abstract：:The ability to evaluate empirical diffusion MRI acquisitions for quality and to correct the resulting imaging metrics allows for improved inference and increased replicability. Previous work has shown promise for estimation of bias and variance of generalized fractional anisotropy (GFA) but comes at the price of compu...

journal_title：Magnetic resonance imaging

authors： Hainline AE,Nath V,Parvathaneni P,Schilling KG,Blaber JA,Anderson AW,Kang H,Landman BA

更新日期：2019-06-01 00:00:00

abstract：:Image artifacts due to 14 gauge radiotherapy electromagnetic (EM) transponders were assessed on conventional spin echo images, and corrected using metal artifact reduction techniques: high bandwidth, view angle tilting (VAT), and slice encoding for metal artifact correction (SEMAC). Large areas of signal loss and/or p...

journal_title：Magnetic resonance imaging

authors： Bergen RV,Ryner L

更新日期：2019-06-01 00:00:00

abstract：:A series of direct shear and nuclear magnetic resonance (NMR) tests were performed on a compacted weakly expansive clay saturated by sodium chloride (NaCl) solutions with different concentrations to study the effect of NaCl solution on the shear strength and its mechanism. Results from the direct shear tests show that...

journal_title：Magnetic resonance imaging

authors： Yu H,Sun D,Tian H

更新日期：2019-05-01 00:00:00

abstract：PURPOSE:The state-of-the-art method to quantify sodium concentrations in vivo consists in a fully relaxed 3D spin-density (SD) weighted acquisition. Nevertheless, most sodium MRI clinical studies use short-TR SD acquisitions to reduce acquisition durations. We present a clinically viable implementation of the Variable ...

journal_title：Magnetic resonance imaging

authors： Coste A,Boumezbeur F,Vignaud A,Madelin G,Reetz K,Le Bihan D,Rabrait-Lerman C,Romanzetti S

更新日期：2019-05-01 00:00:00

abstract：BACKGROUND:The molecular structure, charge, thermodynamic and kinetic stability are approximately the same for gadodiamide and gadoversetamide, the main substantive difference is that gadodiamide is manufactured with 5% free ligand to form Omniscan® and gadoversetamide with 10% free ligand to form OptiMARK®. PURPOSE:T...

journal_title：Magnetic resonance imaging

authors： Semelka RC,Prybylski JP,Ramalho M

更新日期：2019-05-01 00:00:00

abstract：OBJECTIVES:To compare the accuracy of contrast-enhanced ultrasound (CEUS) and Dynamic contrast-enhanced (DCE) magnetic resonance imaging (MRI) for the assessment of changes in tissue vascularization as result of sorafenib treatment in a rat model of hepatocellular carcinoma (HCC). METHODS:Male Buffalo rats with orthot...

journal_title：Magnetic resonance imaging

authors： Muñoz NM,Minhaj AA,Maldonado KL,Kingsley CV,Cortes AC,Taghavi H,Polak U,Mitchell JM,Ensor JE,Bankson JA,Rashid A,Avritscher R

更新日期：2019-04-01 00:00:00

abstract：:The sensitivity of multiple diffusion MRI (dMRI) parameters to longitudinal changes in white matter microstructure was investigated for the 3xTg-AD transgenic mouse model of Alzheimer's disease, which manifests both amyloid beta plaques and neurofibrillary tangles. By employing a specific dMRI method known as diffusio...

journal_title：Magnetic resonance imaging

authors： Nie X,Falangola MF,Ward R,McKinnon ET,Helpern JA,Nietert PJ,Jensen JH

更新日期：2019-04-01 00:00:00

abstract：:Perfusion magnetic resonance imaging (MRI) is a promising non-invasive technique providing insights regarding the brain's microvascular architecture in vivo. The scalar perfusion metrics can be used for quantitative diagnostics of various brain abnormalities, in particular, in the stroke cases and tumours. However, co...

journal_title：Magnetic resonance imaging

authors： Maximov II,Vellmer S

更新日期：2019-04-01 00:00:00

abstract：PURPOSE:Our study aimed to develop accelerated microscopic diffusional kurtosis imaging (μDKI) and preliminarily evaluated it in a rodent model of chronic epilepsy. METHODS:We investigated two μDKI acceleration schemes of reduced sampling density and angular range in a phantom and wild-type rats, and further tested μD...

journal_title：Magnetic resonance imaging

authors： Ji Y,Lu D,Wu L,Qiu B,Song YQ,Sun PZ

更新日期：2019-02-01 00:00:00

abstract：:We propose a deuterium diffusion tracer approach to measure diffusion coefficient in the case of very short NMR relaxation times, too short for NMR pulsed field gradient sequences (T1 or T2 below 1 ms). We also treat the case of porous media containing metallic fibers (such as reinforced concrete) strongly disturbing ...

journal_title：Magnetic resonance imaging

authors： Fleury M,Berthe G,Chevalier T

更新日期：2019-02-01 00:00:00

abstract：:We have applied diffusion and relaxation Nuclear Magnetic Resonance experiments to investigate the translational and rotational mobility of adsorbents on quartz and calcite mineral surfaces. On both surfaces it was found that water is the dominant molecule. On the quartz surface the majority of water molecules have a ...

journal_title：Magnetic resonance imaging

authors： Sørgård HN,Totland C,Nerdal W,Seland JG

更新日期：2019-02-01 00:00:00

abstract：OBJECTIVE:To investigate T2 mapping as a possible marker for low-grade human articular cartilage lesions during a one-year follow-up, possible changes during the follow-up and compare the reliability and sensitivity of these measurements on high-field (3 T) and ultra-high-field (7 T) MRI scanners. DESIGN:Twenty-one pa...

journal_title：Magnetic resonance imaging

authors： Juras V,Schreiner M,Laurent D,Zbýň Š,Mlynarik V,Szomolanyi P,Hager B,Scotti C,Goldhahn J,Heule R,Bieri O,Trattnig S

更新日期：2019-01-01 00:00:00

abstract：BACKGROUND:Doppler based mitral annular velocities are an integral part of echocardiographic left ventricular diastolic function assessment. Although these measurements can be obtained by phase contrast cardiac magnetic resonance imaging (PC-CMR), this approach has limitations. The aims of this study were to assess the...

journal_title：Magnetic resonance imaging

authors： Thavendiranathan P,Guetter C,da Silveira JS,Lu X,Scandling D,Xue H,Jolly MP,Raman SV,Simonetti OP

更新日期：2019-01-01 00:00:00

abstract：BACKGROUND AND PURPOSE:Slice-encoding metal artifact corrections (SEMAC)-view-angle tilting (VAT) sequences have recently been used in clinical protocols to reduce metal artifacts in MR scans of patients with spinal instrumentation. The objective of this study was to compare the SEMAC-VAT sequence with the conventional...

journal_title：Magnetic resonance imaging

authors： Park C,Lee E,Yeo Y,Kang Y,Lee JW,Ahn JM,Kang HS

更新日期：2018-12-01 00:00:00

abstract：:Many algorithms have been proposed for automated segmentation of white matter hyperintensities (WMH) in brain MRI. Yet, broad uptake of any particular algorithm has not been observed. In this work, we argue that this may be due to variable and suboptimal validation data and frameworks, precluding direct comparison of ...

journal_title：Magnetic resonance imaging

authors： Knight J,Taylor GW,Khademi A

更新日期：2018-12-01 00:00:00

abstract：:Prostate MRI is an important tool to diagnose and characterize cancer. High local sensitivity and good parallel imaging performance are of paramount importance for diagnostic quality and efficiency. The purpose of this work was to evaluate stacked resonators as part of a surface receiver array for prostate MRI at 3 Te...

journal_title：Magnetic resonance imaging

authors： Chacon-Caldera J,Fischer A,Malzacher M,Vetter Y,Davids M,Flöser M,Stumpf C,Schad LR

更新日期：2018-11-01 00:00:00

abstract：PURPOSE:To provide a single open-source platform for comprehensive MR algorithm development inclusive of simulations, pulse sequence design and deployment, reconstruction, and image analysis. METHODS:We integrated the "Pulseq" platform for vendor-independent pulse programming with Graphical Programming Interface (GPI)...

journal_title：Magnetic resonance imaging

authors： Ravi KS,Potdar S,Poojar P,Reddy AK,Kroboth S,Nielsen JF,Zaitsev M,Venkatesan R,Geethanath S

更新日期：2018-10-01 00:00:00

abstract：INTRODUCTION:Pharmacokinetic parameters derived from dynamic contrast-enhanced MRI (DCE-MRI) data are sensitive to acquisition and post-processing techniques, which makes it difficult to compare results obtained using different methods. In particular, one of the most important factors affecting estimation of model para...

journal_title：Magnetic resonance imaging

authors： Wake N,Chandarana H,Rusinek H,Fujimoto K,Moy L,Sodickson DK,Kim SG

更新日期：2018-10-01 00:00:00

abstract：PURPOSE:To analyze several histopathological features and their possible correlations with whole lesion histogram analysis derived from ADC maps in meningioma. MATERIALS AND METHODS:The retrospective study involved 36 patients with primary meningiomas. For every tumor, the following histogram analysis parameters of ap...

journal_title：Magnetic resonance imaging

authors： Surov A,Hamerla G,Meyer HJ,Winter K,Schob S,Fiedler E

更新日期：2018-09-01 00:00:00

abstract：PURPOSE:To evaluate the reproducibility of quantitative diffusion measurements obtained with reduced Field of View (rFOV) and Multi-shot EPI (msEPI) acquisitions, using single-shot EPI (ssEPI) as a reference. METHODS:Diffusion phantom experiments, and prostate diffusion-weighted imaging in healthy volunteers and patie...

journal_title：Magnetic resonance imaging

authors： Zhang Y,Holmes J,Rabanillo I,Guidon A,Wells S,Hernando D

更新日期：2018-09-01 00:00:00

abstract：PURPOSE:Lower fat fraction (FF) in brown adipose tissue (BAT) than white adipose tissue (WAT) has been exploited using Dixon-based Magnetic Resonance Imaging (MRI) to differentiate these tissues in rodents, human infants and adults. We aimed to determine whether an optimal FF threshold could be determined to differenti...

journal_title：Magnetic resonance imaging

authors： Jones TA,Wayte SC,Reddy NL,Adesanya O,Dimitriadis GK,Barber TM,Hutchinson CE

更新日期：2018-09-01 00:00:00

abstract：PURPOSE:To develop a protocol to non-invasively measure and map fat fraction, fat/(fat+water), as a function of age in the adult thymus for future studies monitoring the effects of interventions aimed at promoting thymic rejuvenation and preservation of immunity in older adults. MATERIALS AND METHODS:Three-dimensional...

journal_title：Magnetic resonance imaging

authors： Fishbein KW,Makrogiannis SK,Lukas VA,Okine M,Ramachandran R,Ferrucci L,Egan JM,Chia CW,Spencer RG

更新日期：2018-07-01 00:00:00

abstract：PURPOSE:To evaluate the utility of fat fraction (FF) for the differentiation of different breast tissues and in various breast tumor subtypes using in vivo proton (1H) magnetic resonance spectroscopy (MRS). METHODS:1H MRS was performed on 68 malignant, 35 benign, and 30 healthy volunteers at 1.5 T. Malignant breast ti...

journal_title：Magnetic resonance imaging

authors： Agarwal K,Sharma U,Mathur S,Seenu V,Parshad R,Jagannathan NR

更新日期：2018-06-01 00:00:00

abstract：:Neurovascular coupling describes the cascade between neuronal activity and subsequent Blood-Oxygenation-Level-Dependent (BOLD) signal increase. Based on this premise, the correlation of this BOLD signal increase with a particular task, such as finger-tapping, is used to map neuronal activation. This signal increase ma...

journal_title：Magnetic resonance imaging

authors： van Niftrik CHB,Piccirelli M,Bozinov O,Maldaner N,Strittmatter C,Pangalu A,Valavanis A,Regli L,Fierstra J

更新日期：2018-06-01 00:00:00

abstract：PURPOSE:To evaluate the correlation between the pancreatic exocrine insufficiency estimated by cine-dynamic MRCP using spatially selective IR pulse and the severity stages (modified Cambridge classification) based on morphological changes of the pancreatic duct in patients with suspected chronic pancreatitis. MATERIAL...

journal_title：Magnetic resonance imaging

authors： Yasokawa K,Ito K,Kanki A,Yamamoto A,Torigoe T,Sato T,Tamada T

更新日期：2018-05-01 00:00:00

abstract：:The purpose of this study is to illustrate motion correction in Musculoskeletal (MSK) Magnetic Resonance Imaging (MRI) through utilization of information from an optical tracker to capture the extent and instant of motion. A Digital Single Lens Reflexive camera is employed as the optical tracker to capture the extent ...

journal_title：Magnetic resonance imaging

authors： Chikop SA,Anchan ABS,Koulagi G,Honnedevasthana AA,Imam S,Geethanath S

更新日期：2018-05-01 00:00:00

abstract：PURPOSE:While PRESS is often employed to measure glutamate concentrations, MEGA-PRESS enables simultaneous Glx (glutamate and glutamine) and GABA measurements. This study aimed to compare validation, repeatability, and concordance of different approaches for glutamate quantification at 3T to aid future studies in their...

journal_title：Magnetic resonance imaging

authors： van Veenendaal TM,Backes WH,van Bussel FCG,Edden RAE,Puts NAJ,Aldenkamp AP,Jansen JFA

更新日期：2018-05-01 00:00:00

abstract：PURPOSE:In this study we proposed a fully automated method for localizing and segmenting the ascending aortic lumen with phase-contrast magnetic resonance imaging (PC-MRI). MATERIAL AND METHODS:Twenty-five phase-contrast series were randomly selected out of a large population dataset of patients whose cardiac MRI exam...

journal_title：Magnetic resonance imaging

authors： Codari M,Scarabello M,Secchi F,Sforza C,Baselli G,Sardanelli F

更新日期：2018-04-01 00:00:00

abstract：PURPOSE:To provide a comprehensive understanding of multi-shot EPI diffusion imaging methods by comparing Readout segmented EPI (RS-EPI) and interleaved EPI (iEPI). MATERIALS AND METHODS:RS-EPI and iEPI were compared on the same 3T scanner. A 2D navigator was used for both RS-EPI and iEPI for phase correction. Signal ...

journal_title：Magnetic resonance imaging

authors： Wang Y,Ma X,Zhang Z,Dai E,Jeong HK,Xie B,Yuan C,Guo H

更新日期：2018-04-01 00:00:00

abstract：PURPOSE:To develop a method for mapping the B1 transmit (B1t) and B1 receive (B1r) fields from two gradient echo datasets each with a different flip angle and from these two images obtain accurate T1 and proton density (PD) maps of the brain. METHODS:A strategically acquired gradient echo (STAGE) data set is collected...

journal_title：Magnetic resonance imaging

authors： Wang Y,Chen Y,Wu D,Wang Y,Sethi SK,Yang G,Xie H,Xia S,Haacke EM

更新日期：2018-02-01 00:00:00

abstract：:A four-channel Tic-Tac-Toe (TTT) transmit RF coil was designed and constructed for foot and ankle imaging at 7T MRI. Numerical simulations using an in-house developed FDTD package and experimental analyses using a homogenous phantom show an excellent agreement in terms of B1+ field distribution and s-parameters. Simul...

journal_title：Magnetic resonance imaging

authors： Santini T,Kim J,Wood S,Krishnamurthy N,Farhat N,Maciel C,Raval SB,Zhao T,Ibrahim TS

更新日期：2018-01-01 00:00:00

abstract：INTRODUCTION:Previous investigations of test-retest reliability of cerebral blood flow (CBF) at rest measured with pseudo-continuous Arterial Spin Labeling (pCASL) demonstrated good reliability, but are limited by the use of similar scanner platforms. In the present study we examined test-retest reliability of CBF in r...

journal_title：Magnetic resonance imaging

authors： Almeida JRC,Greenberg T,Lu H,Chase HW,Fournier JC,Cooper CM,Deckersbach T,Adams P,Carmody T,Fava M,Kurian B,McGrath PJ,McInnis MG,Oquendo MA,Parsey R,Weissman M,Trivedi M,Phillips ML

更新日期：2018-01-01 00:00:00

abstract：PURPOSE:To develop a technique for three dimensional (3D) high resolution joint imaging of intracranial and extracranial arterial walls with improved cerebrospinal fluid (CSF) suppression and good blood suppression based on T1 weighted sampling perfection with application optimized contrast using different angle evolut...

journal_title：Magnetic resonance imaging

authors： Zhang L,Zhang N,Wu J,Liu X,Chung YC

更新日期：2017-12-01 00:00:00

abstract：PURPOSE:We present three-dimensional adiabatic inversion recovery prepared ultrashort echo time Cones (3D IR-UTE-Cones) imaging of cortical bone in the hip of healthy volunteers using a clinical 3T scanner. METHODS:A 3D IR-UTE-Cones sequence, based on a short pulse excitation followed by a 3D Cones trajectory, with a ...

journal_title：Magnetic resonance imaging

authors： Nazaran A,Carl M,Ma Y,Jerban S,Zhu Y,Lu X,Du J,Chang EY

更新日期：2017-12-01 00:00:00

abstract：PURPOSE:To implement and evaluate interleaved blip-up, blip-down, non-segmented 3D echo planar imaging (EPI) with pseudo-continuous arterial spin labeling (pCASL) and post-processing for reduced susceptibility artifact cerebral blood flow (CBF) maps. MATERIALS AND METHODS:3D EPI non-segmented acquisition with a pCASL ...

journal_title：Magnetic resonance imaging

authors： Gai ND,Chou YY,Pham D,Butman JA

更新日期：2017-12-01 00:00:00

abstract：PURPOSE:To establish an optimized sequence design for fast acceleration of arterial spin labeling (ASL)-based time-resolved magnetic resonance angiography (MRA) by acquisition of control and labeled images in the same shot (fast ACTRESS) and a scan time of <1min, for the evaluation of intracranial vessels. MATERIALS A...

journal_title：Magnetic resonance imaging

authors： Sugimori H,Fujima N,Suzuki Y,Hamaguchi H,Ishizaka K,Kudo K

更新日期：2017-11-01 00:00:00

abstract：PURPOSE:To evaluate the performance of combined integrated slice-by-slice shimming and readout-segmented EPI (irsEPI) for diffusion-weighted MR imaging (DWI) of the neck at 3Tesla. METHODS:This study was approved by the local ethics committee. An anthropometric phantom of the head/neck region incorporating compartment...

journal_title：Magnetic resonance imaging

authors： Walter SS,Liu W,Stemmer A,Martirosian P,Nikolaou K,Notohamiprodjo M,Gatidis S

更新日期：2017-10-01 00:00:00

abstract：:Atherosclerotic plaques in the bifurcation of the carotid arteries can pose a significant health risk due to possible plaque rupture and subsequent stroke. The assessment of plaques, and evaluation of the risk they pose, can be performed with Black-Blood (BB) vessel wall magnetic resonance imaging. However, resolution...

journal_title：Magnetic resonance imaging

authors： Papoutsis K,Li L,Near J,Payne S,Jezzard P

更新日期：2017-07-01 00:00:00

abstract：:The density driven convection phenomenon is expected to have a significant and positive role in CO2 geological storage capacity and safety. The onset and development of density-driven convective on the core scale is critical to understand the mass transfer mechanism. In this paper, laboratory experiments were conducte...

journal_title：Magnetic resonance imaging

authors： Teng Y,Jiang L,Fan Y,Liu Y,Wang D,Abudula A,Song Y

更新日期：2017-06-01 00:00:00

abstract：:The prevalence of cartilage lesions is much higher in football athletes than in the general population. Delayed gadolinium-enhanced MRI of cartilage (dGEMRIC) has been shown to quantify regional variations of glycosaminoglycan (GAG) concentrations which is an indicator of early cartilage degeneration. The goal of this...

journal_title：Magnetic resonance imaging

authors： Wei W,Lambach B,Jia G,Flanigan D,Chaudhari AMW,Wei L,Rogers A,Payne J,Siston RA,Knopp MV

更新日期：2017-06-01 00:00:00