2020 Jul 17;: Authors: Poerio A, Sartoni M, Lazzari G, Valli M, Morsiani M, Zompatori M Abstract The epidemic of 2019 novel coronavirus, later named as coronavirus disease (COVID-19), began in Wuhan, China in December 2019 and has spread rapidly worldwide. Early diagnosis is crucial for the management of the patients with COVID-19, but the gold standard diagnostic test for this infection, the reverse transcriptase polymerase chain reac...
Source: Korean Journal of Radiology - July 31, 2020 Category: Radiology Tags: Korean J Radiol Source Type: research

Pulmonary Fibrosis Due to COVID-19 Pneumonia.
Authors: Kayhan S, Kocakoç E PMID: 32729265 [PubMed - as supplied by publisher] (Source: Korean Journal of Radiology)
Source: Korean Journal of Radiology - July 31, 2020 Category: Radiology Tags: Korean J Radiol Source Type: research

Impact of Non-Calcified Specimen Pathology on the Underestimation of Malignancy for the Incomplete Retrieval of Suspicious Calcifications Diagnosed as Flat Epithelial Atypia or Atypical Ductal Hyperplasia by Stereotactic Vacuum-Assisted Breast Biopsy.
CONCLUSION: Considering that the calcification extent and pathology of non-calcified specimens may be beneficial in determining the likelihood of malignancy underestimation, excision after FEA or ADH diagnosis by VABB is required, except for the diagnoses of FEA coexisting without atypia lesions in non-calcified specimens. PMID: 32729266 [PubMed - as supplied by publisher] (Source: Korean Journal of Radiology)
Source: Korean Journal of Radiology - July 31, 2020 Category: Radiology Tags: Korean J Radiol Source Type: research

Utility and Diagnostic Performance of Automated Breast Ultrasound System in Evaluating Pure Non-Mass Enhancement on Breast Magnetic Resonance Imaging.
Authors: Kwon BR, Chang JM, Kim SY, Lee SH, Shin SU, Yi A, Cho N, Moon WK Abstract OBJECTIVE: To compare the utility and diagnostic performance of automated breast ultrasound system (ABUS) with that of hand-held ultrasound (HHUS) in evaluating pure non-mass enhancement (NME) lesions on breast magnetic resonance imaging (MRI). MATERIALS AND METHODS: One hundred twenty-six consecutive MRI-visible pure NME lesions of 122 patients with breast cancer were assessed from April 2016 to March 2017. Two radiologists reviewed the preoperative breast MRI, ABUS, and HHUS images along with mammography (MG) findings. The NME ...
Source: Korean Journal of Radiology - July 31, 2020 Category: Radiology Tags: Korean J Radiol Source Type: research

Long-Term Follow-Up Ultrasonographic Findings of Intrathyroidal Thymus in Children.
CONCLUSION: On follow-up US, an intrathyroidal thymus may be decreased in size, with indistinct margins, or show changes to a hyperechoic mass. Decreases in size may be associated with changing to indistinct margins, and changes to hyperechogenicity may be associated with increasing age. PMID: 32729268 [PubMed - as supplied by publisher] (Source: Korean Journal of Radiology)
Source: Korean Journal of Radiology - July 31, 2020 Category: Radiology Tags: Korean J Radiol Source Type: research

Radiofrequency Ablation Using a Separable Clustered Electrode for the Treatment of Hepatocellular Carcinomas: A Randomized Controlled Trial of a Dual-Switching Monopolar Mode Versus a Single-Switching Monopolar Mode.
This study aimed to prospectively compare the efficacy, safety, and mid-term outcomes of dual-switching monopolar (DSM) radiofrequency ablation (RFA) to those of conventional single-switching monopolar (SSM) RFA in the treatment of hepatocellular carcinoma (HCC). MATERIALS AND METHODS: This single-center, two-arm, parallel-group, randomized controlled study was approved by the Institutional Review Board. Written informed consent was obtained from all patients upon enrollment. A total of 80 patients with 94 HCC nodules were randomized into either the DSM-RFA group or SSM-RFA group in a 1:1 ratio, using a blocked randomi...
Source: Korean Journal of Radiology - July 31, 2020 Category: Radiology Tags: Korean J Radiol Source Type: research

Assessment of Diffusion Tensor Imaging Parameters of Hepatic Parenchyma for Differentiation of Biliary Atresia from Alagille Syndrome.
CONCLUSION: Hepatic DTI parameters are promising quantitative imaging parameters for the detection of hepatic parenchymal changes in BA and ALGS and may be an additional noninvasive imaging tool for the differentiation of BA from ALGS. PMID: 32729270 [PubMed - as supplied by publisher] (Source: Korean Journal of Radiology)
Source: Korean Journal of Radiology - July 31, 2020 Category: Radiology Tags: Korean J Radiol Source Type: research

Radiomics and Deep Learning from Research to Clinical Workflow: Neuro-Oncologic Imaging.
Authors: Park JE, Kickingereder P, Kim HS Abstract Imaging plays a key role in the management of brain tumors, including the diagnosis, prognosis, and treatment response assessment. Radiomics and deep learning approaches, along with various advanced physiologic imaging parameters, hold great potential for aiding radiological assessments in neuro-oncology. The ongoing development of new technology needs to be validated in clinical trials and incorporated into the clinical workflow. However, none of the potential neuro-oncological applications for radiomics and deep learning has yet been realized in clinical practice...
Source: Korean Journal of Radiology - July 31, 2020 Category: Radiology Tags: Korean J Radiol Source Type: research

Correlations between the Clinical and Ultrasonographic Parameters of Congenital Muscular Torticollis without a Sternocleidomastoid Mass.
Authors: Hwang J, Khil EK, Jung SJ, Choi JA Abstract OBJECTIVE: To determine whether ultrasonography at initial presentation can help assess the clinical severity of congenital muscular torticollis (CMT) in infants without a sternocleidomastoid muscle (SCM) mass. MATERIALS AND METHODS: This retrospective study included 71 infants aged less than 12 months (4.1 ± 2.3 months) with non-mass CMT. The clinical severity was divided into three grades (groups 1-3) based on the degree of lateral head bending or cervical rotation. The difference (SCM-D) and ratio (SCM-R) between the maximal thickness of the affecte...
Source: Korean Journal of Radiology - July 31, 2020 Category: Radiology Tags: Korean J Radiol Source Type: research

Effects of Remote Ischemic Pre-Conditioning to Prevent Contrast-Induced Nephropathy after Intravenous Contrast Medium Injection: A Randomized Controlled Trial.
CONCLUSION: The risk of CIN after an IV injection of CM is very low in patients with Mehran risk score greater than or equal to six and even in the patients who are unable to receive preventive hyperhydration. Hence, the Mehran risk score may not be an appropriate method for the estimation of the risk of CIN after IV CM injection. PMID: 32729273 [PubMed - as supplied by publisher] (Source: Korean Journal of Radiology)
Source: Korean Journal of Radiology - July 31, 2020 Category: Radiology Tags: Korean J Radiol Source Type: research

Two-Dimensional-Shear Wave Elastography with a Propagation Map: Prospective Evaluation of Liver Fibrosis Using Histopathology as the Reference Standard.
Authors: Lee DH, Lee ES, Lee JY, Bae JS, Kim H, Lee KB, Yu SJ, Cho EJ, Lee JH, Cho YY, Han JK, Choi BI Abstract OBJECTIVE: The aim of this study was to prospectively evaluate whether liver stiffness (LS) assessments, obtained by two-dimensional (2D)-shear wave elastography (SWE) with a propagation map, can evaluate liver fibrosis stage using histopathology as the reference standard. MATERIALS AND METHODS: We prospectively enrolled 123 patients who had undergone percutaneous liver biopsy from two tertiary referral hospitals. All patients underwent 2D-SWE examination prior to biopsy, and LS values (kilopascal [kP...
Source: Korean Journal of Radiology - July 31, 2020 Category: Radiology Tags: Korean J Radiol Source Type: research

Paclitaxel-Coated Balloon versus Plain Balloon Angioplasty for Dysfunctional Autogenous Radiocephalic Arteriovenous Fistulas: A Prospective Randomized Controlled Trial.
CONCLUSION: Paclitaxel-coated balloon use did not significantly improve TLPP or TLSP in the treatment of juxta-anastomotic stenosis of dysfunctional RCAVFs. PMID: 32729275 [PubMed - as supplied by publisher] (Source: Korean Journal of Radiology)
Source: Korean Journal of Radiology - July 31, 2020 Category: Radiology Tags: Korean J Radiol Source Type: research

Combined Hepatocellular-Cholangiocarcinoma: Changes in the 2019 World Health Organization Histological Classification System and Potential Impact on Imaging-Based Diagnosis.
Authors: Kim TH, Kim H, Joo I, Lee JM Abstract Combined hepatocellular-cholangiocarcinoma (cHCC-CCA) is a primary liver cancer (PLC) with both hepatocytic and cholangiocytic phenotypes. Recently, the World Health Organization (WHO) updated its histological classification system for cHCC-CCA. Compared to the previous WHO histological classification system, the new version no longer recognizes subtypes of cHCC-CCA with stem cell features. Furthermore, some of these cHCC-CCA subtypes with stem cell features have been recategorized as either hepatocellular carcinomas (HCCs) or intrahepatic cholangiocarcinomas (ICCs). A...
Source: Korean Journal of Radiology - July 31, 2020 Category: Radiology Tags: Korean J Radiol Source Type: research

Validation of Deep-Learning Image Reconstruction for Low-Dose Chest Computed Tomography Scan: Emphasis on Image Quality and Noise.
The objective image signal and noise, which represented mean attenuation value and standard deviation in Hounsfield units for the lungs, mediastinum, liver, and background air, and subjective image contrast, image noise, and conspicuity of structures were evaluated. The differences between CT scan images subjected to ASiR-V 30%, DLIR-M, and DLIR-H were evaluated. RESULTS: Based on the objective analysis, the image signals did not significantly differ among ASiR-V 30%, DLIR-M, and DLIR-H (p = 0.949, 0.737, 0.366, and 0.358 in the lungs, mediastinum, liver, and background air, respectively). However, the noise was signif...
Source: Korean Journal of Radiology - July 31, 2020 Category: Radiology Tags: Korean J Radiol Source Type: research

Characteristics of COVID-19 Patients Who Progress to Pneumonia on Follow-Up Chest Radiograph: 236 Patients from a Single Isolated Cohort in Daegu, South Korea.
Authors: Jung HK, Kim JY, Lee MS, Lee JY, Park JS, Hyun M, Kim HA, Kwon YS, Choi SW, Moon SM, Suh YJ Abstract OBJECTIVE: We investigated the prevalence of pneumonia in novel coronavirus disease 2019 (COVID-19) patients using chest radiographs to identify the characteristics of those with initially negative chest radiographs, who were positive for pneumonia on follow-up. MATERIALS AND METHODS: Retrospective cohort data of 236 COVID-19 patients were reviewed. Chest radiography was performed on admission, with serial radiographs obtained until discharge. The 'positive conversion group' was defined as patients whos...
Source: Korean Journal of Radiology - July 31, 2020 Category: Radiology Tags: Korean J Radiol Source Type: research

Severe Acute Respiratory Syndrome Coronavirus 2 Detection in the Radiology Department of Hospitals in Wuhan, China.
Authors: Tang Y, Lei Z, Liu S, Li J, Xie S, Niu Y, Tang L PMID: 32729279 [PubMed - as supplied by publisher] (Source: Korean Journal of Radiology)
Source: Korean Journal of Radiology - July 31, 2020 Category: Radiology Tags: Korean J Radiol Source Type: research

Follow-Up Intervals for Breast Imaging Reporting and Data System Category 3 Lesions on Screening Ultrasound in Screening and Tertiary Referral Centers.
CONCLUSION: One-year follow-up rather than 6-month follow-up may be suitable for BI-RADS 3 lesions on screening US found in screening centers. However, more caution is needed regarding similar findings in tertiary centers where 6-month follow-up may be more appropriate. PMID: 32691538 [PubMed - in process] (Source: Korean Journal of Radiology)
Source: Korean Journal of Radiology - July 23, 2020 Category: Radiology Tags: Korean J Radiol Source Type: research

Feasibility Study of Synthetic Diffusion-Weighted MRI in Patients with Breast Cancer in Comparison with Conventional Diffusion-Weighted MRI.
Authors: Choi BH, Baek HJ, Ha JY, Ryu KH, Moon JI, Park SE, Bae K, Jeon KN, Jung EJ Abstract OBJECTIVE: To investigate the clinical feasibility of synthetic diffusion-weighted imaging (sDWI) at different b-values in patients with breast cancer by assessing the diagnostic image quality and the quantitative measurements compared with conventional diffusion-weighted imaging (cDWI). MATERIALS AND METHODS: Fifty patients with breast cancer were assessed using cDWI at b-values of 800 and 1500 s/mm² (cDWI800 and cDWI1500) and sDWI at b-values of 1000 and 1500 s/mm² (sDWI1000 and sDWI1500). Qualitative analys...
Source: Korean Journal of Radiology - July 23, 2020 Category: Radiology Tags: Korean J Radiol Source Type: research

Combination of Quantitative Parameters of Shear Wave Elastography and Superb Microvascular Imaging to Evaluate Breast Masses.
This study aimed to evaluate the diagnostic value of combining the quantitative parameters of shear wave elastography (SWE) and superb microvascular imaging (SMI) to breast ultrasound (US) to differentiate between benign and malignant breast masses. MATERIALS AND METHODS: A total of 200 pathologically confirmed breast lesions in 192 patients were retrospectively reviewed using breast US with B-mode imaging, SWE, and SMI. Breast masses were assessed based on the breast imaging reporting and data system (BI-RADS) and quantitative parameters using the maximum elasticity (Emax) and ratio (Eratio) in SWE and the vascular in...
Source: Korean Journal of Radiology - July 23, 2020 Category: Radiology Tags: Korean J Radiol Source Type: research

Prognostic Value of Coronary CT Angiography for Predicting Poor Cardiac Outcome in Stroke Patients without Known Cardiac Disease or Chest Pain: The Assessment of Coronary Artery Disease in Stroke Patients Study.
Authors: Yoon SH, Kim E, Jeon Y, Yi SY, Bae HJ, Jang IK, Lee JM, Yoo SM, White CS, Chun EJ Abstract OBJECTIVE: To assess the incremental prognostic value of coronary computed tomography angiography (CCTA) in comparison to a clinical risk model (Framingham risk score, FRS) and coronary artery calcium score (CACS) for future cardiac events in ischemic stroke patients without chest pain. MATERIALS AND METHODS: This retrospective study included 1418 patients with acute stroke who had no previous cardiac disease and underwent CCTA, including CACS. Stenosis degree and plaque types (high-risk, non-calcified, mixed, or...
Source: Korean Journal of Radiology - July 23, 2020 Category: Radiology Tags: Korean J Radiol Source Type: research

Prognostic Value of Tumor Regression Grade on MR in Rectal Cancer: A Large-Scale, Single-Center Experience.
CONCLUSION: mrTRG may predict OS and DFS comparably or even better compared to pTRG. The addition of DWI on T2-weighted MRI may improve interobserver agreement on mrTRG. PMID: 32691542 [PubMed - in process] (Source: Korean Journal of Radiology)
Source: Korean Journal of Radiology - July 23, 2020 Category: Radiology Tags: Korean J Radiol Source Type: research