Lung base CT findings in COVID-19 adult patients presenting with acute abdominal complaints: case series from a major New York City health system
ConclusionsCOVID-19 patients can present with abdominal symptoms, especially in non-elderly patients with underlying health conditions. Lung base findings on abdominal CT are consistent with published reports. Radiologists should be aware of atypical presentations of COVID-19.Key Points•COVID-19 infected patients can present with acute abdominal symptoms, especially in non-elderly patients with underlying health conditions, and may frequently require hospitalisation (81%).•There was no difference in lung base CT findings between patients who were discharged and those who were hospitalised.•Lung base CT findi...
Source: European Radiology - July 4, 2020 Category: Radiology Source Type: research

Automated detection of pulmonary embolism in CT pulmonary angiograms using an AI-powered algorithm
ConclusionThe AI prototype algorithm we tested has a high degree of diagnostic accuracy for the detection of PE on CTPAs. Sensitivity and specificity are balanced, which is a prerequisite for its clinical usefulness.Key Points•An AI-based prototype algorithm showed a high degree of diagnostic accuracy for the detection of pulmonary embolism on CTPAs.•It can therefore help clinicians to automatically prioritize exams with a high suspection of pulmonary embolism and serve as secondary reading tool.•By complementing traditional ways of worklist prioritization in radiology departments, this can speed up the diag...
Source: European Radiology - July 3, 2020 Category: Radiology Source Type: research

Oligometastatic adrenocortical carcinoma: the role of image-guided thermal ablation
AbstractObjectivesTo evaluate the impact of image-guided ablation of liver and lung metastases from adrenocortical carcinoma (ACC).MethodsPatients with oligometastatic ACC (liver and lung metastases) who underwent image-guided ablation were retrospectively included in the study. Complete ablation (CA) at the first contrast-enhanced CT control, local tumor progression (LTP), local tumor progression-free survival (LTPFS), liver disease-free survival (LDFS), and overall survival (OS) were evaluated. Correlation between outcomes and other prognostic factors (including Ki67, hormonal secretion, and progression-free survival aft...
Source: European Radiology - July 3, 2020 Category: Radiology Source Type: research

COVID-19 impact assessment on the French radiological centers: a nationwide survey
ConclusionIn case of local high density COVID-19, CT workflow is strongly modified and redirected to the management of these specific patients.Key Points• Over the 4-week survey period, 117,686 chest CT (CTtotal) were performed among the responding centers, including 61,784 (52%) CT performed for COVID-19 (CTcovid).• Across the country, the ratio CTcovid/CTtotalvaried from 0.36 to 0.59 and depended significantly on the local epidemic density (p  = 0.003).• In clinical practice, in a context of growing epidemic, in France, chest CT was used as a surrogate to RT-PCR for patient triage. (Source: European Radiology)
Source: European Radiology - July 3, 2020 Category: Radiology Source Type: research

Application of DynaCT angiographic reconstruction in balloon pulmonary angioplasty
AbstractObjectivesTo investigate the feasibility and accuracy of balloon pulmonary angioplasty (BPA) using DynaCT angiographic reconstruction guidance.MethodsThirty-four BPAs (23 CTEPH patients) targeting 175 pulmonary arteries were included. Eleven BPAs (2D group) were guided by DSA two-dimensional angiography. Another twenty-three BPAs (3D group) were guided using DynaCT angiographic reconstruction. The volume rendering (VR) method was used to obtain a three-dimensional image of the blood vessels. This image was used as a reference to continue BPA treatment under the guidance of vascular three-dimensional reconstruction ...
Source: European Radiology - July 3, 2020 Category: Radiology Source Type: research

Radiomics nomogram for the prediction of 2019 novel coronavirus pneumonia caused by SARS-CoV-2
AbstractObjectivesTo develop and validate a radiomics model for predicting 2019 novel coronavirus (COVID-19) pneumonia.MethodsFor this retrospective study, a radiomics model was developed on the basis of a training set consisting of 136 patients with COVID-19 pneumonia and 103 patients with other types of viral pneumonia. Radiomics features were extracted from the lung parenchyma window. A radiomics signature was built on the basis of reproducible features, using the least absolute shrinkage and selection operator method (LASSO). Multivariable logistic regression model was adopted to establish a radiomics nomogram. Nomogra...
Source: European Radiology - July 3, 2020 Category: Radiology Source Type: research

Chest CT practice and protocols for COVID-19 from radiation dose management perspective
AbstractThe global pandemic of coronavirus disease 2019 (COVID-19) has upended the world with over 6.6 million infections and over 391,000 deaths worldwide. Reverse-transcription polymerase chain reaction (RT-PCR) assay is the preferred method of diagnosis of COVID-19 infection. Yet, chest CT is often used in patients with known or suspected COVID-19 due to regional preferences, lack of availability of PCR assays, and false-negative PCR assays, as well as for monitoring of disease progression, complications, and treatment response. The International Atomic Energy Agency (IAEA) organized a webinar to discuss CT practice and...
Source: European Radiology - July 3, 2020 Category: Radiology Source Type: research

From deep learning to dark fields —medical imaging physics in ECR 2020
(Source: European Radiology)
Source: European Radiology - July 3, 2020 Category: Radiology Source Type: research

A fully automated software platform for structural mitral valve analysis
AbstractObjectiveTo evaluate a novel fully automated mitral valve analysis software platform for cardiac computer tomography angiography (CCTA)-based structural heart therapy procedure planning.MethodsThe study included 52 patients (25 women; mean age, 66.9 ± 12.4 years) who had undergone CCTA prior to transcatheter mitral valve replacement (TMVR) or surgical mitral valve intervention (replacement or repair). Therapeutically relevant mitral valve annulus parameters (projected area, circumference, trigone-to-trigone (T-T) distance, anterior-posterior ( AP) diameter, and anterolateral-posteromedial (AL-PM) diameter) w...
Source: European Radiology - July 2, 2020 Category: Radiology Source Type: research

A deep learning approach to characterize 2019 coronavirus disease (COVID-19) pneumonia in chest CT images
AbstractObjectivesTo utilize a deep learning model for automatic detection of abnormalities in chest CT images from COVID-19 patients and compare its quantitative determination performance with radiological residents.MethodsA deep learning algorithm consisted of lesion detection, segmentation, and location was trained and validated in 14,435 participants with chest CT images and definite pathogen diagnosis. The algorithm was tested in a non-overlapping dataset of 96 confirmed COVID-19 patients in three hospitals across China during the outbreak. Quantitative detection performance of the model was compared with three radiol...
Source: European Radiology - July 2, 2020 Category: Radiology Source Type: research

A predictive model and scoring system combining clinical and CT characteristics for the diagnosis of COVID-19
AbstractObjectivesTo develop a predictive model and scoring system to enhance the diagnostic efficiency for coronavirus disease 2019 (COVID-19).MethodsFrom January 19 to February 6, 2020, 88 confirmed COVID-19 patients presenting with pneumonia and 80 non-COVID-19 patients suffering from pneumonia of other origins were retrospectively enrolled. Clinical data and laboratory results were collected. CT features and scores were evaluated at the segmental level according to the lesions ’ position, attenuation, and form. Scores were calculated based on the size of the pneumonia lesion, which graded at the range of 1 to 4. ...
Source: European Radiology - July 1, 2020 Category: Radiology Source Type: research

Comparison of whole-body MRI with diffusion-weighted imaging and PET/CT in lymphoma staging
AbstractObjectivesTo compare the diagnostic efficiency of whole-body MRI-DWI and PET/CT in lymphoma staging.MethodsA prospective study enrolled 92 patients with lymphoma. Prior to treatment, all patients underwent whole-body MRI-DWI and PET-CT. The methods ’ efficiency was compared in the diagnosis of lymph node (LN) and organ involvement, and in determining lymphoma stage.ResultsSensitivity, specificity, and accuracy in the diagnosis of enlarged LN involvement were 98.2%, 99.9%, and 99.3%, respectively, for MRI-DWI, and 99.4%, 100.0%, and 99.8%, respectively, for PET/CT. ROC analysis showed similar methods ’ e...
Source: European Radiology - June 19, 2020 Category: Radiology Source Type: research

Noninvasive prediction of lymph node status for patients with early-stage cervical cancer based on radiomics features from ultrasound images
AbstractObjectiveTo investigate the feasibility of a noninvasive detection of lymph node metastasis (LNM) for early-stage cervical cancer (ECC) patients with radiomics methods based on the textural features from ultrasound images.MethodsOne hundred seventy-two ECC patients between January 2014 and September 2018 with pathologically confirmed lymph node status (LNS) and preoperative ultrasound images were retrospectively reviewed. Regions of interest (ROIs) were delineated by a senior radiologist in the ultrasound images. LIFEx was applied to extract textural features for radiomics study. Least absolute shrinkage and select...
Source: European Radiology - June 19, 2020 Category: Radiology Source Type: research

Evaluation of MR elastography as a response parameter for transarterial chemoembolization of colorectal liver metastases
AbstractObjectiveThe aim of this study was to evaluate magnetic resonance elastography (MRE) as a response parameter in patients who received transarterial chemoembolization (TACE) for the treatment of colorectal liver metastases.Materials and methodsForty-two patients (29 male patients; mean age, 61.5  years; range, 41–84 years) with repeated TACE therapy of colorectal liver metastases underwent on average 2 repetitive magnetic resonance imaging (MRI) and MRE exams in 4- to 6-week intervals using a 1.5-T scanner. MRE-based liver stiffness measurements were performed in normal liver parenchyma and in metast...
Source: European Radiology - June 19, 2020 Category: Radiology Source Type: research

CT-based radiomics and machine learning to predict spread through air space in lung adenocarcinoma
ConclusionCT-based radiomics model can preoperatively predict STAS in lung adenocarcinoma with good diagnosis performance.Key Points• CT-based radiomics and machine learning model can predict spread through air space (STAS) in lung adenocarcinoma with high accuracy.• The random forest (RF) model achieved an AUC of 0.754 (a sensitivity of 0.880 and a specificity of 0.588) for predicting STAS. (Source: European Radiology)
Source: European Radiology - June 19, 2020 Category: Radiology Source Type: research

Prognostic value of cardiovascular magnetic resonance in patients with biopsy-proven systemic sarcoidosis
AbstractObjectivesAs prognosis in sarcoidosis is determined by cardiac involvement, the objective was to study the added value of cardiovascular magnetic resonance (CMR) in risk stratification.MethodsIn 114 patients (48  ± 12 years/52% male) with biopsy-proven sarcoidosis, we studied the value of clinical and CMR-derived parameters to predict future events, using sustained ventricular tachycardia, ventricular fibrillation, aborted cardiac death, implantable cardioverter-defibrillator (ICD) placement with appr opriate shocks, hospitalization for heart failure, and death as composite endpoint. Media...
Source: European Radiology - June 19, 2020 Category: Radiology Source Type: research

Pattern-based vs. score-based guidelines using ultrasound features have different strengths in risk stratification of thyroid nodules
AbstractObjectiveTo evaluate and compare the diagnostic performances between recently published pattern-based and score-based TIRADS according to the experience level of the performer.MethodsFrom July 2013 to January 2019, 8657 thyroid nodules in 8364 patients that had been cytopathologically diagnosed as benign or malignant were included (mean size, 22.0  mm ± 12.1). Thyroid nodules were categorized into US-based final assessment categories and US-FNA indications of five recently published TIRADS. Radiologists performing the US examinations were divided into the experienced vs. inexperienced grou...
Source: European Radiology - June 19, 2020 Category: Radiology Source Type: research

The idea of tomography was published together with the news of the discovery of R öntgen rays—a historical note
(Source: European Radiology)
Source: European Radiology - June 19, 2020 Category: Radiology Source Type: research

The Radiology Department during the COVID-19 pandemic: a challenging, radical change
(Source: European Radiology)
Source: European Radiology - June 19, 2020 Category: Radiology Source Type: research

Correction to: A quantitative model based on clinically relevant MRI features differentiates lower grade gliomas and glioblastoma
The original version of this article, published on 05 February 2020, unfortunately contained a mistake. (Source: European Radiology)
Source: European Radiology - June 19, 2020 Category: Radiology Source Type: research

Magnetic resonance cholangiopancreatography with compressed sensing at 1.5 T: clinical application for the evaluation of branch duct IPMN of the pancreas
AbstractObjectivesTo evaluate magnetic resonance cholangiopancreatography (MRCP) with compressed sensing (CS) for the assessment of branch duct intraductal papillary mucinous neoplasm (BD-IPMN) of the pancreas. For this purpose, conventional navigator-triggered (NT) sampling perfection with application-optimized contrast using different flip angle evolutions (SPACE) MRCP was compared with various CS-SPACE-MRCP sequences in a clinical setting.MethodsA total of 41 patients (14 male, 27 female, mean age 68 years) underwent 1.5-T MRCP for the evaluation of BD-IPMN. The MRCP protocol consisted of the following sequences: conven...
Source: European Radiology - June 18, 2020 Category: Radiology Source Type: research

Clip migration after stereotactic vacuum-assisted breast biopsy with the patient in the decubitus position
ConclusionsThin breasts, superficial lesion location, posterior lesion depth, and high specimen number were the factors associated with clip migration.Key Points•We reported clip migration after ST VAB using an upright unit with the patient in the decubitus position.•The occurrence of clinically significant clip migration (>  2 cm) in our study was 8.5%, which was within the range of the other reports with the patient undergoing ST VAB in the prone position.•Thin breasts, high specimen number, and more posterior depth were the factors associated with significant clip migration. (Source: European Radiology)
Source: European Radiology - June 17, 2020 Category: Radiology Source Type: research

Characteristics of the left ventricular three-dimensional maximum principal strain using cardiac computed tomography: reference values from subjects with normal cardiac function
This study evaluated the characteristics of left ventricular maximum principal strain (LV-MPS) using cardiac CT in subjects with normal LV function.MethodsOf 973 subjects who underwent retrospective electrocardiogram-gated cardiac CT using a third-generation dual-source CT without beta-blocker administration, 31 subjects with preserved LV ejection fraction ≥ 55% assessed by echocardiography without coronary artery stenosis and cardiac pathology were retrospectively identified. CT images were reconstructed every 5% (0–95%) of the RR interval. LV-MPS and the time to peak (TTP) were analyzed using the 16-segme...
Source: European Radiology - June 17, 2020 Category: Radiology Source Type: research

Reduction of respiratory motion artifacts in gadoxetate-enhanced MR with a deep learning –based filter using convolutional neural network
AbstractObjectivesTo reveal the utility of motion artifact reduction with convolutional neural network (MARC) in gadoxetate disodium –enhanced multi-arterial phase MRI of the liver.MethodsThis retrospective study included 192 patients (131 men, 68.7  ± 10.3 years) receiving gadoxetate disodium–enhanced liver MRI in 2017. Datasets were submitted to a newly developed filter (MARC), consisting of 7 convolutional layers, and trained on 14,190 cropped images generated from abdominal MR images. Motion artifact for training was simulated by ad ding periodick-space domain noise to the images. ...
Source: European Radiology - June 17, 2020 Category: Radiology Source Type: research

A novel technique to assess fetal corpus callosum by two-dimensional axial plane
ConclusionsThe feasibility of incorporating an evaluation of CC into routine anatomical screening was demonstrated. Additionally, a focused examination of the craniocerebral axial planes exploring CC at the time of central nervous system scanning might facilitate CC anomaly detection.Key Points• Three axial planes with direct CC measurements can detect CC anomalies more accurately compared with indirect CC signs. Besides, this method is simpler, more convenient, and time-saving compared with the sagittal plane.• Assessing fetal CC on the axial plane helps clinicians to diagnose fetuses with abnormal CC.• A p...
Source: European Radiology - June 16, 2020 Category: Radiology Source Type: research

Pulmonary hypertension due to left heart disease: diagnostic value of pulmonary artery distensibility
AbstractObjectivesTo evaluate how pulmonary artery (PA) distensibility performs in detecting pulmonary hypertension due to left heart disease (PH-LHD) in comparison with parameters from ungated computed tomography (CT) and echocardiography.MethodsOne hundred patients (79 men, mean age  = 63 ± 17 years) with either severe heart failure with reduced ejection fraction (HFrEF), aortic stenosis, or primary mitral regurgitation prospectively underwent right heart catheterization, ungated CT, ECG-gated CT, and echocardiography. During the ECG-gated CT, the right PA distensibil ity was calcu...
Source: European Radiology - June 16, 2020 Category: Radiology Source Type: research

The vestibular aqueduct ossification on temporal bone CT: an old sign revisited to rule out the presence of endolymphatic hydrops in Meni ère’s disease patients
AbstractObjectivesMeni ère’s disease (MD) is associated with endolymphatic hydrops (EH), which is an accumulation of excessive endolymphatic fluid in the inner ear. However, using temporal bone CT, lower visualization rates of the vestibular aqueduct (VA) in these patients have also been reported.MethodsIn this retrospective single-center imaging study, we have included 25 healthy subjects and 47 patients having a definite, probable, or possible clinical diagnosis of MD that underwent temporal bone CT and inner ear MRI performed 4 h after contrast media administration. Two radiologists independently ranked the...
Source: European Radiology - June 15, 2020 Category: Radiology Source Type: research

Deep learning in interstitial lung disease —how long until daily practice
AbstractInterstitial lung diseases are a diverse group of disorders that involve inflammation and fibrosis of interstitium, with clinical, radiological, and pathological overlapping features. These are an important cause of morbidity and mortality among lung diseases. This review describes computer-aided diagnosis systems centered on deep learning approaches that improve the diagnostic of interstitial lung diseases. We highlighted the challenges and the implementation of important daily practice, especially in the early diagnosis of idiopathic pulmonary fibrosis (IPF). Developing a convolutional neuronal network (CNN) that...
Source: European Radiology - June 14, 2020 Category: Radiology Source Type: research

MR imaging of epithelial ovarian cancer: a combined model to predict histologic subtypes
AbstractObjectiveTo compare the performance of clinical features, conventional MR image features, ADC value, T2WI, DWI, DCE-MRI radiomics, and a combined multiple features model in predicting the type of epithelial ovarian cancer (EOC).MethodsIn this retrospective analysis, 61 EOC patients were confirmed by histology. Significant features (p
Source: European Radiology - June 13, 2020 Category: Radiology Source Type: research

Evaluation of liver iron overload with R2* relaxometry with versus without fat suppression: both are clinically accurate but there are differences
AbstractObjectivesTo assess clinically relevant difference in hepatic iron quantification using R2* relaxometry with (FS) and without (non-FS) fat saturation for the evaluation of patients with suspected hepatic iron overload.MethodsWe prospectively enrolled 134 patients who underwent 1.5-T MRI R2* relaxometry with FS and non-FS gradient echo sequences (12 echoes, initial TE  = 0.99 ms). Proton density fat fraction for the quantification of steatosis was assessed. Linear regression analyses and Bland-Altman plots including Lin’s concordance correlation coefficient were performed for correlation of ...
Source: European Radiology - June 13, 2020 Category: Radiology Source Type: research

Texture analysis in susceptibility-weighted imaging may be useful to differentiate acute from chronic multiple sclerosis lesions
ConclusionsTexture analysis on SWI sequences may be useful to differentiate acute from chronic MS lesions. The good diagnostic performance could help to reduce the need of intravenous contrast agent administration in follow-up MRI studies.Key Points•Texture analysis applied on SWI sequences may be useful to differentiate acute from chronic multiple sclerosis lesions•The good diagnostic performance could help to minimize the need of intravenous contrast agent administration in follow-up MRI studies (Source: European Radiology)
Source: European Radiology - June 13, 2020 Category: Radiology Source Type: research

Impact of focused ultrasound on the ethanol ablation of VX2 liver tumours in rabbits
ConclusionThe combination of EA and FUS could effectively increase the liver ablation volume and induce more complete tumour necrosis.Key Points•This study demonstrated a novel method for enhancing ethanol ablation and elucidated its potential to enhance percutaneous ethanol ablation (PEA) in a simple non-invasive way.•Ethanol excited by focused ultrasound (FUS) exposure tended to accumulate at the injection site, which could prevent ethanol from being washed out by the bloodstream.•The combination of EA and FUS could effectively increase the liver ablation volume and induce more complete tumour necrosis. (S...
Source: European Radiology - June 12, 2020 Category: Radiology Source Type: research

Radiofrequency ablation versus repeat resection for recurrent hepatocellular carcinoma ( ≤ 5 cm) after initial curative resection
ConclusionRFA has the same efficacy as repeat resection in recurrent HCC patients, but with fewer complications. RFA is more efficient and safer than repeat resection in patients with 2 or 3 recurrent tumor nodules.Key Points• Recurrence rate is up to 70% at 5 years for hepatocellular carcinoma (HCC) after initial resection.• RFA has the same efficacy as repeat resection in recurrent HCC patients, but with fewer complications.• RFA may be preferred for those with 2 or 3 recurrent HCC nodules. (Source: European Radiology)
Source: European Radiology - June 11, 2020 Category: Radiology Source Type: research

Comparing recall rates following implementation of digital breast tomosynthesis to synthetic 2D images and digital mammography on women with breast-conserving surgery
AbstractObjectivesTo evaluate the recall rates of digital mammography (DM) and synthetic images after adding digital breast tomosynthesis (DBT) in patients with breast-conserving surgery.MethodsFrom November 2015 to April 2017, 229 women with breast-conserving surgery due to breast cancer who underwent DBT after surgery were included (mean interval, 12.9 ± 1.4 months). All women underwent combo-mode DBT examinations including full-field DM, tomosynthesis, and reconstructed synthetic 2D images. Three board-certified breast radiologists reviewed the images sequentially: synthetic 2D+DBT and, 1 month later, DM and then...
Source: European Radiology - June 11, 2020 Category: Radiology Source Type: research

Evaluation of chronic carotid artery occlusion by non-contrast 3D-MERGE MR vessel wall imaging: comparison with 3D-TOF-MRA, contrast-enhanced MRA, and DSA
Conclusion3D-MERGE can reliably assess chronic carotid occlusive characteristics and has the ability to identify other vessel wall features of the occluded segment. This non-contrast MR vessel wall imaging technique is promising for assessment of CCAO.Key Points• Excellent agreement was found between 3D-MERGE and DSA for assessing chronic carotid artery occlusion, occlusion site, and proximal stump condition.• 3D-MERGE was shown to be a more accurate and efficient tool than 3D-TOF-MRA to detect the characteristics of the occluded segment.• 3D-MERGE provides not only luminal images for characterizing the prox...
Source: European Radiology - June 11, 2020 Category: Radiology Source Type: research

Breast-specific gamma imaging or ultrasonography as adjunct imaging diagnostics in women with mammographically dense breasts
ConclusionsFor women with mammographically dense breasts, MMG plus BSGI or US can improve the diagnostic accuracy. In addition, BSGI has high specificity and could reduce invasive biopsies and thus may represent a viable diagnostic imaging alternative for mammographically dense breasts.Key Points• Both BSGI and US can be applied as adjunct imaging diagnostics in women with mammographically dense breasts.• The diagnostic accuracy of MMG plus BSGI was higher than that of MMG plus US.• BSGI has the potential to be used as an adjunct diagnostic modality in women with mammographically dense breasts. (Source: European Radiology)
Source: European Radiology - June 10, 2020 Category: Radiology Source Type: research

Dynamic evolution of COVID-19 on chest computed tomography: experience from Jiangsu Province of China
ConclusionsVolume, density, and location of the pulmonary opacity and their evolution on CT varied with disease severity in COVID-19. These findings are valuable in understanding the nature of the disease and monitoring the patient ’s condition during the course of illness.Key Points• Volume, density, and location of the pulmonary opacity on CT change over time in COVID-19.• The evolution of CT appearance follows specific pattern, varying with disease severity. (Source: European Radiology)
Source: European Radiology - June 10, 2020 Category: Radiology Source Type: research

Association of “initial CT” findings with mortality in older patients with coronavirus disease 2019 (COVID-19)
AbstractObjectivesTo investigate the association of chest CT findings with mortality in clinical management of older patients.MethodsFrom January 21 to February 14, 2020, 98 older patients ( ≥ 60 years) who had undergone chest CT scans (“initial CT”) on admission were enrolled. Manifestation and CT score were compared between the death group and the survival group. In each group, patients were sub-grouped based on the time interval between symptom onset and the “initial CT” scan: subgroup1 (interval ≤ 5 days), subgroup2 (interval between 6 and 10 days), and subgrou...
Source: European Radiology - June 10, 2020 Category: Radiology Source Type: research

Deep learning analysis using FDG-PET to predict treatment outcome in patients with oral cavity squamous cell carcinoma
AbstractObjectiveTo assess the utility of deep learning analysis using18F-fluorodeoxyglucose (FDG) uptake by positron emission tomography (PET/CT) to predict disease-free survival (DFS) in patients with oral cavity squamous cell carcinoma (OCSCC).MethodsOne hundred thirteen patients with OCSCC who received pretreatment FDG-PET/CT were included. They were divided into training (83 patients) and test (30 patients) sets. The diagnosis of treatment control/failure and the DFS rate were obtained from patients ’ medical records. In deep learning analyses, three planes of axial, coronal, and sagittal FDG-PET images were ass...
Source: European Radiology - June 10, 2020 Category: Radiology Source Type: research

Clinico-radiological characteristic-based machine learning in reducing unnecessary prostate biopsies of PI-RADS 3 lesions with dual validation
ConclusionsThe machine learning –based random forest classifier provided a reliable probability if a PI-RADS 3 patient was benign.Key Points•Machine learning –based classifiers could combine the clinical characteristics with accessible information on image report of PI-RADS 3 patient to generate a probability of malignancy.•This probability could assist surgeons to make diagnostic decisions with more confidence and higher efficiency. (Source: European Radiology)
Source: European Radiology - June 10, 2020 Category: Radiology Source Type: research

Carbon footprint of air travel to international radiology conferences: FOMO?
(Source: European Radiology)
Source: European Radiology - June 10, 2020 Category: Radiology Source Type: research

Early chest CT features of patients with 2019 novel coronavirus (COVID-19) pneumonia: relationship to diagnosis and prognosis
ConclusionChest CT plays a crucial role in the early diagnosis of COVID-19, particularly for those patients with a negative RT-PCR. The initial features in CT may be associated with prognosis.Key Points•Chest CT is valuable for the early diagnosis of COVID-19, particularly for those patients with a negative RT-PCR.•The early CT findings of COVID-19 in ICU patients differed from those of discharged patients. (Source: European Radiology)
Source: European Radiology - June 9, 2020 Category: Radiology Source Type: research

CT-guided radiofrequency ablation for osteoid osteomas: a systematic review
ConclusionsA decrease in TF observed between 2011 –2019 compared to 2002–2010 may reflect improvements in operator technique or advancements in equipment. Duration of ablation, patient age, or location of OO failed to significantly correlate with TF.Key Points•CT-guided radiofrequency ablation of osteoid osteomas is a safe technique with a low rate of treatment failure (8.3% failure rate after the primary radiofrequency reducing to 3.1% following a secondary treatment).•The treatment failure rate has decreased over time, possibly due to an improved understanding of the disease process, better techniqu...
Source: European Radiology - June 9, 2020 Category: Radiology Source Type: research

Efficacy and safety of bone marrow aspiration and biopsy using fluoroscopic guidance and a drill-powered needle: clinical experience from 775 cases
ConclusionsThe use of fluoroscopic guidance and a drill-powered needle for bone marrow aspiration and biopsy is a safe and efficacious procedure.Key Points• Fluoroscopy can be utilized for imaging guidance during bone marrow aspiration and biopsy.• The use of fluoroscopic guidance and a drill-powered needle for bone marrow aspiration and biopsy has a high diagnostic yield.• The procedure has an excellent patient safety profile. (Source: European Radiology)
Source: European Radiology - June 9, 2020 Category: Radiology Source Type: research

Acute pulmonary embolism in non-hospitalized COVID-19 patients referred to CTPA by emergency department
ConclusionsNon-hospitalized patients with COVID-19 pneumonia referred to CT scan by the emergency departments are at risk of APE. The presence of APE was not limited to severe or critical clinical type of COVID-19 pneumonia.Key Points• Acute pulmonary embolism was found in 18% of non-hospitalized COVID-19 patients referred by the emergency department to CTPA. Two (15%) patients had main, four (30%) lobar, and seven (55%) segmental acute pulmonary embolism.• Five of 13 (38%) patients with acute pulmonary embolism had a moderate clinical type.• Severity and radiological features of COVID-19 pneumonia showed no...
Source: European Radiology - June 9, 2020 Category: Radiology Source Type: research

Hemosiderin deposition in papillary renal cell carcinoma and its potential to mask enhancement on MRI: analysis of 110 cases
ConclusionspRCC with no subjective enhancement on contrast-enhanced MR showed hemosiderin deposition evident by lower SIindex and higher Dindex. Hemosiderin deposition might mask the tumor enhancement on MR.Key Points• 5% of papillary renal cell carcinoma showed imperceptible enhancement on contrast-enhanced MR.• Hemosiderin deposition in papillary renal cell carcinoma might mask the tumor enhancement on contrast-enhanced MR due to T2/T2*-shortening effects.• A renal lesion with extensive hemosiderin deposition but no perceptible enhancement on MR should be considered suspicious for papillary renal cell carc...
Source: European Radiology - June 9, 2020 Category: Radiology Source Type: research

Pelvic Trauma: factors predicting arterial hemorrhage and the role of Angiography and preperitoneal pelvic packing
AbstractObjectives(1) To identify the factors predicting arterial extravasation in pelvic trauma and (2) to assess the efficacy of preperitoneal pelvic packing (PPP) in controlling arterial hemorrhage.MethodsInstitutional review board approved the retrospective study of 139 consecutive pelvic trauma patients who underwent angiographic intervention with or without prior PPP between January 2011 and December 2016. Patient demographics and presenting characteristics were recorded. Both groups of patients were combined for analysis of predictors for arterial extravasation using univariate logistic regression followed by multiv...
Source: European Radiology - June 9, 2020 Category: Radiology Source Type: research

Validation of thoracic aortic dimensions on ECG-triggered SSFP as alternative to contrast-enhanced MRA
AbstractObjectivesAssessment of thoracic aortic dimensions with non-ECG-triggered contrast-enhanced magnetic resonance angiography (CE-MRA) is accompanied with motion artefacts and requires gadolinium. To avoid both motion artefacts and gadolinium administration, we evaluated the similarity and reproducibility of dimensions measured on ECG-triggered, balanced steady-state free precession (SSFP) MRA as alternative to CE-MRA.MethodsAll patients, with varying medical conditions, referred for thoracic aortic examination between September 2016 and March 2018, who underwent non-ECG-triggered CE-MRA and SSFP-MRA (1.5 T) were retr...
Source: European Radiology - June 7, 2020 Category: Radiology Source Type: research

The Kaiser score reliably excludes malignancy in benign contrast-enhancing lesions classified as BI-RADS 4 on breast MRI high-risk screening exams
ConclusionsThe use of Kaiser score in high-risk MRI screening reliably excludes malignancy in more than 45% of contrast-enhancing lesions classified as BI-RADS 4.Key Points•The Kaiser score shows high diagnostic accuracy in identifying malignancy in contrast-enhancing lesions in patients undergoing high-risk screening for breast cancer.•The application of the Kaiser score may avoid> 45% of unnecessary breast biopsies in high-risk patients.•The Kaiser score aids decision-making in high-risk breast cancer MRI screening programs. (Source: European Radiology)
Source: European Radiology - June 6, 2020 Category: Radiology Source Type: research

The association between patellar tendon stiffness measured with shear-wave elastography and patellar tendinopathy —a case-control study
AbstractObjectives(1) To determine the association between patellar tendon stiffness and the presence of patellar tendinopathy (PT). (2) To evaluate the reliability of shear-wave elastography (SWE).MethodsParticipants were consecutively enrolled between January 2017 and June 2019. PT was diagnosed clinically and confirmed by either grayscale US or power Doppler US, or both. Controls had no history of anterior knee pain and no clinical signs of PT. Patellar tendon stiffness (kilopascal, kPa) was assessed using SWE. Logistic regression was used to estimate adjusted odds ratios (ORs) and 95% confidence intervals (CIs). Reliab...
Source: European Radiology - June 4, 2020 Category: Radiology Source Type: research