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Fat magnetic resonance imaging

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https://www.readbyqxmd.com/read/28925408/liver-volume-and-hepatic-adiposity-in-childhood-relations-to-body-growth-and-visceral-fat
#1
R Malpique, J Bassols, A López-Bermejo, M Diaz, F Villarroya, J Pavia, A Congo, F de Zegher, L Ibáñez
BACKGROUND AND OBJECTIVE: The sequence of prenatal growth restraint and postnatal catch-up growth may lead to hepato-visceral adiposity, insulin resistance and low-grade inflammation before the onset of puberty. In prepubertal children born appropriate for gestational age (AGA) or small for gestational age (SGA), we assessed potential relationships between the aforementioned sequence and liver volume. SUBJECTS/METHODS: The study population consisted of 86 children (41 AGA and 45 SGA with catch-up growth; age (mean±s...
August 14, 2017: International Journal of Obesity: Journal of the International Association for the Study of Obesity
https://www.readbyqxmd.com/read/28925406/abdominal-fat-deposits-determined-by-magnetic-resonance-imaging-in-relation-to-leptin-and-vaspin-levels-as-well-as-insulin-resistance-in-the-general-adult-population
#2
F Genske, J-P Kühn, M Pietzner, G Homuth, W Rathmann, H J Grabe, H Völzke, H Wallaschofski, N Friedrich
BACKGROUND: Various fat depots including visceral (VAT), subcutaneous adipose tissue (SAT) or liver fat content (LFC) were supposed to have different influences on various entities including adipokine levels as well as insulin resistance/sensitivity. Therefore, the aim of the study was to investigate the associations of SAT, VAT and LFC with the levels of leptin and vaspin as well as insulin resistance in a general non-diabetic population. METHODS: In total, 1825 participants of the Study of Health in Pomerania were characterized according to body fat compartments and LFC determined by magnetic resonance imaging...
August 14, 2017: International Journal of Obesity: Journal of the International Association for the Study of Obesity
https://www.readbyqxmd.com/read/28921580/integrating-prior-information-into-microwave-tomography-part-1-impact-of-detail-on-image-quality
#3
Douglas Kurrant, Anastasia Baran, Joe LoVetri, Elise Fear
PURPOSE: The authors investigate the impact that incremental increases in the level of detail of patient-specific prior information have on image quality and the convergence behavior of an inversion algorithm in the context of near-field microwave breast imaging. A methodology is presented that uses image quality measures to characterize the ability of the algorithm to reconstruct both internal structures and lesions embedded in fibroglandular tissue. The approach permits key aspects that impact the quality of reconstruction of these structures to be identified and quantified...
September 17, 2017: Medical Physics
https://www.readbyqxmd.com/read/28920539/the-effects-of-stabilization-splint-treatment-on-the-volume-of-masseter-muscle-in-sleep-bruxism-patients
#4
Suleyman Hakan Tuna, Osman Evren Celik, Onder Ozturk, Murat Golpinar, Aykut Aktas, Huseyin Avni Balcioglu, Filiz Keyf, Bunyamin Sahin
Objective The aim of this study was to evaluate, quantitatively, the volumetric effects of stabilization splint therapy on the masseter muscle of sleep bruxism (SB) patients. Methods The magnetic resonance (MR) images of 16 SB patients diagnosed by polysomnography (PSG) who used stabilization splints for four months were obtained before and after the therapy. The masseter muscle volume was calculated using Cavalieri's principle on the MR images. Results After the splint therapy, the mean volume of the masseter muscle did not reduce significantly...
September 18, 2017: Cranio: the Journal of Craniomandibular Practice
https://www.readbyqxmd.com/read/28913879/short-t2-imaging-using-a-3d-double-adiabatic-inversion-recovery-prepared-ultrashort-echo-time-cones-3d-dir-ute-cones-sequence
#5
Ya-Jun Ma, Yanchun Zhu, Xing Lu, Michael Carl, Eric Y Chang, Jiang Du
PURPOSE: To investigate high contrast imaging of short T2 tissues with a three-dimensional double adiabatic inversion recovery prepared ultrashort echo time Cones (3D DIR-UTE-Cones) sequence. METHODS: The sequence used two sequential adiabatic inversion pulses to suppress signals from long T2 tissues, followed by multispoke UTE acquisition to detect signals from short T2 tissues. The two adiabatic inversion pulses are identical with a center frequency located at the water peak, but the spectral width is broad enough to cover both water and fat frequencies...
September 14, 2017: Magnetic Resonance in Medicine: Official Journal of the Society of Magnetic Resonance in Medicine
https://www.readbyqxmd.com/read/28913287/cryptogenic-temporal-hollowing
#6
Ie Hyon Park, Heeyeon Kwon, Sang Wha Kim
Temporal hollowing is a common complication that occurs after coronal approach surgeries. However, temporal hollowing without previous nerve damage or trauma history is rare. Herein, we present a patient with cryptogenic temporal hollowing. A 22-year-old man without any history of craniofacial interventions or trauma presented with temporal hallowing. Magnetic resonance imaging revealed fatty degeneration of the left temporalis muscle. Electromyography and nerve conduction study showed no signs of neurologic abnormalities...
December 2016: Arch Craniofac Surg
https://www.readbyqxmd.com/read/28911619/characterization-of-yogurts-made-with-milk-solids-nonfat-by-rheological-behavior-and-nuclear-magnetic-resonance-spectroscopy
#7
Hai-Yan Yu, Li Wang, Kathryn L McCarthy
The effect of adding milk solids nonfat (MSNF) on the physical properties and microstructure of yogurts was investigated. The physical properties of fat free yogurt, fat free with MSNF yogurt, whole fat yogurt, and whole fat with MSNF yogurt were analyzed using shear viscosity, viscoelasticity, and texture analysis. The two yogurts with MSNF had higher consistency coefficient (K), storage modulus (G'), yield stress, and hardness. To gain insight into the multiphase system, nuclear magnetic resonance (NMR) and brightfield microscope images were acquired...
October 2016: Journal of Food and Drug Analysis
https://www.readbyqxmd.com/read/28906339/multiparametric-magnetic-resonance-imaging-of-prostate-cancer-bone-disease-correlation-with-bone-biopsy-histological-and-molecular-features
#8
Raquel Perez-Lopez, Daniel Nava Rodrigues, Ines Figueiredo, Joaquin Mateo, David J Collins, Dow-Mu Koh, Johann S de Bono, Nina Tunariu
OBJECTIVES: The aim of this study was to correlate magnetic resonance imaging (MRI) of castration-resistant prostate cancer (CRPC) bone metastases with histological and molecular features of bone metastases. MATERIALS AND METHODS: Forty-three bone marrow biopsies from 33 metastatic CRPC (mCRPC) patients with multiparametric MRI and documented bone metastases were evaluated. A second cohort included 10 CRPC patients with no bone metastases. Associations of apparent diffusion coefficient (ADC), normalized b900 diffusion-weighted imaging (nDWI) signal, and signal-weighted fat fraction (swFF) with bone marrow biopsy histological parameters were evaluated using Mann-Whitney U test and Spearman correlations...
September 12, 2017: Investigative Radiology
https://www.readbyqxmd.com/read/28905416/sar-and-scan-time-optimized-3d-whole-brain-double-inversion-recovery-imaging-at-7t
#9
Eberhard D Pracht, Thorsten Feiweier, Philipp Ehses, Daniel Brenner, Alard Roebroeck, Bernd Weber, Tony Stöcker
PURPOSE: The aim of this project was to implement an ultra-high field (UHF) optimized double inversion recovery (DIR) sequence for gray matter (GM) imaging, enabling whole brain coverage in short acquisition times ( ≈5 min, image resolution 1 mm(3) ). METHODS: A 3D variable flip angle DIR turbo spin echo (TSE) sequence was optimized for UHF application. We implemented an improved, fast, and specific absorption rate (SAR) efficient TSE imaging module, utilizing improved reordering...
September 14, 2017: Magnetic Resonance in Medicine: Official Journal of the Society of Magnetic Resonance in Medicine
https://www.readbyqxmd.com/read/28901051/noninvasive-submental-fat-reduction-using-colder-cryolipolysis
#10
Hector Leal Silva, Esther Carmona Hernandez, Mariana Grijalva Vazquez, Sebastian Leal Delgado, Angel Perez Blanco
BACKGROUND: Cryolipolysis has shown to significantly reduce localized subcutaneous fat, including submental fat. Temperatures below -11°C have not been used to treat the submental region. OBJECTIVE: The purpose of this study was to evaluate safety and efficacy of Cryolipolysis for noninvasive reduction of submental fat using lower temperatures and reduced treatment time. METHODS: A small volume applicator was used to treat 15 subjects, using a noninvasive tissue cooling device (CoolSculpting System, ZELTIQ Aesthetics, Pleasanton, CA, USA) during 45 and 30 minutes at -12 and -15°C, respectively, to induce reduction of submental fat...
September 12, 2017: Journal of Cosmetic Dermatology
https://www.readbyqxmd.com/read/28895045/influence-of-gd-eob-dtpa-on-proton-density-fat-fraction-using-the-six-echo-dixon-method-in-3-tesla-magnetic-resonance-imaging
#11
Tatsuya Hayashi, Kei Fukuzawa, Hiroshi Kondo, Hiroshi Onodera, Shuji Toyotaka, Rie Tojo, Shimpei Yano, Masakatsu Tano, Tosiaki Miyati, Jun'ichi Kotoku, Takahide Okamoto, Keiko Toyoda, Hiroshi Oba
The purpose of this study was to evaluate whether disodium gadoxetate (Gd-EOB-DTPA) affects proton density fat fractions (PDFFs) during use of the multiecho Dixon (meDixon) method in phantom and simulation magnetic resonance imaging (MRI) studies at 3 T. Fat-water phantoms comprising vegetable fat-water emulsions with varying fat volume percentages (0, 5, 10, 15, 20, 30, 40, and 50) and Gd-EOB-DTPA concentrations (0 and 0.4 mM) were prepared. Phantoms without Gd-EOB-DTPA were defined as precontrast, and those with Gd-EOB-DTPA were defined as postcontrast...
September 11, 2017: Radiological Physics and Technology
https://www.readbyqxmd.com/read/28894334/spondyloarthropathy-diagnostic-imaging-criteria-for-the-detection-of-sacroiliitis
#12
Moacir Ribeiro de Castro, Sonia de Aguiar Vilela Mitraud, Marina Celli Francisco, Artur da Rocha Corrêa Fernandes, Eloy de Ávila Fernandes
Diagnostic imaging is crucial to the diagnosis and monitoring of spondyloarthropathies. Magnetic resonance imaging is the most relevant tool for the early detection of sacroiliitis, allowing the institution of therapeutic strategies to impede the progression of the disease. This study illustrates the major criteria for a magnetic resonance imaging-based diagnosis of spondyloarthropathy. The cases selected here present images obtained from the medical records of patients diagnosed with sacroiliitis over a two-year period at our facility, depicting the active and chronic, irreversible forms of the disease...
July 2017: Radiologia Brasileira
https://www.readbyqxmd.com/read/28894328/comparison-of-cartesian-and-radial-acquisition-on-short-tau-inversion-recovery-stir-sequences-in-breast-mri
#13
Domiziana Santucci, Sheila S Lee, Heidi Hartman, Shyama Walgampaya, Mamdoh AlObaidy, Miguel Ramalho, Brian M Dale, Richard C Semelka
OBJECTIVE: The purpose of this study was to compare two short-tau inversion recovery (STIR) sequences, Cartesian and radial (BLADE) acquisitions, for breast magnetic resonance imaging (MRI) examinations. MATERIALS AND METHODS: Ninety-six women underwent 1.5 T breast MRI exam (48 Cartesian and 48 BLADE). Qualitative analysis including image artifacts, image quality, fat-suppression, chest-wall depiction, lesion detection, lymph node depiction and overall impression were evaluated by three blinded readers...
July 2017: Radiologia Brasileira
https://www.readbyqxmd.com/read/28894290/association-of-proton-density-fat-fraction-in-adipose-tissue-with-imaging-based-and-anthropometric-obesity-markers-in-adults
#14
D Franz, D Weidlich, F Freitag, C Holzapfel, T Drabsch, T Baum, H Eggers, A Witte, E J Rummeny, H Hauner, D C Karampinos
BACKGROUND/OBJECTIVES: The purpose of this study was to examine the relationship of the proton density fat fraction (PDFF), measured by magnetic resonance imaging (MRI), of supraclavicular and gluteal adipose tissue with subcutaneous and visceral adipose tissue (SAT and VAT) volumes, liver fat fraction and anthropometric obesity markers. The supraclavicular fossa was selected as a typical location where brown adipocytes may be present in humans and the gluteal region was selected as a typical location enclosing primarily white adipocytes...
August 14, 2017: International Journal of Obesity: Journal of the International Association for the Study of Obesity
https://www.readbyqxmd.com/read/28893004/subconjunctival-fat-prolapse-what-radiologists-need-to-know
#15
Gorky Medhi, Barun Kumar Sharma, Eezzat Khalda
Subconjunctival fat prolapse is a rare benign entity or disease presenting as fat containing epibulbar mass in lateral canthus region. Weakness of Tenon's capsule secondary to age, trauma or any surgery leads to herniation of intraconal fat. Radiologists should be aware of the condition and its imaging features. We report a case of 70-year-old obese man presenting with bilateral soft yellowish lateral canthal mass. Computed Tomography (CT) and Magnetic Resonance Imaging (MRI) showed typical imaging features of epibulbar fatty lesion in continuation with the intraconal fat...
July 2017: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28892997/quantification-of-liver-fat-with-mdixon-magnetic-resonance-imaging-comparison-with-the-computed-tomography-and-the-biopsy
#16
Venkatraman Bhat, Sundararaman Velandai, Vikram Belliappa, Jeyeram Illayraja, Karthik Gadabana Halli, Gayathri Gopalakrishnan
INTRODUCTION: Accurate, non-invasive method of fat estimation is a valuable test for evaluation of diseases with abnormal hepatic fat. AIM: To determine the accuracy of mDixon MR technique in assessment of liver fat over CT and to correlate the CT and MRI findings with biopsy. MATERIALS AND METHODS: A prospective observational study was conducted at Imaging Services of Narayana Multispeciality Hospital between March 2011- December 2012. Thirty patients who attended the clinic for non-hepatic complaints were included in the study...
July 2017: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28892558/the-ask1-inhibitor-selonsertib-in-patients-with-nonalcoholic-steatohepatitis-a-randomized-phase-2-trial
#17
Rohit Loomba, Eric Lawitz, Parvez S Mantry, Saumya Jayakumar, Stephen H Caldwell, Hays Arnold, Anna Mae Diehl, C Stephen Djedjos, Ling Han, Robert P Myers, G Mani Subramanian, John G McHutchison, Zachary D Goodman, Nezam H Afdhal, Michael R Charlton
Inhibition of apoptosis signal-regulating kinase 1 (ASK1), a serine/threonine kinase, leads to improvement in inflammation and fibrosis in animal models of nonalcoholic steatohepatitis (NASH). We evaluated the safety and efficacy of selonsertib, a selective inhibitor of ASK1, alone or in combination with simtuzumab, in patients with NASH and stage 2 or 3 liver fibrosis. In this multicenter phase 2 trial, 72 patients were randomized to receive 24 weeks of open-label treatment with either 6 or 18 mg of selonsertib orally once daily with or without once-weekly injections of 125 mg of simtuzumab, or simtuzumab alone...
September 11, 2017: Hepatology: Official Journal of the American Association for the Study of Liver Diseases
https://www.readbyqxmd.com/read/28892458/linearity-bias-and-precision-of-hepatic-proton-density-fat-fraction-measurements-by-using-mr-imaging-a-meta-analysis
#18
Takeshi Yokoo, Suraj D Serai, Ali Pirasteh, Mustafa R Bashir, Gavin Hamilton, Diego Hernando, Houchun H Hu, Holger Hetterich, Jens-Peter Kühn, Guido M Kukuk, Rohit Loomba, Michael S Middleton, Nancy A Obuchowski, Ji Soo Song, An Tang, Xinhuai Wu, Scott B Reeder, Claude B Sirlin
Purpose To determine the linearity, bias, and precision of hepatic proton density fat fraction (PDFF) measurements by using magnetic resonance (MR) imaging across different field strengths, imager manufacturers, and reconstruction methods. Materials and Methods This meta-analysis was performed in accordance with Preferred Reporting Items for Systematic Reviews and Meta-Analyses guidelines. A systematic literature search identified studies that evaluated the linearity and/or bias of hepatic PDFF measurements by using MR imaging (hereafter, MR imaging-PDFF) against PDFF measurements by using colocalized MR spectroscopy (hereafter, MR spectroscopy-PDFF) or the precision of MR imaging-PDFF...
September 11, 2017: Radiology
https://www.readbyqxmd.com/read/28889331/magnetic-resonance-imaging-based-evaluation-of-ossification-of-the-medial-clavicular-epiphysis-in-forensic-age-assessment
#19
S Schmidt, C Ottow, H Pfeiffer, W Heindel, V Vieth, A Schmeling, R Schulz
Evaluation of the degree of ossification of the medial clavicular epiphysis plays a crucial role in determining with an adequate degree of probability whether legally relevant age boundaries after the age of 17 have been crossed. In view of the need to avoid unnecessary radiation exposure, establishing non-X-ray methods for investigating the clavicle has long been a key objective in forensic age assessment research. Based on magnetic resonance imaging examinations in a large sample of healthy subjects, the current study for the first time presents statistical measures which allow inferences to be drawn for forensic age assessment in both sexes...
September 9, 2017: International Journal of Legal Medicine
https://www.readbyqxmd.com/read/28888741/magnetic-resonance-signal-abnormalities-within-the-pericruciate-fat-pad-a-possible-secondary-sign-for-acute-anterior-cruciate-ligament-tears
#20
Ferdinando Draghi, Mario Torresi, Luigi Urciuoli, Salvatore Gitto
PURPOSE: The study sought to investigate the presence of magnetic resonance (MR) signal alterations within the pericruciate fat pad in patients with an acute anterior cruciate ligament (ACL) tear as well as evaluate its diagnostic value in comparison with the main secondary signs of ACL tears. METHODS: Two musculoskeletal radiologists retrospectively reviewed knee MR examinations performed from May to October 2015. The ACL was considered as torn or intact based on either previous arthroscopic findings or unequivocal MR imaging interpretation if arthroscopic correlation was unavailable...
September 6, 2017: Canadian Association of Radiologists Journal, Journal L'Association Canadienne des Radiologistes
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