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European Radiology

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https://www.readbyqxmd.com/read/28726121/bone-marrow-oedema-predicts-bone-collapse-in-paediatric-and-adolescent-leukaemia-patients-with-corticosteroid-induced-osteonecrosis
#1
Ashok Joseph Theruvath, Preeti Arun Sukerkar, Shanshan Bao, Jarrett Rosenberg, Sandra Luna-Fineman, Sandhya Kharbanda, Heike Elisabeth Daldrup-Link
OBJECTIVES: Corticosteroid treatment of paediatric leukaemia patients can lead to osteonecrosis (ON). We determined whether bone marrow oedema (BME) is an early sign of progressive ON and eventual bone collapse. METHODS: In a retrospective study, two radiologists reviewed MR imaging characteristics of 47 early stage epiphyseal ON in 15 paediatric and adolescent leukaemia patients. Associations between BME on initial imaging studies and subchondral fracture, disease progression and bone collapse were assessed by Cochran-Mantel-Haenszel tests...
July 19, 2017: European Radiology
https://www.readbyqxmd.com/read/28726120/magnetic-resonance-imaging-for-detection-of-parametrial-invasion-in-cervical-cancer-an-updated-systematic-review-and-meta-analysis-of-the-literature-between-2012-and-2016
#2
Sungmin Woo, Chong Hyun Suh, Sang Youn Kim, Jeong Yeon Cho, Seung Hyup Kim
OBJECTIVE: To review the diagnostic performance of MRI for detection of parametrial invasion (PMI) in cervical cancer patients. METHODS: MEDLINE and EMBASE databases were searched for studies providing diagnostic performance of MRI for detecting PMI in patients with cervical cancer. Studies published between 2012 and 2016 using surgico-pathological results as reference standard were included. Study quality was evaluated using QUADAS-2. Sensitivity and specificity of all studies were calculated...
July 19, 2017: European Radiology
https://www.readbyqxmd.com/read/28726119/a-cost-effectiveness-analysis-of-the-diagnostic-strategies-for-differentiating-focal-nodular-hyperplasia-from-hepatocellular-adenoma
#3
Chong Hyun Suh, Kyung Won Kim, Seong Ho Park, Sangjin Shin, Jeonghoon Ahn, Junhee Pyo, Atul B Shinagare, Katherine M Krajewski, Nikhil H Ramaiya
OBJECTIVES: We evaluated the cost-effectiveness of a gadoxetic acid-enhanced MRI (EOB-MRI) strategy compared with conventional MRI strategy and biopsy to differentiate focal nodular hyperplasia (FNH) from hepatocellular adenoma (HCA). METHODS: A decision tree model was constructed to compare the cost-effectiveness of EOB-MRI, conventional MRI with extracellular contrast agents, and biopsy as the initial diagnostic modality in patients with incidentally detected focal liver lesions suspected of being FNH or HCA...
July 19, 2017: European Radiology
https://www.readbyqxmd.com/read/28726118/epidural-steroid-injection-related-events-requiring-hospitalisation-or-emergency-room-visits-among-52-935-procedures-performed-at-a-single-centre
#4
Joon Woo Lee, Eugene Lee, Guen Young Lee, Yusuhn Kang, Joong Mo Ahn, Heung Sik Kang
OBJECTIVES: To analyse the incidence and type of epidural steroid injection (ESI)-related adverse events, including procedure-related complications and drug-related systemic effects requiring hospitalisation or emergency room (ER) visits. METHODS: This study included 52,935 ESI procedures performed in 22,059 patients in our department from March 2004 to February 2016. Of these, we retrospectively reviewed the cases of 1570 patients (1713 procedures) who were hospitalised or visited the ER within 1 month after ESI...
July 19, 2017: European Radiology
https://www.readbyqxmd.com/read/28710583/prototype-metal-artefact-reduction-algorithm-in-flat-panel-computed-tomography-evaluation-in-patients-undergoing-transarterial-hepatic-radioembolisation
#5
Qeumars Mustafa Hamie, Adrian Raoul Kobe, Leif Mietzsch, Michael Manhart, Gilbert Dominique Puippe, Thomas Pfammatter, Roman Guggenberger
OBJECTIVE: To investigate the effect of an on-site prototype metal artefact reduction (MAR) algorithm in cone-beam CT-catheter-arteriography (CBCT-CA) in patients undergoing transarterial radioembolisation (RE) of hepatic masses. METHODS AND MATERIALS: Ethical board approved retrospective study of 29 patients (mean 63.7±13.7 years, 11 female), including 16 patients with arterial metallic coils, undergoing CBCT-CA (8s scan, 200 degrees rotation, 397 projections)...
July 14, 2017: European Radiology
https://www.readbyqxmd.com/read/28710582/comparison-of-digital-mammography-and-digital-breast-tomosynthesis-in-the-detection-of-architectural-distortion
#6
Elizabeth H Dibble, Ana P Lourenco, Grayson L Baird, Robert C Ward, A Stanley Maynard, Martha B Mainiero
OBJECTIVES: To compare interobserver variability (IOV), reader confidence, and sensitivity/specificity in detecting architectural distortion (AD) on digital mammography (DM) versus digital breast tomosynthesis (DBT). METHODS: This IRB-approved, HIPAA-compliant reader study used a counterbalanced experimental design. We searched radiology reports for AD on screening mammograms from 5 March 2012-27 November 2013. Cases were consensus-reviewed. Controls were selected from demographically matched non-AD examinations...
July 14, 2017: European Radiology
https://www.readbyqxmd.com/read/28710581/validation-of-a-model-for-predicting-smear-positive-active-pulmonary-tuberculosis-in-patients-with-initial-acid-fast-bacilli-smear-negative-sputum
#7
Jun -Jun Yeh
OBJECTIVES: The objective of this study was to develop a predictive model for final smear-positive (SP) active pulmonary tuberculosis (aPTB) in patients with initial negative acid fast bacilli (AFB) sputum smears (iSN-SP-aPTB) based on high-resolution computed tomography (HRCT). METHOD AND MATERIALS: Eighty (126, 21) patients of iSN-SP-aPTB and 402 (459, 876) patients of non-initial positive acid fast bacilli (non-iSP) pulmonary disease without iSN-SP-aPTB were included in a derivation (validation, prospective) cohort...
July 14, 2017: European Radiology
https://www.readbyqxmd.com/read/28710580/assessment-of-acute-kidney-injury-with-t1-mapping-mri-following-solid-organ-transplantation
#8
Matti Peperhove, Van Dai Vo Chieu, Mi-Sun Jang, Marcel Gutberlet, Dagmar Hartung, Susanne Tewes, Gregor Warnecke, Christiane Fegbeutel, Axel Haverich, Wilfried Gwinner, Frank Lehner, Jan Hinrich Bräsen, Hermann Haller, Frank Wacker, Faikah Gueler, Katja Hueper
OBJECTIVES: To evaluate T1 mapping as a non-invasive, functional MRI biomarker in patients shortly after solid organ transplantation to detect acute postsurgical kidney damage and to correlate T1 times with renal function. METHODS: 101 patients within 2 weeks after solid organ transplantation (49 kidney transplantation, 52 lung transplantation) and 14 healthy volunteers were examined by MRI between July 2012 and April 2015 using the modified Look-Locker inversion recovery (MOLLI) sequence...
July 14, 2017: European Radiology
https://www.readbyqxmd.com/read/28710579/magnetic-resonance-neurography-current-perspectives-and-literature-review
#9
REVIEW
Avneesh Chhabra, Ananth J Madhuranthakam, Gustav Andreisek
Magnetic resonance neurography (also called MRN or MR neurography) refers to MR imaging dedicated to the peripheral nerves. It is a technique that enhances selective multiplanar visualisation of the peripheral nerve and pathology by encompassing a combination of two-dimensional, three-dimensional and diffusion imaging pulse sequences. Referring physicians who seek imaging techniques that can depict and diagnose peripheral nerve pathologies superior to conventional MR imaging are driving the demand for MRN. This article reviews the pathophysiology of peripheral nerves in common practice scenarios, technical considerations of MRN, current indications of MRN, normal and abnormal neuromuscular appearances, and imaging pitfalls...
July 14, 2017: European Radiology
https://www.readbyqxmd.com/read/28710578/four-dimensional-flow-mri-of-stented-versus-stentless-aortic-valve-bioprostheses
#10
Floortje van Kesteren, Laurens W Wollersheim, Jan Baan, Aart J Nederveen, Abdullah Kaya, S Matthijs Boekholdt, Bas A de Mol, Pim van Ooij, R Nils Planken
OBJECTIVES: To evaluate aortic velocity, wall shear stress (WSS) and viscous energy loss (EL) of stented and stentless bioprostheses using 4D flow MRI 1 year after surgical aortic valve replacement. METHODS: For this cross-sectional study 28 patients with stented (n = 14) or stentless (n = 14) bioprosthesis underwent non-contrast-enhanced 4D-flow MRI at 1.5 T. Analyses included a comparison of velocity, WSS and EL in the ascending aorta during peak systole for both spatially averaged values and a comparison of local differences using per-voxel analysis...
July 14, 2017: European Radiology
https://www.readbyqxmd.com/read/28710577/detection-of-small-bowel-tumours-with-ct-enteroclysis-using-carbon-dioxide-and-virtual-enteroscopy-a-preliminary-study
#11
Anthony Dohan, Mourad Boudiaf, Xavier Dray, Elia Samaha, Christophe Cellier, Marine Camus, Clarisse Eveno, Raphael Dautry, Philippe Soyer
PURPOSE: The aim of this prospective study was to evaluate the feasibility, tolerance and performance of virtual enteroscopy (VE) using carbon dioxide for small-bowel distension in patients with suspected small-bowel tumours (SBTs). PATIENTS AND METHODS: After IRB approval, 17 patients with suspected SBTs were prospectively included. Radiation dose was compared to 34 matched patients (2 for 1) for age, gender and body weight, who had undergone CT-enteroclysis with neutral contrast (CTE)...
July 14, 2017: European Radiology
https://www.readbyqxmd.com/read/28710576/the-effect-of-iodine-uptake-on-radiation-dose-absorbed-by-patient-tissues-in-contrast-enhanced-ct-imaging-implications-for-ct-dosimetry
#12
Kostas Perisinakis, Antonis Tzedakis, Kostas Spanakis, Antonios E Papadakis, Adam Hatzidakis, John Damilakis
OBJECTIVES: To investigate the effect of iodine uptake on tissue/organ absorbed doses from CT exposure and its implications in CT dosimetry. METHODS: The contrast-induced CT number increase of several radiosensitive tissues was retrospectively determined in 120 CT examinations involving both non-enhanced and contrast-enhanced CT imaging. CT images of a phantom containing aqueous solutions of varying iodine concentration were obtained. Plots of the CT number increase against iodine concentration were produced...
July 14, 2017: European Radiology
https://www.readbyqxmd.com/read/28710575/software-based-risk-stratification-of-pulmonary-adenocarcinomas-manifesting-as-pure-ground-glass-nodules-on-computed-tomography
#13
Ursula Nemec, Benedikt H Heidinger, Kevin R Anderson, Michael S Westmore, Paul A VanderLaan, Alexander A Bankier
OBJECTIVES: To assess the performance of the "Computer-Aided Nodule Assessment and Risk Yield" (CANARY) software in the differentiation and risk assessment of histological subtypes of lung adenocarcinomas manifesting as pure ground glass nodules on computed tomography (CT). METHODS: 64 surgically resected and histologically proven adenocarcinomas manifesting as pure ground-glass nodules on CT were assessed using CANARY software, which classifies voxel-densities into three risk components (low, intermediate, and high risk)...
July 14, 2017: European Radiology
https://www.readbyqxmd.com/read/28702800/anterolateral-ligament-injuries-in-knees-with-an-anterior-cruciate-ligament-tear-contribution-of-ultrasonography-and-mri
#14
Marie Faruch Bilfeld, Etienne Cavaignac, Karine Wytrykowski, Olivia Constans, Franck Lapègue, Hélène Chiavassa Gandois, Ahmed Larbi, Nicolas Sans
OBJECTIVES: To describe the pathological appearance of the anterolateral ligament (ALL) on US and MRI in knees with an anterior cruciate ligament (ACL) tear. METHODS: This prospective study included 30 patients who had a suspected acute ACL tear. Their injured and contralateral knees were evaluated with radiography, US and MRI. Two radiologists evaluated the ALL on the MRI and US examinations. Agreement between these examiners' findings was evaluated with Cohen's kappa...
July 12, 2017: European Radiology
https://www.readbyqxmd.com/read/28702799/greater-occipital-nerve-infiltration-under-mr-guidance-feasibility-study-and-preliminary-results
#15
Adrian Kastler, Romain Perolat, Bruno Kastler, Caroline Maindet-Dominici, Jan Fritz, Alim Louis Benabid, Stephan Chabardes, Alexandre Krainik
OBJECTIVE: To assess the feasibility of greater occipital nerve (GON) intermediate site infiltration with MRI guidance. METHODS: Eleven consecutive patients suffering from chronic refractory cranio-facial pain who underwent 16 GON infiltrations were included in this prospective study. All of the procedures were performed on an outpatient basis in the research facility of our institution, with a 1.5 T scanner. The fatty space between inferior obliquus and semispinalis muscles at C1-C2 level was defined as the target...
July 12, 2017: European Radiology
https://www.readbyqxmd.com/read/28698944/petra-msvat-space-and-semac-sequences-for-metal-artefact-reduction-in-dental-mr-imaging
#16
Tim Hilgenfeld, Marcel Prager, Alexander Heil, Franz Sebastian Schwindling, Mathias Nittka, David Grodzki, Peter Rammelsberg, Martin Bendszus, Sabine Heiland
OBJECTIVES: Dental MRI is often impaired by artefacts due to metallic dental materials. Several sequences were developed to reduce susceptibility artefacts. Here, we evaluated a set of sequences for artefact reduction for dental MRI for the first time. METHODS: Artefact volume, signal-to-noise ratio (SNR) and image quality were assessed on a 3-T MRI for pointwise encoding time reduction with radial acquisition (PETRA), multiple-slab acquisition with view angle tilting gradient, based on a sampling perfection with application-optimised contrasts using different flip angle evolution (SPACE) sequence (MSVAT-SPACE), slice-encoding for metal-artefact correction (SEMAC) and compared to a standard SPACE and a standard turbo-spin-echo (TSE) sequence...
July 11, 2017: European Radiology
https://www.readbyqxmd.com/read/28698943/noninvasive-electrical-conductivity-measurement-by-mri-a-test-of-its-validity-and-the-electrical-conductivity-characteristics-of-glioma
#17
Khin Khin Tha, Ulrich Katscher, Shigeru Yamaguchi, Christian Stehning, Shunsuke Terasaka, Noriyuki Fujima, Kohsuke Kudo, Ken Kazumata, Toru Yamamoto, Marc Van Cauteren, Hiroki Shirato
OBJECTIVES: This study noninvasively examined the electrical conductivity (σ) characteristics of diffuse gliomas using MRI and tested its validity. METHODS: MRI including a 3D steady-state free precession (3D SSFP) sequence was performed on 30 glioma patients. The σ maps were reconstructed from the phase images of the 3D SSFP sequence. The σ histogram metrics were extracted and compared among the contrast-enhanced (CET) and noncontrast-enhanced tumour components (NCET) and normal brain parenchyma (NP)...
July 11, 2017: European Radiology
https://www.readbyqxmd.com/read/28698942/mri-of-the-scrotum-recommendations-of-the-esur-scrotal-and-penile-imaging-working-group
#18
Athina C Tsili, Michele Bertolotto, Ahmet Tuncay Turgut, Vikram Dogra, Simon Freeman, Laurence Rocher, Jane Belfield, Michal Studniarek, Alexandra Ntorkou, Lorenzo E Derchi, Raymond Oyen, Parvati Ramchandani, Mustafa Secil, Jonathan Richenberg
OBJECTIVES: The Scrotal and Penile Imaging Working Group (SPI-WG) appointed by the board of the European Society of Urogenital Radiology (ESUR) has produced recommendations for magnetic resonance imaging (MRI) of the scrotum. METHODS: The SPI-WG searched for original and review articles published before September 2016 using the Pubmed and Medline databases. Keywords used were 'magnetic resonance imaging', 'testis or testicle or testicular', 'scrotum', 'intratesticular', 'paratesticular', 'extratesticular' 'diffusion-weighted', 'dynamic MRI'...
July 11, 2017: European Radiology
https://www.readbyqxmd.com/read/28695359/radiation-dose-reduction-for-ct-assessment-of-urolithiasis-using-iterative-reconstruction-a-prospective-intra-individual-study
#19
Annemarie M den Harder, Martin J Willemink, Pieter J van Doormaal, Frank J Wessels, M T W T Lock, Arnold M R Schilham, Ricardo P J Budde, Tim Leiner, Pim A de Jong
OBJECTIVE: To assess the performance of hybrid (HIR) and model-based iterative reconstruction (MIR) in patients with urolithiasis at reduced-dose computed tomography (CT). METHODS: Twenty patients scheduled for unenhanced abdominal CT for follow-up of urolithiasis were prospectively included. Routine dose acquisition was followed by three low-dose acquisitions at 40%, 60% and 80% reduced doses. All images were reconstructed with filtered back projection (FBP), HIR and MIR...
July 10, 2017: European Radiology
https://www.readbyqxmd.com/read/28695358/retained-executive-abilities-in-mild-cognitive-impairment-are-associated-with-increased-white-matter-network-connectivity
#20
Danielle C Farrar, Asim Z Mian, Andrew E Budson, Mark B Moss, Bang Bon Koo, Ronald J Killiany
PURPOSE: To describe structural network differences in individuals with mild cognitive impairment (MCI) with high versus low executive abilities, as reflected by measures of white matter connectivity using diffusion tensor imaging (DTI). MATERIALS AND METHODS: This was a retrospective, cross-sectional study. Of the 128 participants from the Alzheimer's Disease Neuroimaging Initiative database who had both a DTI scan as well as a diagnosis of MCI, we used an executive function score to classify the top 15 scoring patients as high executive ability, and the bottom-scoring 16 patients as low executive ability...
July 10, 2017: European Radiology
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