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Radiology

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https://www.readbyqxmd.com/read/28813235/temporary-hearing-threshold-shift-in-healthy-volunteers-with-hearing-protection-caused-by-acoustic-noise-exposure-during-3-t-multisequence-mr-neuroimaging
#1
Chao Jin, Huan Li, Xianjun Li, Miaomiao Wang, Congcong Liu, Jianxin Guo, Jian Yang
Purpose To determine whether a single 51-minute exposure to acoustic noise during 3-T multisequence magnetic resonance (MR) neuroimaging could affect the hearing threshold of healthy adults with earplugs and sponge mats as hearing protection. Materials and Methods With earplugs and motion-refraining sponge mats as hearing protection, 26 healthy young adults underwent 3-T MR neuroimaging imaging that included T1-weighted three-dimensional gradient-echo sequence, T2-weighted fast spin-echo sequence, diffusion-tensor imaging, diffusion-kurtosis imaging, T2*-weighted three-dimensional multiecho gradient-echo sequence, and blood oxygen level-dependent imaging...
August 16, 2017: Radiology
https://www.readbyqxmd.com/read/28813234/cardiac-mr-strain-a-noninvasive-biomarker-of-fibrofatty-remodeling-of-the-left-atrial-myocardium
#2
Adrian T Huber, Jérôme Lamy, Amer Rahhal, Morgane Evin, Fabrice Atassi, Carine Defrance, Guillaume Lebreton, Karine Clément, Myriam Berthet, Richard Isnard, Pascal Leprince, Philippe Cluzel, Stéphane N Hatem, Nadjia Kachenoura, Alban Redheuil
Purpose To determine whether left atrial (LA) strain quantification with cardiac magnetic resonance (MR) imaging feature tracking is associated with the severity of LA fibrofatty myocardial remodeling at histologic analysis. Materials and Methods This prospective case-control study was approved by the institutional review board. LA strain was evaluated with cardiac MR feature tracking between January 2014 and March 2015 in 13 consecutive patients (mean age, 61 years ± 19; nine male) with mitral regurgitation in the 24 hours before mitral valve surgery and 13 age- and sex-matched healthy control subjects...
August 16, 2017: Radiology
https://www.readbyqxmd.com/read/28809582/iodixanol-versus-iopromide-at-coronary-ct-angiography-lumen-opacification-and-effect-on-heart-rhythm-the-randomized-isocor-trial
#3
Marisa M Lubbers, Marc Kock, André Niezen, Tjebbe Galema, Marcel Kofflard, Tobias Bruning, Henriette S Kooij, Hanneke van Valen, Marcel Dijkshoorn, Ronald Booij, Anthony Padmos, Alain Vogels, Ricardo P J Budde, Koen Nieman
Purpose To show that equal coronary lumen opacification can be achieved with iso- and low-osmolar contrast media when it is injected at the same iodine delivery rate with contemporary cardiac computed tomographic (CT) protocols and to investigate the cardiovascular effect of iso-osmolar contrast media and the image quality achieved. Materials and Methods Institutional review board approval and written informed consent were obtained for the Effect of Iso-osmolar Contrast Medium on Coronary Opacification and Heart Rhythm in Coronary CT Angiography, or IsoCOR, trial...
August 15, 2017: Radiology
https://www.readbyqxmd.com/read/28809584/risk-of-meningioma-after-ct-of-the-head
#4
Arvid C Nordenskjöld, Robert Bujila, Peter Aspelin, Olof Flodmark, Magnus Kaijser
Purpose To investigate the association between exposure to head computed tomography (CT) and subsequent risk of meningioma. Materials and Methods The study was approved by the local ethics committee. A cohort of 26 370 subjects was retrospectively collected from a radiology archive of CT examinations of the head performed from 1973 through 1992. For comparison, an age- and sex-matched cohort of 96 940 subjects who were not exposed to CT (unexposed cohort) was gathered. The risk of meningioma was assessed by using data from the Swedish Cancer Registry; however, one-third of patients with meningioma had to be excluded because they either had a prevalent meningioma or other brain tumor at the first CT examination or had undergone radiation treatment to the head...
August 14, 2017: Radiology
https://www.readbyqxmd.com/read/28799862/disrupted-topologic-efficiency-of-white-matter-structural-connectome-in-individuals-with-subjective-cognitive-decline
#5
Ni Shu, Xiaoni Wang, Qiuhui Bi, Tengda Zhao, Ying Han
Purpose To determine whether individuals with subjective cognitive decline (SCD), which is defined by memory complaints with normal performance at objective neuropsychologic examinations, exhibit disruptions of white matter (WM) connectivity and topologic alterations of the brain structural connectome. Materials and Methods Diffusion-tensor magnetic resonance imaging and graph theory approaches were used to investigate the topologic organization of the brain structural connectome in 36 participants with SCD (21 women: mean age, 62...
August 11, 2017: Radiology
https://www.readbyqxmd.com/read/28799861/absence-of-cortical-vein-opacification-is-associated-with-lack-of-intra-arterial-therapy-benefit-in-stroke
#6
Ivo G H Jansen, Annemieke B van Vuuren, Wim H van Zwam, Ido R van den Wijngaard, Olvert A Berkhemer, Hester F Lingsma, Cornelis H Slump, Robert J van Oostenbrugge, Kilian M Treurniet, Diederik W J Dippel, Marianne A A van Walderveen, Aad van der Lugt, Yvo B W E M Roos, Henk A Marquering, Charles B L M Majoie, René van den Berg
Purpose To assess the degree of cortical vein opacification in patients with internal carotid artery or middle cerebral artery (MCA) stroke and to evaluate the relationship with treatment benefit from intra-arterial therapy (IAT). Materials and Methods Written informed consent was obtained from all patients in the Multicenter Randomized Clinical Trial of Endovascular Treatment for Acute Ischemic Stroke in the Netherlands. From the trial's database, all patients (recruited from December 2010 until March 2014) with baseline computed tomographic (CT) angiograms were retrospectively included...
August 11, 2017: Radiology
https://www.readbyqxmd.com/read/28799843/multiple-myeloma-and-dual-energy-ct-diagnostic-accuracy-of-virtual-noncalcium-technique-for-detection-of-bone-marrow-infiltration-of-the-spine-and-pelvis
#7
Aleksander Kosmala, Andreas Max Weng, Anke Heidemeier, Bernhard Krauss, Stefan Knop, Thorsten Alexander Bley, Bernhard Petritsch
Purpose To determine the diagnostic performance of dual-energy computed tomography (CT) for detection of bone marrow (BM) infiltration in patients with multiple myeloma by using a virtual noncalcium (VNCa) technique. Materials and Methods In this prospective study, 34 consecutive patients with multiple myeloma or monoclonal gammopathy of unknown significance sequentially underwent dual-energy CT and magnetic resonance (MR) imaging of the axial skeleton. Two independent readers visually evaluated standard CT and color-coded VNCa images for the presence of BM involvement...
August 11, 2017: Radiology
https://www.readbyqxmd.com/read/28799842/midterm-safety-and-efficacy-of-irreversible-electroporation-of-malignant-liver-tumors-located-close-to-major-portal-or-hepatic-veins
#8
Martina Distelmaier, Alexandra Barabasch, Philipp Heil, Nils A Kraemer, Peter Isfort, Sebastian Keil, Christiane K Kuhl, Philipp Bruners
Purpose To investigate the efficacy and safety of irreversible electroporation (IRE) in the treatment of hepatic tumors not suitable for thermal ablation (radiofrequency ablation [RFA] or microwave ablation). Materials and Methods This was an institutional review board-approved prospective study in 29 patients (15 men, 14 women; mean age, 63 years ± 12 [standard deviation]) with 43 primary (n = 8) or secondary (n = 35) malignant liver tumors who underwent computed tomography (CT)-guided IRE. All target tumors were located immediately adjacent to major hepatic veins, portal veins, or both; thus, they were not considered suitable for RFA or microwave ablation...
August 11, 2017: Radiology
https://www.readbyqxmd.com/read/28796590/subsolid-lung-nodule-classification-a-ct-criterion-for-improving-interobserver-agreement
#9
Marie-Pierre Revel, Inès Mannes, Joseph Benzakoun, Claude Guinet, Thomas Léger, Philippe Grenier, Audrey Lupo, Ludovic Fournel, Guillaume Chassagnon, Sébastien Bommart
Purpose To evaluate an objective computed tomographic (CT) criterion for distinguishing between part-solid (PS) and nonsolid (NS) lung nodules. Materials and Methods This study received institutional review board approval, and patients gave informed consent. Preoperative CT studies in all patients who underwent surgery for subsolid nodules between 2008 and 2015 were first reviewed by two senior radiologists, who subjectively classified the nodules as PS or NS. A second reading performed 1 month later used predefined classification criteria and involved a third senior radiologist as well as three junior radiologists...
August 8, 2017: Radiology
https://www.readbyqxmd.com/read/28787263/sirolimus-eluting-biodegradable-poly-l-lactic-acid-stent-to-suppress-granulation-tissue-formation-in-the-rat-urethra
#10
Kun Yung Kim, Jung-Hoon Park, Do Hoon Kim, Jiaywei Tsauo, Min Tae Kim, Woo-Chan Son, Sung-Gwon Kang, Dong-Hyun Kim, Ho-Young Song
Purpose To investigate the use of sirolimus-eluting biodegradable stents (SEBSs) to suppress granulation tissue formation after stent placement in a rat urethral model. Materials and Methods All experiments were approved by the animal research committee. A total of 36 male Sprague-Dawley rats were randomized into three equal groups after biodegradable stent placement. Group A received control biodegradable stents. Groups B and C received stents coated with 90 µg/cm(2) and 450 µg/cm(2) sirolimus, respectively...
August 8, 2017: Radiology
https://www.readbyqxmd.com/read/28787262/what-is-the-optimal-abdominal-aortic-aneurysm-sac-measurement-on-ct-images-during-follow-up-after-endovascular-repair
#11
Johannes Boos, Olga R Brook, Jieming Fang, Nathaniel Temin, Alexander Brook, Vasillios Raptopoulos
Purpose To develop a computed tomographic (CT) angiographic postprocessing protocol with two- and three-dimensional measurements for follow-up of patients who underwent endovascular aortic repair. Materials and Methods This HIPAA-compliant institutional review board-approved retrospective study included 159 patients (129 men, 30 women; mean age ± standard deviation, 74.9 years ± 8.2) who underwent 824 CT examinations (median of five examinations per patient; range, two to 14) with unenhanced and arterial -phase imaging performed between September 2004 and March 2015...
August 8, 2017: Radiology
https://www.readbyqxmd.com/read/28787261/pilot-evaluation-of-angiogenesis-signaling-factor-response-after-transcatheter-arterial-embolization-for-hepatocellular-carcinoma
#12
James Ronald, Andrew B Nixon, Daniele Marin, Rajan T Gupta, Gemini Janas, Willa Chen, Paul V Suhocki, Waleska Pabon-Ramos, David R Sopko, Mark D Starr, John C Brady, Herbert I Hurwitz, Charles Y Kim
Purpose To identify changes in a broad panel of circulating angiogenesis factors after bland transcatheter arterial embolization (TAE), a purely ischemic treatment for hepatocellular carcinoma (HCC). Materials and Methods This prospective HIPAA-compliant study was approved by the institutional review board. Informed written consent was obtained from all participants prior to entry into the study. Twenty-five patients (21 men; mean age, 61 years; range, 30-81 years) with Liver Imaging Reporting and Data System category 5 or biopsy-proven HCC and who were undergoing TAE were enrolled from October 15, 2014, through December 2, 2015...
August 8, 2017: Radiology
https://www.readbyqxmd.com/read/28786752/brain-mr-imaging-findings-and-associated-outcomes-in-carriers-of-the-reciprocal-copy-number-variation-at-16p11-2
#13
Julia P Owen, Polina Bukshpun, Nicholas Pojman, Tony Thieu, Qixuan Chen, Jihui Lee, Debra D'Angelo, Orit A Glenn, Jill V Hunter, Jeffrey I Berman, Timothy P Roberts, Randy Buckner, Srikantan S Nagarajan, Pratik Mukherjee, Elliott H Sherr
Purpose To identify developmental neuroradiologic findings in a large cohort of carriers who have deletion and duplication at 16p11.2 (one of the most common genetic causes of autism spectrum disorder [ASD]) and assess how these features are associated with behavioral and cognitive outcomes. Materials and Methods Seventy-nine carriers of a deletion at 16p11.2 (referred to as deletion carriers; age range, 1-48 years; mean age, 12.3 years; 42 male patients), 79 carriers of a duplication at 16p11.2 (referred to as duplication carriers; age range, 1-63 years; mean age, 24...
August 8, 2017: Radiology
https://www.readbyqxmd.com/read/28777704/noninvasive-identification-of-renal-hypoxia-in-experimental-myocardial-infarctions-of-different-sizes-by-using-bold-mr-imaging-in-a-mouse-model
#14
Di Chang, Yuan-Cheng Wang, Ting-Ting Xu, Xin-Gui Peng, Yu Cai, Lin Wang, Ying-Ying Bai, Shenghong Ju
Purpose To test the feasibility of using blood oxygen level-dependent (BOLD) magnetic resonance (MR) imaging to measure alterations in renal oxygenation in a mouse model with experimental myocardial infarctions (MIs) of different sizes. Materials and Methods The study was approved by the local animal ethics committee. One hundred eighty-nine male C57BL/6 J mice were randomly subjected to MI surgery (with different locations of left anterior descending coronary artery occlusion) or sham surgery, defined as the exposure of the heart but no ligation...
August 4, 2017: Radiology
https://www.readbyqxmd.com/read/28777703/structural-alterations-in-chronic-capsular-versus-pontine-stroke
#15
Lin Jiang, Jingchun Liu, Caihong Wang, Jun Guo, Jingliang Cheng, Tong Han, Peifang Miao, Chen Cao, Chunshui Yu
Purpose To investigate whether patients with capsular stroke (CS) and patients with pontine stroke (PS) involving the motor pathway have different types of structural damage and reorganization. Materials and Methods With institutional review board approval and after obtaining written informed consent, structural magnetic resonance imaging data were prospectively acquired in 115 patients with CS, 47 patients with PS, and 116 control subjects by using four imagers from three hospitals. Patients with stroke lesions in the left and right hemispheres were analyzed (timing of follow-up imaging: mean, 597 days; range, 180-2070 days)...
August 4, 2017: Radiology
https://www.readbyqxmd.com/read/28777701/a-pet-mr-imaging-approach-for-the-integrated-assessment-of-chemotherapy-induced-brain-heart-and-bone-injuries-in-pediatric-cancer-survivors-a-pilot-study
#16
Ashok J Theruvath, Anat Ilivitzki, Anne Muehe, Johanna Theruvath, Praveen Gulaka, Christine Kim, Sandra Luna-Fineman, Kathleen M Sakamoto, Kristen W Yeom, Phillip Yang, Michael Moseley, Frandics Chan, Heike E Daldrup-Link
Purpose To develop a positron emission tomography (PET)/magnetic resonance (MR) imaging protocol for evaluation of the brain, heart, and joints of pediatric cancer survivors for chemotherapy-induced injuries in one session. Materials and Methods Three teams of experts in neuroimaging, cardiac imaging, and bone imaging were tasked to develop a 20-30-minute PET/MR imaging protocol for detection of chemotherapy-induced tissue injuries of the brain, heart, and bone. In an institutional review board-approved, HIPAA-compliant, prospective study from April to July 2016, 10 pediatric cancer survivors who completed chemotherapy underwent imaging of the brain, heart, and bone with a 3-T PET/MR imager...
August 4, 2017: Radiology
https://www.readbyqxmd.com/read/28759326/assessment-of-strangulation-in-adhesive-small-bowel-obstruction-on-the-basis-of-combined-ct-findings-implications-for-clinical-care
#17
Ingrid Millet, Delphine Boutot, Claire Faget, Emmanuelle Pages-Bouic, Nicolas Molinari, Marc Zins, Patrice Taourel
Purpose To determine which computed tomography (CT) findings or combinations of findings can help to accurately identify strangulation in adhesive small bowel obstruction (SBO). Materials and Methods Contrast agent-enhanced CT findings in a cohort of 256 patients consecutively admitted for adhesive SBO, with a delay of less than 24 hours between CT and surgery for the operated patients, were reviewed independently by two radiologists, with consensus by a third, to assess CT findings commonly associated with strangulation...
July 31, 2017: Radiology
https://www.readbyqxmd.com/read/28753389/feasibility-of-dose-reduced-chest-ct-with-photon-counting-detectors-initial-results-in-humans
#18
Rolf Symons, Amir Pourmorteza, Veit Sandfort, Mark A Ahlman, Tracy Cropper, Marissa Mallek, Steffen Kappler, Stefan Ulzheimer, Mahadevappa Mahesh, Elizabeth C Jones, Ashkan A Malayeri, Les R Folio, David A Bluemke
Purpose To investigate whether photon-counting detector (PCD) technology can improve dose-reduced chest computed tomography (CT) image quality compared with that attained with conventional energy-integrating detector (EID) technology in vivo. Materials and Methods This was a HIPAA-compliant institutional review board-approved study, with informed consent from patients. Dose-reduced spiral unenhanced lung EID and PCD CT examinations were performed in 30 asymptomatic volunteers in accordance with manufacturer-recommended guidelines for CT lung cancer screening (120-kVp tube voltage, 20-mAs reference tube current-time product for both detectors)...
July 28, 2017: Radiology
https://www.readbyqxmd.com/read/28745940/intravenous-corticosteroid-premedication-administered-5-hours-before-ct-compared-with-a-traditional-13-hour-oral-regimen
#19
Benjamin M Mervak, Richard H Cohan, James H Ellis, Shokoufeh Khalatbari, Matthew S Davenport
Purpose To determine if the allergic-like breakthrough reaction rate of intravenous corticosteroid prophylaxis administered 5 hours before contrast material-enhanced computed tomography (CT) is noninferior to that of a traditional 13-hour oral regimen. Materials and Methods Institutional review board approval was obtained and informed consent waived for this retrospective noninferiority cohort study. Subjects (n = 202) who completed an accelerated 5-hour intravenous corticosteroid premedication regimen before low-osmolality contrast-enhanced CT for a prior allergic-like or unknown-type reaction to iodine-based contrast material from June 1, 2008, to June 30, 2016, were identified...
July 26, 2017: Radiology
https://www.readbyqxmd.com/read/28745939/reduced-pineal-volume-in-alzheimer-disease-a-retrospective-cross-sectional-mr-imaging-study
#20
Teruyuki Matsuoka, Ayu Imai, Hiroshi Fujimoto, Yuka Kato, Keisuke Shibata, Kaeko Nakamura, Hajime Yokota, Kei Yamada, Jin Narumoto
Purpose To evaluate pineal volume in patients with Alzheimer disease (AD), patients with mild cognitive impairment (MCI), and healthy control subjects and to correlate the findings with results of cognitive testing and brain parenchymal volumes. Materials and Methods The ethics committee approved this retrospective study. The participants included 63 patients with AD, 33 patients with MCI, and 24 healthy control subjects. There were 36 men and 84 women, with a mean age (±standard deviation) of 76.7 years ± 7...
July 26, 2017: Radiology
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