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Fat fraction mri

Naoki Ohno, Tosiaki Miyati, Shuto Suzuki, Hirohito Kan, Toshitaka Aoki, Yoshitaka Nakamura, Yuki Hiramatsu, Satoshi Kobayashi, Toshifumi Gabata
PURPOSE: To suppress olefinic signals and enable simultaneous and quantitative estimation of multiple functional parameters associated with water and lipid, we investigated a modified method using chemical shift displacement and recovery-based separation of lipid tissue (SPLIT) involving acquisitions with different inversion times (TIs), echo times (TEs), and b-values. MATERIALS AND METHODS: Single-shot diffusion echo-planar imaging (SSD-EPI) with multiple b-values (0-3000 s/mm2 ) was performed without fat suppression to separate water and lipid images using the chemical shift displacement of lipid signals in the phase-encoding direction...
March 12, 2018: Magnetic Resonance Imaging
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
A diameter of glass bottles in phantoms in the above article (2 cm) was incorrect. The correct diameter is 4.5 cm.
March 14, 2018: Radiological Physics and Technology
Maggie A Stanislawski, Catherine A Lozupone, Brandie D Wagner, Merete Eggesbø, Marci K Sontag, Nichole Nusbacher, Mercedes Martinez, Dana Dabelea
BACKGROUND: Recent evidence supports that the gut microbiota may be involved in the pathophysiology of non-alcoholic fatty liver disease (NAFLD), and may also offer avenues for treatment or prevention. METHODS: We investigated the associations among gut microbiota, diet and hepatic fat fraction (HFF) in 107 adolescents. Magnetic Resonance Imaging (MRI) was used to assess HFF, and 16S rRNA gene sequencing was performed on collected fecal samples. Dietary intake was assessed using Food Frequency Questionnaires...
March 14, 2018: Pediatric Research
Stephen A Harrison, Mary E Rinella, Manal F Abdelmalek, James F Trotter, Angelo H Paredes, Hays L Arnold, Marcelo Kugelmas, Mustafa R Bashir, Mark J Jaros, Lei Ling, Stephen J Rossi, Alex M DePaoli, Rohit Loomba
BACKGROUND: Non-alcoholic steatohepatitis is a chronic liver disease characterised by the presence of hepatic steatosis, inflammation, and hepatocellular injury, for which no Food and Drug Administration (FDA)-approved treatment exists. FGF19 is a hormone that regulates bile acid synthesis and glucose homoeostasis. We aimed to assess the safety and efficacy of NGM282, an engineered FGF19 analogue, for the treatment of non-alcoholic steatohepatitis. METHODS: In this randomised, double-blind, placebo-controlled, phase 2 study, we recruited patients aged 18-75 years with biopsy-confirmed non-alcoholic steatohepatitis as defined by the non-alcoholic steatohepatitis clinical research network histological scoring system, from hospitals and gastroenterology and liver clinics in Australia and the USA...
March 5, 2018: Lancet
Corinna Storz, Susanne Rospleszcz, Roberto Lorbeer, Holger Hetterich, Sigrid D Auweter, Wieland Sommer, Jürgen Machann, Sergios Gatidis, Wolfgang Rathmann, Margit Heier, Birgit Linkohr, Christa Meisinger, Maximilian Reiser, Udo Hoffmann, Annette Peters, Christopher L Schlett, Fabian Bamberg
INTRODUCTION: Detailed mechanisms in the pathophysiology of diabetes disease are poorly understood, but structural alterations in various organ systems incur an elevated risk for cardiovascular events and adverse outcome. The aim of this study was to compare multiorgan subclinical disease phenotypes by magnetic resonance (MR) imaging to study differences between subjects with prediabetes, diabetes, and normal controls. MATERIALS AND METHODS: Subjects without prior cardiovascular disease were enrolled in a prospective case-control study and underwent multiorgan MR for the assessment of metabolic and arteriosclerotic alterations, including age-related white matter changes, hepatic proton density fat fraction, visceral adipose tissue volume, left ventricular remodeling index, carotid plaque, and late gadolinium enhancement...
February 28, 2018: Investigative Radiology
Francesca Del Chicca, Andrea Schwarz, Dieter Meier, Paula Grest, Annette Liesegang, Patrick Robert Kircher
Objective of the present study is to describe two non-invasive methods of fat quantification in the normal canine liver using magnetic resonance imaging and spectroscopy. Eleven adult beagle dogs were anesthetized and underwent magnetic resonance examination of the cranial abdomen including morphologic imaging, a modified Dixon (mDixon) dual gradient echo sequence and proton magnetic resonance spectroscopy (1 H MRS). In addition, ultrasonographic examination of the liver, fine needle aspirates and liver biopsies were performed, and hepatic triglyceride content was assayed...
February 27, 2018: Journal of Veterinary Science
Daiki Tamada, Tetsuya Wakayama, Hiroshi Onishi, Utaroh Motosugi
PURPOSE: To develop multiparameter mapping including T1 , R2*, and proton density fat fraction with a single breath-hold to evaluate liver disease and liver function. METHODS: A 6-echo spoiled gradient-echo sequence with dual flip angles was used to acquire a 12-set MRI volume data set. To shorten the scan time, undersampling and multicontrast compressed-sensing reconstruction were used. The scan time was 18 seconds. R2* and proton density fat fraction mapping were achieved by using the iterative least-squares method...
February 24, 2018: Magnetic Resonance in Medicine: Official Journal of the Society of Magnetic Resonance in Medicine
Julio Urrutia, Pablo Besa, Daniel Lobos, Marcelo Andia, Cristobal Arrieta, Sergio Uribe
PURPOSE: Lumbar paraspinal muscle morphology has recently been evaluated in several studies with conflicting results. Several studies have performed single-slice evaluations of paraspinal muscle morphology, whereas other studies have done a multi-level assessment; this methodological difference might explain the observed different results. Our study evaluated if a single-slice axial measurement is representative of the entire lumbar musculature. METHODS: We included 80 adult patients who were consecutively evaluated with magnetic resonance imaging (MRI) for spinal symptoms...
February 23, 2018: Skeletal Radiology
I Barchetta, F A Cimini, R De Gioannis, G Ciccarelli, L Bertoccini, A Lenzi, M G Baroni, M G Cavallo
AIMS: Procollagen-III peptide (PIIINP) is a marker of fibrosis associated with increased cardio-metabolic risk and progression of chronic liver diseases such as non-alcoholic fatty liver disease (NAFLD) and steatohepatitis (NASH); its association with type 2 diabetes mellitus has not been elucidated yet. Aim of this study was to investigate the relationship between circulating PIIINP levels, metabolic traits and body fat distribution in subjects with T2DM with or without NAFLD. MATERIALS AND METHODS: Data from sixty-two T2DM subjects recruited in our Diabetes outpatient clinics at Sapienza University of Rome, Italy, were analysed...
February 22, 2018: Diabetes/metabolism Research and Reviews
Huimin Lin, Hongjiang Wei, Naying He, Caixia Fu, Shu Cheng, Jun Shen, Baisong Wang, Xu Yan, Chunlei Liu, Fuhua Yan
PURPOSES: To evaluate the feasibility of simultaneous quantification of liver iron concentration (LIC) and fat fraction (FF) using water-fat separation and quantitative susceptibility mapping (QSM). METHODS: Forty-five patients suspected of liver iron overload (LIO) were included. A volumetric interpolated breath-hold examination sequence for QSM and FF, a fat-saturated gradient echo sequence for R2 * , a spin echo sequence for LIC measurements and MRS analyses for FF (FF-MRS) were performed...
February 22, 2018: European Radiology
O V Stukalova, N A Mironova, S P Golitsyn, O P Aparina, D V Parkhomenko, E Y Strazdenj, S K Ternovoy
BACKGROUND: in the recent years, there has been an increasing number of publications postulating that data on left atrial (LA) structure obtained by late gadolinium enhancement magnetic resonance imaging (LGE MRI) can improve the management of patients with atrial fibrillation (AF). At the same time, similar data regarding healthy LA myocardium is limited. AIM: to assess structural and functional properties of LA in healthy volunteers (HV) using cardiac magnetic resonance (CMR) (including LGE MRI); to compare these properties in patients with AF and HV...
September 2017: Kardiologiia
Yuan-Cheng Wang, Yinglian Feng, Chun-Qiang Lu, Shenghong Ju
OBJECTIVE: To investigate the renal fat fraction and water molecular diffusion features in patients with early-stage DN using Dixon imaging and diffusion tensor imaging (DTI). METHODS: Sixty-one type 2 diabetics (normoalbuminuria: n = 40; microalbuminuria: n = 21) and 34 non-diabetic volunteers were included. All participants received three-point Dixon imaging and DTI using a 3.0-T magnetic resonance imager. The fat fraction [FF] and DTI features [fractional anisotropy (FA), apparent diffusion coefficient (ADC), tract counts and length from DTI tractography] were collected...
February 15, 2018: European Radiology
Jeeyoung Min, Hee Sun Park, Young Jun Kim, Mi Hye Yu, Sung Il Jung, Hae Jeong Jeon
PURPOSE: To evaluate modified Dixon MRI techniques in hepatic fat estimation and to assess the effect of cirrhosis. METHODS: 235 patients who underwent liver MRI were included. Correlation between modified Dixon techniques with MRS was assessed. Accuracy of MR techniques in hepatic fat estimation was calculated, and the result was compared between patients with/without liver cirrhosis. RESULTS: Correlation between modified Dixon and MRS was better in group without liver cirrhosis, and accuracy of modified Dixon method was higher in group without liver cirrhosis...
February 7, 2018: Clinical Imaging
Junmin Liu, Spencer D Christiansen, Maria Drangova
Multi-echo gradient echo (mGRE) sequences have been widely adapted in clinical and scientific practice for different purposes to their capability of performing Dixon MRI, generating multi-contrast images and extracting multi-parametric maps. This work aims to extend mGRE-based techniques for imaging whole head, where further technical developments are required due to the co-existence of fat and large B0 inhomogeneity in regions such as the skull base and neck. Specifically, bipolar mGRE data were acquired with a single sequence that contains both a short echo-spacing (ΔTE) echo train to capture water-fat and B0 phase shifts (for proton density fat-fraction (FF) and B0 mapping) and a longer ΔTE echo train (and long echo times) to capture subtle susceptibility variations and R2* information...
February 13, 2018: NeuroImage
Kevin J Sinclair, Lanette J Friesen-Waldner, Colin M McCurdy, Curtis N Wiens, Trevor P Wade, Barbra de Vrijer, Timothy R H Regnault, Charles A McKenzie
PURPOSE: To examine the feasibility of using MRI to identify differences in liver size and fat deposition in fetal guinea pigs exposed to an in utero environment influenced by maternal consumption of a Western diet. MATERIALS AND METHODS: Female guinea pigs fed either an energy-dense Western Diet (WD), comprised of increased saturated fats and simple sugars, or a Control Diet (CD) from weaning through pregnancy, underwent MR scanning near term (~ 60 days; term ~ 69 days)...
2018: PloS One
C Monnereau, S Santos, A van der Lugt, V W V Jaddoe, J F Felix
BACKGROUND: Genome-wide association studies (GWASs) identified single-nucleotide polymorphisms (SNPs) involved in adult fat distribution. Whether these SNPs also affect abdominal and organ-specific fat accumulation in children is unknown. METHODS: In a population-based prospective cohort study among 1995 children (median age: 9.8 years, 95% range 9.4-10.8), we tested the associations of six genetic risk scores based on previously identified SNPs for childhood body mass index (BMI), adult BMI, liver fat, waist-hip ratio, pericardial fat mass, visceral and subcutaneous adipose tissue ratio (VAT/SAT ratio) and four individual SAT- and VAT-associated SNPs for association with SAT (N=1746), VAT (N=1742), VAT/SAT ratio (N=1738), liver fat fraction (N=1950) and pericardial fat mass (N=1803) measured by magnetic resonance imaging...
December 7, 2017: International Journal of Obesity: Journal of the International Association for the Study of Obesity
Adam M Lubert, Jimmy C Lu, Albert P Rocchini, Mark D Norris, Sunkyung Yu, Prachi P Agarwal, Maryam Ghadimi Mahani, Adam L Dorfman
Epicardial fat produces multiple proinflammatory cytokines and is associated with adverse cardiovascular events. Inflammation and resultant endothelial dysfunction may play a role in progressive myocardial dysfunction among adults with single ventricle physiology after Fontan palliation, but the potential impact of increased epicardial fat volume (EFV) has not been studied. This study sought to determine if there is greater EFV in Fontan patients compared with a group of repaired tetralogy of Fallot (rTOF) patients...
January 9, 2018: American Journal of Cardiology
O Sorop, I Heinonen, M van Kranenburg, J van de Wouw, V J de Beer, T N Nguyen, Y Octavia, R W B van Duin, K Stam, R J van Geuns, P A Wielopolski, G P Krestin, A H van den Meiracker, R Verjans, M van Bilsen, A H J Danser, W J Paulus, C Cheng, W A Linke, J A Joles, M C Verhaar, J van der Velden, D Merkus, D J Duncker
Rationale: More than 50% of patients with heart failure have preserved ejection fraction characterized by diastolic dysfunction. The prevalance of diastolic dysfunction is higher in females and associates with multiple comorbidities such as hypertension (HT), obesity, hypercholesterolemia (HC) and diabetes mellitus (DM), although its pathophysiology remains incompletely understood. It has been proposed that the co-morbidities induce systemic inflammation, cardiac microvascular dysfunction and oxidative stress, leading to myocardial fibrosis, myocyte stiffening and ultimately, diastolic dysfunction...
February 8, 2018: Cardiovascular Research
Tatsuya Hayashi, Kei Fukuzawa, Hidekazu Yamazaki, Takashi Konno, Tosiaki Miyati, Jun'ichi Kotoku, Hiroshi Oba, Hiroshi Kondo, Keiko Toyoda, Satoshi Saitoh
PURPOSE: To evaluate the reproducibility of proton density fat fraction (PDFF) and T2* in a fat-water phantom on three different 3 T MRI systems using 6-point DIXON methods. METHODS: A phantom which included varying fat volume percentages (true fat fraction [FF]) was scanned by three 3 T MR machines, and PDFF and T2* were measured. RESULTS: The mean difference between true FF and PDFF was small in all vendors (-2.11% to 0.41%). However, the difference ratio for T2* values was large among vendors (1...
February 2, 2018: Clinical Imaging
T Tada, T Kumada, H Toyoda, Y Sone, K Takeshima, S Ogawa, T Goto, A Wakahata, M Nakashima, M Nakamuta, J Tanaka
BACKGROUND: Whether direct-acting anti-viral therapy can reduce liver fibrosis and steatosis in patients with chronic hepatitis C virus (HCV) infection is unclear. AIMS: To evaluate changes in liver stiffness and steatosis in patients with HCV who received direct-acting anti-viral therapy and achieved sustained virological response (SVR). METHODS: A total of 198 patients infected with HCV genotype 1 or 2 who achieved SVR after direct-acting anti-viral therapy were analysed...
February 9, 2018: Alimentary Pharmacology & Therapeutics
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