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Radiology

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https://www.readbyqxmd.com/read/28430554/notice-of-retraction-role-of-cerebrospinal-fluid-in-spaceflight-induced-ocular-changes-and-visual-impairment-in-astronauts
#1
Noam Alperin, Ahmet M Bagci, Carlos J Oliu, Sang H Lee, Byron L Lam
Notice of retraction: the article "Role of Cerebral Spinal Fluid in Space Flight Induced Ocular Changes and Visual Impairment in Astronauts" by Alperin et al This article has been retracted due to security concerns raised by NASA, the sponsoring agency. (©) RSNA, 2017.
October 16, 2017: Radiology
https://www.readbyqxmd.com/read/29023219/predictors-of-outcome-in-patients-with-pediatric-intracerebral-hemorrhage-development-and-validation-of-a-modified-score
#2
Alexis Guédon, Thomas Blauwblomme, Grégoire Boulouis, Camille Jousset, Philippe Meyer, Manoëlle Kossorotof, Marie Bourgeois, Stéphanie Puget, Michel Zerah, Catherine Oppenheim, Jean-François Meder, Nathalie Boddaert, Francis Brunelle, Christian Sainte-Rose, Olivier Naggara
Purpose To propose and validate a modified pediatric intracerebral hemorrhage (PICH) (mPICH) score and to compare its association with functional outcome to that of the original PICH score. Materials and Methods Data from prospectively included patients were retrospectively analyzed. Consecutive patients with nontraumatic PICH who had undergone clinical follow-up were included. The study population was divided into a development cohort (2008-2012, n = 100) and a validation cohort (2013-2016, n = 43). An mPICH score was developed after variables associated with poor outcome were identified at multivariate analysis (King's Outcome Scale for Childhood Head Injury score < 5a) in the development cohort...
October 12, 2017: Radiology
https://www.readbyqxmd.com/read/29019450/cataract-risk-in-a-cohort-of-u-s-radiologic-technologists-performing-nuclear-medicine-procedures
#3
Marie-Odile Bernier, Neige Journy, Daphnee Villoing, Michele M Doody, Bruce H Alexander, Martha S Linet, Cari M Kitahara
Purpose To estimate the risk of cataract in a cohort of nuclear medicine (NM) radiologic technologists on the basis of their work histories and radiation protection practices. Materials and Methods In the years 2003-2005 and 2012-2013, 42 545 radiologic technologists from a U.S. prospective study completed questionnaires in which they provided information regarding their work histories and cataract histories. Cox proportional hazards models, stratified according to birth-year cohort (born before 1940 or born in 1940 or later) and adjusted for age, sex, and race, were used to estimate hazard ratios (HRs) for the risk of cataract in radiologic technologists according to NM work history practices according to decade...
October 11, 2017: Radiology
https://www.readbyqxmd.com/read/29019449/middle-meningeal-artery-embolization-for-chronic-subdural-hematoma
#4
Seung Pil Ban, Gyojun Hwang, Hyoung Soo Byoun, Tackeun Kim, Si Un Lee, Jae Seung Bang, Jung Ho Han, Chae-Yong Kim, O-Ki Kwon, Chang Wan Oh
Purpose To evaluate the effect of middle meningeal artery (MMA) embolization on chronic subdural hematoma (CSDH) and compare the treatment outcomes of MMA embolization and conventional treatment. Materials and Methods All consecutive patients 20 years or older with CSDH were assessed for eligibility. CSDHs with a focal location, a thickness of 10 mm or less, no mass effect, or underlying conditions were excluded. Seventy-two prospectively enrolled patients with CSDH underwent MMA embolization (embolization group; as the sole treatment in 27 [37...
October 10, 2017: Radiology
https://www.readbyqxmd.com/read/28985135/whole-body-diffusion-weighted-mr-imaging-of-iron-deposits-in-hodgkin-follicular-and-diffuse-large-b-cell-lymphoma
#5
Anne-Ségolène Cottereau, Sébastien Mulé, Chieh Lin, Karim Belhadj, Alexandre Vignaud, Christiane Copie-Bergman, Alice Boyez, Pierre Zerbib, Vania Tacher, Elodie Scherman, Corinne Haioun, Alain Luciani, Emmanuel Itti, Alain Rahmouni
Purpose To analyze the frequency and distribution of low-signal-intensity regions (LSIRs) in lymphoma lesions and to compare these to fluorodeoxyglucose (FDG) uptake and biologic markers of inflammation. Materials and Methods The authors analyzed 61 untreated patients with a bulky lymphoma (at least one tumor mass ≥7 cm in diameter). When a LSIR within tumor lesions was detected on diffusion-weighted images obtained with a b value of 50 sec/mm(2), a T2-weighted gradient-echo (GRE) sequence was performed and calcifications were searched for with computed tomography (CT)...
October 6, 2017: Radiology
https://www.readbyqxmd.com/read/28981400/clinical-outcomes-of-radiofrequency-ablation-for-early-hypovascular-hcc-a-multicenter-retrospective-study
#6
Dong Ho Lee, Jeong Min Lee, Tae Wook Kang, Hyunchul Rhim, So Yeon Kim, Yong Moon Shin, Jung Wook Seo, Moon Hyung Choi, Kyung Bun Lee
Purpose To retrospectively evaluate the clinical outcomes of radiofrequency ablation (RFA) for early hypovascular hepatocellular carcinomas (HCCs) and to compare them with those of typical hypervascular HCCs. Materials and Methods This retrospective multicenter study received institutional review board approval, with a waiver of the need to obtain informed consent. A total of 56 patients (male-to-female ratio, 40:16; mean age, 61.8 years; age range, 33-87 years) with pathologically proven early HCCs that did not meet the noninvasive diagnosis criteria and who were initially treated with RFA at one of five university-affiliated hospitals between January 2009 and December 2013 comprised the study group...
October 5, 2017: Radiology
https://www.readbyqxmd.com/read/28980887/accuracy-of-presurgical-functional-mr-imaging-for-language-mapping-of-brain-tumors-a-systematic-review-and-meta-analysis
#7
Hsu-Huei Weng, Kyle R Noll, Jason M Johnson, Sujit S Prabhu, Yuan-Hsiung Tsai, Sheng-Wei Chang, Yen-Chu Huang, Jiann-Der Lee, Jen-Tsung Yang, Cheng-Ta Yang, Ying-Huang Tsai, Chun-Yuh Yang, John D Hazle, Donald F Schomer, Ho-Ling Liu
Purpose To compare functional magnetic resonance (MR) imaging for language mapping (hereafter, language functional MR imaging) with direct cortical stimulation (DCS) in patients with brain tumors and to assess factors associated with its accuracy. Materials and Methods PubMed/MEDLINE and related databases were searched for research articles published between January 2000 and September 2016. Findings were pooled by using bivariate random-effects and hierarchic summary receiver operating characteristic curve models...
October 4, 2017: Radiology
https://www.readbyqxmd.com/read/28980886/features-from-computerized-texture-analysis-of-breast-cancers-at-pretreatment-mr-imaging-are-associated-with-response-to-neoadjuvant-chemotherapy
#8
Foucauld Chamming's, Yoshiko Ueno, Romuald Ferré, Ellen Kao, Anne-Sophie Jannot, Jaron Chong, Atilla Omeroglu, Benoît Mesurolle, Caroline Reinhold, Benoit Gallix
Purpose To evaluate whether features from texture analysis of breast cancers were associated with pathologic complete response (pCR) after neoadjuvant chemotherapy and to explore the association between texture features and tumor subtypes at pretreatment magnetic resonance (MR) imaging. Materials and Methods Institutional review board approval was obtained. This retrospective study included 85 patients with 85 breast cancers who underwent breast MR imaging before neoadjuvant chemotherapy between April 10, 2008, and March 12, 2015...
October 4, 2017: Radiology
https://www.readbyqxmd.com/read/28980885/percutaneous-us-guided-cholecystocholangiography-with-microbubbles-for-assessment-of-infants-with-us-findings-equivocal-for-biliary-atresia-and-gallbladder-longer-than-1-5-cm-a-pilot-study
#9
Lu-Yao Zhou, Shu-Ling Chen, Hua-Dong Chen, Yang Huang, Yu-Xin Qiu, Wei Zhong, Xiao-Yan Xie
Purpose To evaluate the feasibility of ultrasonographically (US) guided percutaneous cholecystocholangiography (PCC) for early exclusion of biliary atresia (BA) in infants suspected of having BA with equivocal US findings or indeterminate type of BA and a gallbladder longer than 1.5 cm at US. Materials and Methods This study was approved by the ethics committee; written informed parental consent was obtained. From February 2016 to December 2016, nine infants (four boys, five girls; mean age, 60.2 days; median age, 57 days; age range, 23-117 days) with conjugated hyperbilirubinemia and gallbladder longer than 1...
October 4, 2017: Radiology
https://www.readbyqxmd.com/read/28972817/free-breathing-dynamic-19-f-gas-mr-imaging-for-mapping-of-regional-lung-ventilation-in-patients-with-copd
#10
Marcel Gutberlet, Till F Kaireit, Andreas Voskrebenzev, Florian Lasch, Julia Freise, Tobias Welte, Frank Wacker, Jens M Hohlfeld, Jens Vogel-Claussen
Purpose To quantify regional lung ventilation in patients with chronic obstructive pulmonary disease (COPD) by using free-breathing dynamic fluorinated (fluorine 19 [(19)F]) gas magnetic resonance (MR) imaging. Materials and Methods In this institutional review board-approved prospective study, 27 patients with COPD were examined by using breath-hold (19)F gas wash-in MR imaging during inhalation of a normoxic fluorinated gas mixture (perfluoropropane) and by using free-breathing dynamic (19)F gas washout MR imaging after inhalation of the gas mixture was finished for a total of 25-30 L...
October 3, 2017: Radiology
https://www.readbyqxmd.com/read/28957645/real-time-correction-of-motion-and-imager-instability-artifacts-during-3d-%C3%AE-aminobutyric-acid-edited-mr-spectroscopic-imaging
#11
Eva Heckova, Michal Považan, Bernhard Strasser, Patrik Krumpolec, Petra Hnilicová, Gilbert J Hangel, Philipp A Moser, Ovidiu C Andronesi, Andre J van der Kouwe, Peter Valkovic, Barbara Ukropcova, Siegfried Trattnig, Wolfgang Bogner
Purpose To compare the involuntary head motion, frequency and B0 shim changes, and effects on data quality during real-time-corrected three-dimensional γ-aminobutyric acid-edited magnetic resonance (MR) spectroscopic imaging in subjects with mild cognitive impairment (MCI), patients with Parkinson disease (PD), and young and older healthy volunteers. Materials and Methods In this prospective study, MR spectroscopic imaging datasets were acquired at 3 T after written informed consent was obtained. Translational and rotational head movement, frequency, and B0 shim were determined with an integrated volumetric navigator...
September 28, 2017: Radiology
https://www.readbyqxmd.com/read/28952907/loss-of-functional-connectivity-in-patients-with-parkinson-disease-and-visual-hallucinations
#12
Dagmar H Hepp, Elisabeth M J Foncke, Kim T E Olde Dubbelink, Wilma D J van de Berg, Henk W Berendse, Menno M Schoonheim
Purpose To gain more insight into the pathophysiological mechanisms of visual hallucinations (VHs) in patients with Parkinson disease (PD) by analyzing whole-brain resting-state functional connectivity in PD patients with VH (hereafter, referred to as PD + VH patients) and without VH (hereafter, referred to as PD - VH patients) and control participants. Materials and Methods For this retrospective study, 15 PD + VH patients, 40 PD - VH patients, and 15 control participants from a prospective cohort study were included, which was approved by the local ethics board and written informed consent was obtained from all participants...
September 27, 2017: Radiology
https://www.readbyqxmd.com/read/28956736/-18-f-16%C3%AE-17%C3%AE-fluoroestradiol-binding-specificity-in-estrogen-receptor-positive-breast-cancer
#13
Kelley Salem, Manoj Kumar, Ginny L Powers, Justin J Jeffery, Yongjun Yan, Aparna M Mahajan, Amy M Fowler
Purpose To determine the binding specificity of (18)F-16α-17β-fluoroestradiol (FES) in estrogen receptor (ER) α-positive breast cancer cells and tumor xenografts. Materials and Methods Protocols were approved by the office of biologic safety and institutional animal care and use committee. By using ER-negative MDA-MB-231 breast cancer cells, clonal lines were created that expressed either wild-type (WT; 231 WT ER) or G521R mutant ERα (231 G521R ER), which is defective in estradiol binding. ERα protein levels, subcellular localization, and transcriptional function were confirmed...
September 25, 2017: Radiology
https://www.readbyqxmd.com/read/28956735/imaging-the-infant-chest-without-sedation-feasibility-of-using-single-axial-rotation-with-16-cm-wide-detector-ct
#14
Yanan Zhu, Zhengjun Li, Jiankang Ma, Yucai Hong, Zhian Pi, Xianfeng Qu, Mingxing Xu, Jianying Li, Heping Zhou
Purpose To compare image quality, patient preparation time, and radiation dose using a single axial rotation with 16-cm wide-detector computed tomography (CT) in imaging the infant chest without sedation with those in infants examined by using a 64-row CT and sedation. Materials and Methods Thirty-two infants (group 1) were prospectively enrolled to undergo nonenhanced chest CT without sedation using a single axial rotation on a 16-cm wide-detector CT scanner. Patients were imaged with automatic tube current modulation and tube voltages of 80 kVp for patients weighing 5 kg or less and 100 kVp for patients weighing more than 5 kg...
September 25, 2017: Radiology
https://www.readbyqxmd.com/read/28956734/coronary-artery-disease-analysis-of-diagnostic-performance-of-ct-perfusion-and-mr-perfusion-imaging-in-comparison-with-quantitative-coronary-angiography-and-spect-multicenter-prospective-trial
#15
Matthias Rief, Marcus Y Chen, Andrea L Vavere, Benjamin Kendziora, Julie M Miller, W Patricia Bandettini, Christopher Cox, Richard T George, João Lima, Marcelo Di Carli, Michail Plotkin, Elke Zimmermann, Michael Laule, Peter Schlattmann, Andrew E Arai, Marc Dewey
Purpose To compare the diagnostic performance of stress myocardial computed tomography (CT) perfusion with that of stress myocardial magnetic resonance (MR) perfusion imaging in the detection of coronary artery disease (CAD). Materials and Methods All patients gave written informed consent prior to inclusion in this institutional review board-approved study. This two-center substudy of the prospective Combined Noninvasive Coronary Angiography and Myocardial Perfusion Imaging Using 320-Detector Row Computed Tomography (CORE320) multicenter trial included 92 patients (mean age, 63...
September 25, 2017: Radiology
https://www.readbyqxmd.com/read/28937853/assessment-of-microvascular-invasion-of-hepatocellular-carcinoma-with-diffusion-kurtosis-imaging
#16
Wen-Tao Wang, Li Yang, Zhao-Xia Yang, Xin-Xing Hu, Ying Ding, Xu Yan, Cai-Xia Fu, Robert Grimm, Meng-Su Zeng, Sheng-Xiang Rao
Purpose To evaluate the potential role of diffusion kurtosis imaging and conventional magnetic resonance (MR) imaging findings including standard monoexponential model of diffusion-weighted imaging and morphologic features for preoperative prediction of microvascular invasion (MVI) of hepatocellular carcinoma (HCC). Materials and Methods Institutional review board approval and written informed consent were obtained. Between September 2015 and November 2016, 84 patients (median age, 54 years; range, 29-79 years) with 92 histopathologically confirmed HCCs (40 MVI-positive lesions and 52 MVI-negative lesions) were analyzed...
September 22, 2017: Radiology
https://www.readbyqxmd.com/read/28934015/initial-clinical-experience-with-dual-agent-relaxation-contrast-for-isolated-lymphatic-channel-mapping
#17
Beth Ripley, Gregory J Wilson, Neeraj Lalwani, Noah Briller, Peter C Neligan, Jeffrey H Maki
Purpose To evaluate the clinical performance of dual-agent relaxation contrast (DARC) magnetic resonance (MR) lymphangiography compared with that of conventional MR lymphangiography in the creation of isolated lymphatic maps in patients with secondary lymphedema. Materials and Methods This retrospective study was approved by the institutional review board. The diagnostic quality of 42 DARC MR lymphangiographic studies was compared with that of 42 conventional MR lymphangiographic studies. Two independent readers rated venous contamination as absent, mild, or moderate to severe...
September 21, 2017: Radiology
https://www.readbyqxmd.com/read/28925823/deep-learning-mr-imaging-based-attenuation-correction-for-pet-mr-imaging
#18
Fang Liu, Hyungseok Jang, Richard Kijowski, Tyler Bradshaw, Alan B McMillan
Purpose To develop and evaluate the feasibility of deep learning approaches for magnetic resonance (MR) imaging-based attenuation correction (AC) (termed deep MRAC) in brain positron emission tomography (PET)/MR imaging. Materials and Methods A PET/MR imaging AC pipeline was built by using a deep learning approach to generate pseudo computed tomographic (CT) scans from MR images. A deep convolutional auto-encoder network was trained to identify air, bone, and soft tissue in volumetric head MR images coregistered to CT data for training...
September 19, 2017: Radiology
https://www.readbyqxmd.com/read/28915103/mr-spectroscopy-derived-proton-density-fat-fraction-is-superior-to-controlled-attenuation-parameter-for-detecting-and-grading-hepatic-steatosis
#19
Jurgen Henk Runge, Loek Pieter Smits, Joanne Verheij, Annekatrien Depla, Sjoerd Douwe Kuiken, Bert Cornelis Baak, Aart Johannes Nederveen, Ulrich Beuers, Jaap Stoker
Purpose To prospectively compare the diagnostic accuracy of controlled attenuation parameter (CAP) obtained with transient elastography and proton density fat fraction (PDFF) obtained with proton magnetic resonance (MR) spectroscopy with results of liver biopsy in a cohort of adult patients suspected of having nonalcoholic fatty liver disease (NAFLD). Materials and Methods The institutional review board approved this study. Informed consent was obtained from all patients. The authors evaluated 55 patients suspected of having NAFLD (40 men, 15 women)...
September 15, 2017: Radiology
https://www.readbyqxmd.com/read/28915102/acceleration-selective-arterial-spin-labeling-mr-angiography-used-to-visualize-distal-cerebral-arteries-and-collateral-vessels-in-moyamoya-disease
#20
Osamu Togao, Akio Hiwatashi, Makoto Obara, Koji Yamashita, Kazufumi Kikuchi, Ryotaro Kamei, Ataru Nishimura, Koichi Arimura, Koji Yoshimoto, Koji Iihara, Marc Van Cauteren, Hiroshi Honda
Purpose To evaluate and compare the performance of acceleration-selective arterial spin labeling (AccASL) magnetic resonance (MR) angiography in the visualization of cerebral arteries and collateral vessels in patients with Moyamoya disease with that of time-of-flight (TOF) MR angiography, with digital subtraction angiography (DSA) as the reference standard. Materials and Methods Thirty-six cerebral hemispheres from 22 patients with Moyamoya disease underwent TOF and AccASL MR angiography and DSA. Qualitative evaluations included imaging of the terminal internal carotid artery (ICA), distal middle cerebral arteries (MCAs), Moyamoya vessels, and leptomeningeal anastomosis (LMA) collaterals with reference to DSA...
September 15, 2017: Radiology
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