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European Radiology

Pierre-Alexandre Poletti, Minerva Becker, Christoph D Becker, Alice Halfon Poletti, Olivier T Rutschmann, Habib Zaidi, Thomas Perneger, Alexandra Platon
OBJECTIVES: To determine if radiation dose delivered by contrast-enhanced CT (CECT) for acute abdominal pain can be reduced to the dose administered in abdominal radiography (<2.5 mSv) using low-dose CT (LDCT) with iterative reconstruction algorithms. METHODS: One hundred and fifty-one consecutive patients requiring CECT for acute abdominal pain were included, and their body mass index (BMI) was calculated. CECT was immediately followed by LDCT. LDCT series was processed using 1) 40% iterative reconstruction algorithm blended with filtered back projection (LDCT-IR-FBP) and 2) model-based iterative reconstruction algorithm (LDCT-MBIR)...
January 12, 2017: European Radiology
Jules J Claus, Salka S Staekenborg, Dana C Holl, Jelmen J Roorda, Jacqueline Schuur, Pieter Koster, Caroline E M Tielkes, Philip Scheltens
OBJECTIVE: To provide age-specific medial temporal lobe atrophy (MTA) cut-off scores for routine clinical practice as marker for Alzheimer's disease (AD). METHODS: Patients with AD (n = 832, mean age 81.8 years) were compared with patients with subjective cognitive impairment (n = 333, mean age 71.8 years) in a large single-centre memory clinic. Mean of right and left MTA scores was determined with visual rating (Scheltens scale) using CT (0, no atrophy to 4, severe atrophy)...
January 12, 2017: European Radiology
Sohi Bae, Ho-Joon Lee, Kyunghwa Han, Yae-Won Park, Yoon Seong Choi, Sung Soo Ahn, Jinna Kim, Seung-Koo Lee
OBJECTIVES: To determine the relationship between the number of administrations of various gadolinium-based contrast agents (GBCAs) and increased T1 signal intensity in the globus pallidus (GP) and dentate nucleus (DN). METHODS: This retrospective study included 122 patients who underwent double-dose GBCA-enhanced magnetic resonance imaging. Two radiologists calculated GP-to-thalamus (TH) signal intensity ratio, DN-to-pons signal intensity ratio and relative change (Rchange) between the baseline and final examinations...
January 12, 2017: European Radiology
J J Vehreschild, C P Heussel, A H Groll, M J G T Vehreschild, G Silling, G Würthwein, M Brecht, O A Cornely
BACKGROUND: Serial chest CT is the standard of care to establish treatment success in invasive pulmonary aspergillosis (IPA). Data are lacking how response should be defined. METHODS: Digital CT images from a clinical trial on treatment of IPA were re-evaluated and compared with available biomarkers. Total volume of pneumonia was added up after manual measurement of each lesion, followed by statistical analysis. RESULTS: One-hundred and ninety CT scans and 309 follow-up datasets from 40 patients were available for analysis...
January 12, 2017: European Radiology
Lu-Yao Zhou, Hong Jiang, Quan-Yuan Shan, Dong Chen, Xiao-Na Lin, Bao-Xian Liu, Xiao-Yan Xie
OBJECTIVES: To prospectively assess the diagnostic performance of supersonic shear wave elastography (SSWE) in identifying biliary atresia (BA) among infants with conjugated hyperbilirubinaemia by comparing this approach with grey-scale ultrasonography (US). METHODS: Forty infants were analysed as the control group to determine normal liver stiffness values. The use of SSWE values for identifying BA was investigated in 172 infants suspected of having BA, and results were compared with the results obtained by grey-scale US...
January 12, 2017: European Radiology
Hye Mi Gweon, Nariya Cho, Soo-Yeon Kim, Hye Ryoung Koo, Mirinae Seo, Ajung Chu, Eun Ju Son
OBJECTIVE: To retrospectively evaluate characteristics of and determine appropriate follow-up recommendations for BI-RADS category 3 lesions detected in preoperative MRI of breast cancer patients. METHODS: BI-RADS category 3 assessments were identified from the breast MRI database for 5,110 consecutive breast cancer patients who had undergone preoperative MRI and surgery. Patient and lesion characteristics, malignancy rate, and interval between lesion detection and cancer diagnosis were analysed...
January 12, 2017: European Radiology
David Manners, Patrick Wong, Conor Murray, Joelin Teh, Yi Jin Kwok, Nick de Klerk, Helman Alfonso, Peter Franklin, Alison Reid, A W Bill Musk, Fraser J H Brims
OBJECTIVES: The correlation between ultra low dose computed tomography (ULDCT)-detected parenchymal lung changes and pulmonary function abnormalities is not well described. This study aimed to determine the relationship between ULDCT-detected interstitial lung disease (ILD) and measures of pulmonary function in an asbestos-exposed population. METHODS: Two thoracic radiologists independently categorised prone ULDCT scans from 143 participants for ILD appearances as absent (score 0), probable (1) or definite (2) without knowledge of asbestos exposure or lung function...
January 12, 2017: European Radiology
Julien G Cohen, Hyungjin Kim, Su Bin Park, Bram van Ginneken, Gilbert R Ferretti, Chang Hyun Lee, Jin Mo Goo, Chang Min Park
OBJECTIVES: To evaluate the differences between filtered back projection (FBP) and model-based iterative reconstruction (MBIR) algorithms on semi-automatic measurements in subsolid nodules (SSNs). METHODS: Unenhanced CT scans of 73 SSNs obtained using the same protocol and reconstructed with both FBP and MBIR algorithms were evaluated by two radiologists. Diameter, mean attenuation, mass and volume of whole nodules and their solid components were measured. Intra- and interobserver variability and differences between FBP and MBIR were then evaluated using Bland-Altman method and Wilcoxon tests...
January 5, 2017: European Radiology
Andrea S Klauser, Mathias Pamminger, Ethan J Halpern, Mohamed M H Abd Ellah, Bernhard Moriggl, Mihra S Taljanovic, Christian Deml, Judit Sztankay, Guenther Klima, Werner R Jaschke
PURPOSE: To compare agreement between conventional B-mode ultrasound (US) and compression sonoelastography (SEL) of the common extensor tendons of the elbow with histological evaluation. MATERIALS AND METHODS: Twenty-six common extensor tendons were evaluated in 17 cadavers (11 females, median age 85 years and 6 males, median age 80 years). B-mode US was graded into: Grade 1, homogeneous fibrillar pattern; grade 2, hypoechoic areas and/or calcifications <30%; and grade 3 > 30%...
January 5, 2017: European Radiology
Ullrich G Mueller-Lisse, Sophie Murer, Ulrike L Mueller-Lisse, Marissa Kuhn, Juergen Scheidler, Michael Scherr
OBJECTIVES: To apply an easy-to-assemble phantom substitute for human prostates in T2-weighted magnetic resonance imaging (T2WI), diffusion-weighted imaging (DWI) and 3D magnetic resonance spectroscopy (MRS). METHODS: Kiwi fruit were fixed with gel hot and cold compress packs on two plastic nursery pots, separated by a plastic plate, and submerged in tap water inside a 1-L open-spout plastic watering can for T2WI (TR/TE 7500/101 ms), DWI (5500/61 ms, ADC b50-800 s/mm(2) map) and MRS (940/145 ms) at 3...
January 5, 2017: European Radiology
Eui Jin Hwang, Jin Mo Goo, Jihye Kim, Sang Joon Park, Soyeon Ahn, Chang Min Park, Yeong-Gil Shin
OBJECTIVES: To develop a prediction model for the variability range of lung nodule volumetry and validate the model in detecting nodule growth. MATERIALS AND METHODS: For model development, 50 patients with metastatic nodules were prospectively included. Two consecutive CT scans were performed to assess volumetry for 1,586 nodules. Nodule volume, surface voxel proportion (SVP), attachment proportion (AP) and absolute percentage error (APE) were calculated for each nodule and quantile regression analyses were performed to model the 95% percentile of APE...
January 3, 2017: European Radiology
Zhongyuan Yin, Zhiwen Liang, Pengcheng Li, Qiong Wang
PURPOSE: To retrospectively evaluate the diagnostic performance and complications of a CT-guided core needle cutting biopsy of mediastinal nodes through a transpulmonary approach. MATERIALS AND METHODS: From January 2009 to December 2014, we used a coaxial positioning system and an 18G cutting-type biopsy device to perform CT-guided percutaneous transpulmonary needle biopsies of mediastinal nodes for 127 patients. The diagnostic performance, complication rate, influencing factors, distribution of mediastinal nodes and pathological diagnoses were investigated...
January 3, 2017: European Radiology
David S Gierada, Paul F Pinsky, Fenghai Duan, Kavita Garg, Eric M Hart, Ella A Kazerooni, Hrudaya Nath, Jubal R Watts, Denise R Aberle
OBJECTIVES: This study retrospectively analyses the screening CT examinations and outcomes of the National Lung Screening Trial (NLST) participants who had interval lung cancer diagnosed within 1 year after a negative CT screen and before the next annual screen. METHODS: The screening CTs of all 44 participants diagnosed with interval lung cancer (cases) were matched with negative CT screens of participants who did not develop lung cancer (controls). A majority consensus process was used to classify each CT screen as positive or negative according to the NLST criteria and to estimate the likelihood that any abnormalities detected retrospectively were due to lung cancer...
January 3, 2017: European Radiology
Julia Furtner, Anna S Berghoff, Omar M Albtoush, Ramona Woitek, Ulrika Asenbaum, Daniela Prayer, Georg Widhalm, Brigitte Gatterbauer, Karin Dieckmann, Peter Birner, Bernadette Aretin, Rupert Bartsch, Christoph C Zielinski, Veronika Schöpf, Matthias Preusser
OBJECTIVES: To evaluate the prognostic relevance of temporal muscle thickness (TMT) in brain metastasis patients. METHODS: We retrospectively analysed TMT on magnetic resonance (MR) images at diagnosis of brain metastasis in two independent cohorts of 188 breast cancer (BC) and 247 non-small cell lung cancer (NSCLC) patients (overall: 435 patients). RESULTS: Survival analysis using a Cox regression model showed a reduced risk of death by 19% with every additional millimetre of baseline TMT in the BC cohort and by 24% in the NSCLC cohort...
January 3, 2017: European Radiology
Giovanni Mauri, Luca Maria Sconfienza, Lorenzo Carlo Pescatori, Maria Paola Fedeli, Marco Alì, Giovanni Di Leo, Francesco Sardanelli
OBJECTIVES: To systematically review studies concerning imaging-guided minimally-invasive breast cancer treatments. METHODS: An online database search was performed for English-language articles evaluating percutaneous breast cancer ablation. Pooled data and 95% confidence intervals (CIs) were calculated. Technical success, technique efficacy, minor and major complications were analysed, including ablation technique subgroup analysis and effect of tumour size on outcome...
January 3, 2017: European Radiology
Akos Varga-Szemes, Rob J van der Geest, U Joseph Schoepf, Bruce S Spottiswoode, Carlo N De Cecco, Giuseppe Muscogiuri, Julian L Wichmann, Stefanie Mangold, Stephen R Fuller, Pal Maurovich-Horvat, Bela Merkely, Sheldon E Litwin, Rozemarijn Vliegenthart, Pal Suranyi
OBJECTIVES: To evaluate the influence of inversion time (TI) on the precision of myocardial late gadolinium enhancement (LGE) quantification using synthetic inversion recovery (IR) imaging in patients with myocardial infarction (MI). METHODS: Fifty-three patients with suspected prior MI underwent 1.5-T cardiac MRI with conventional magnitude (MagIR) and phase-sensitive IR (PSIR) LGE imaging and T1 mapping at 15 min post-contrast. T1-based synthetic MagIR and PSIR images were calculated with a TI ranging from -100 to +150 ms at 5-ms intervals relative to the optimal TI (TI0)...
January 3, 2017: European Radiology
Julius Matthias Weinrich, Roland Diel, Markus Sauer, Frank Oliver Henes, Karen Meywald-Walter, Gerhard Adam, Gerhard Schön, Peter Bannas
OBJECTIVE: Our aim was to determine the prevalence of tuberculosis (TB), the number needed to screen (NNS), and the diagnostic accuracy of chest X-ray (CXR) screening to detect active pulmonary TB during the 2015 European refugee crisis. MATERIALS AND METHODS: We evaluated data of all refugees who underwent CXR screening in a single-centre of one German metropolitan area in 2015. We determined the prevalence of TB, NNS, and accuracy of CXR to detect active pulmonary TB...
January 3, 2017: European Radiology
Mikinobu Takeuchi, Norimitsu Wakao, Atsuhiko Hirasawa, Kenta Murotani, Mitsuhiro Kamiya, Koji Osuka, Masakazu Takayasu
OBJECTIVE: This study investigated the diagnostic accuracy of the difference in the cross-sectional areas (CSAs) of affected cervical nerve roots (NRs) for diagnosing cervical radiculopathy (CR). METHODS: In total, 102 CR patients and 219 healthy volunteers were examined with ultrasound. The CSA of the cervical NR at each level was measured on the affected side and the contralateral side in CR patients by blinded ultrasonographic technicians. The difference between the CSAs of CR patients and normal volunteers and the difference in the laterality of CSA at the same affected level (ΔCSA) were calculated for each cervical level...
January 3, 2017: European Radiology
Grégoire Boulouis, Marc Antoine Labeyrie, Jean Raymond, Christine Rodriguez-Régent, Anne Claire Lukaszewicz, Damien Bresson, Wagih Ben Hassen, Denis Trystram, Jean Francois Meder, Catherine Oppenheim, Olivier Naggara
OBJECTIVES: To examine the clinical outcome of aneurysmal subarachnoid haemorrhage (aSAH) patients exposed to cerebral vasospasm (CVS)-targeted treatments in a meta-analysis and to evaluate the efficacy of intra-arterial (IA) approaches in patients with severe/refractory vasospasm. METHODS: Randomised controlled trials, prospective and retrospective observational studies reporting clinical outcomes of aSAH patients exposed to CVS targeted treatments, published between 2006-2016 were searched using PubMed, EMBASE and the Cochrane Library...
December 21, 2016: European Radiology
Rogier R Wildeboer, Arnoud W Postema, Libertario Demi, Maarten P J Kuenen, Hessel Wijkstra, Massimo Mischi
OBJECTIVES: The aim of this study is to improve the accuracy of dynamic contrast-enhanced ultrasound (DCE-US) for prostate cancer (PCa) localization by means of a multiparametric approach. MATERIALS AND METHODS: Thirteen different parameters related to either perfusion or dispersion were extracted pixel-by-pixel from 45 DCE-US recordings in 19 patients referred for radical prostatectomy. Multiparametric maps were retrospectively produced using a Gaussian mixture model algorithm...
December 21, 2016: European Radiology
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