A hybrid (iron –fat–water) phantom for liver iron overload quantification in the presence of contaminating fat using magnetic resonance imaging
This study proposes a phantom design concomitantly containing various concentrations of iron and fat suitable for devising accurate simultaneousT2* and fat quantification technique.Materials and methodsA 46-vial iron –fat–water phantom with various iron concentrations covering clinically relevantT2* relaxation time values, from healthy to severely overloaded liver and wide fat percentages ranges from 0 to 100% was prepared. The phantom was constructed using insoluble iron (II, III) oxide powder containing microscale particles.T2*-weighted imaging using multi-gradient-echo (mGRE) sequence, and chemical shift ima...
Source: Magnetic Resonance Materials in Physics, Biology and Medicine - November 16, 2019 Category: Materials Science Source Type: research

Multi-stage automated local arterial input function selection in perfusion MRI
ConclusionThe results suggest the proposed solution provides a more robust approach to perfusion quantification than currently available fully automated local AIF methods. (Source: Magnetic Resonance Materials in Physics, Biology and Medicine)
Source: Magnetic Resonance Materials in Physics, Biology and Medicine - November 13, 2019 Category: Materials Science Source Type: research

Consensus-based technical recommendations for clinical translation of renal diffusion-weighted MRI
DiscussionThe consensus-based technical recommendations for renal DWI aim to facilitate inter-site harmonization and increase clinical impact of the technique on a larger scale by setting a framework for acquisition protocols for future renal DWI studies. We anticipate an iterative process with continuous updating of the recommendations according to progress in the field. (Source: Magnetic Resonance Materials in Physics, Biology and Medicine)
Source: Magnetic Resonance Materials in Physics, Biology and Medicine - November 1, 2019 Category: Materials Science Source Type: research

Correction to: Semi-automatic segmentation from intrinsically-registered 18F-FDG –PET/MRI for treatment response assessment in a breast cancer cohort: comparison to manual DCE–MRI
The original version of this article unfortunately contained a mistake in Fig.  6. (Source: Magnetic Resonance Materials in Physics, Biology and Medicine)
Source: Magnetic Resonance Materials in Physics, Biology and Medicine - October 29, 2019 Category: Materials Science Source Type: research

Dynamic MR imaging of the skeletal muscle in young and senior volunteers during synchronized minimal neuromuscular electrical stimulation
In conclusion, NMES-synchronized MRI could be successfully applied in senior volunteers with strain results clearly different from the younger volunteers. Also, differences within the senior group were detected both in the magnitude of strain and in the position of maximum strain pixels. (Source: Magnetic Resonance Materials in Physics, Biology and Medicine)
Source: Magnetic Resonance Materials in Physics, Biology and Medicine - October 24, 2019 Category: Materials Science Source Type: research

Measuring geometric accuracy in magnetic resonance imaging with 3D-printed phantom and nonrigid image registration
DiscussionUsing nonrigid CT –MR registration can provide a robust and relatively test-object-agnostic method for estimating the intra- and inter-scanner variations of the geometric distortions. (Source: Magnetic Resonance Materials in Physics, Biology and Medicine)
Source: Magnetic Resonance Materials in Physics, Biology and Medicine - October 23, 2019 Category: Materials Science Source Type: research

Technical recommendations for clinical translation of renal MRI: a consensus project of the Cooperation in Science and Technology Action PARENCHIMA
ConclusionThe process generated meaningful technical recommendations across very different MRI methods, while allowing for improvement and refinement as open issues are resolved. The results are likely to be widely supported by the renal MRI community and thereby promote more harmonisation. (Source: Magnetic Resonance Materials in Physics, Biology and Medicine)
Source: Magnetic Resonance Materials in Physics, Biology and Medicine - October 18, 2019 Category: Materials Science Source Type: research

Intravascular signal suppression and microvascular signal mapping using delays alternating with nutation for tailored excitation (DANTE) pulse for arterial spin labeling perfusion imaging
DiscussionAn optimized DANTE makes it possible to efficiently suppress the macro-and-micro vascular signals depending on the flow velocity. Moreover, macrovascular signal mapping may be useful to assess altered hemodynamic states. (Source: Magnetic Resonance Materials in Physics, Biology and Medicine)
Source: Magnetic Resonance Materials in Physics, Biology and Medicine - October 17, 2019 Category: Materials Science Source Type: research

Quantification of sodium T1 in abdominal tissues at 3  T
Discussion23Na-T1 quantification using a SR-TrueFISP is feasible in clinical settings, in the images constrained by clinically applicable acquisition time of reduced spatial resolution or averages. (Source: Magnetic Resonance Materials in Physics, Biology and Medicine)
Source: Magnetic Resonance Materials in Physics, Biology and Medicine - October 17, 2019 Category: Materials Science Source Type: research

Determination of oxygen r 1 at 3 Tesla using samples with a concentration range of dissolved oxygen
ConclusionMOLLIT1-mapping sequences may be used for detecting dissolved oxygen in vivo at 3  T with an\(\hat{r}_{1}\) in the range 4.18 –4.8 × 10−3 s−1 mg−1 L and a corresponding LOD for dissolved oxygen of approximately 10 mg L−1. MOLLI-basedT1 mapping may be a useful non-invasive tool for quantification of in vivo changes of DO concentration during oxygen challenges. (Source: Magnetic Resonance Materials in Physics, Biology and Medicine)
Source: Magnetic Resonance Materials in Physics, Biology and Medicine - October 12, 2019 Category: Materials Science Source Type: research

Image registration in dynamic renal MRI —current status and prospects
AbstractMagnetic resonance imaging (MRI) modalities have achieved an increasingly important role in the clinical work-up of chronic kidney diseases (CKD). This comprises among others assessment of hemodynamic parameters by arterial spin labeling (ASL) or dynamic contrast-enhanced (DCE-) MRI. Especially in the latter, images or volumes of the kidney are acquired over time for up to several minutes. Therefore, they are hampered by motion, e.g., by pulsation, peristaltic, or breathing motion. This motion can hinder subsequent image analysis to estimate hemodynamic parameters like renal blood flow or glomerular filtration rate...
Source: Magnetic Resonance Materials in Physics, Biology and Medicine - October 9, 2019 Category: Materials Science Source Type: research

An MRI study of solute transport in the intervertebral disc
ConclusionThe MRI technique provides high-quality quantitative data which correspond well to theoretical predictions, allowing values for partition coefficient and time constant to be readily determined. These measurements provide information to underpin similar studies in vivo and may be used as a model for the transport of nutrients and pharmaceutical agents in the disc. (Source: Magnetic Resonance Materials in Physics, Biology and Medicine)
Source: Magnetic Resonance Materials in Physics, Biology and Medicine - October 4, 2019 Category: Materials Science Source Type: research

Severe pulmonary regurgitation in adolescents with tetralogy of Fallot leads to increased longitudinal strain
AbstractObjectivesPostoperative patients with tetralogy of Fallot (TOF) are often compromised by chronic pulmonary regurgitation and chronic right ventricular volume load. We sought to determine whether pulmonary regurgitation (PR) would affect right and left ventricle (RV and LV) strain.Materials and methodsThis cross-sectional analysis included 40 patients who had TOF with surgical repair, with an average follow-up period of 11.8  ± 3.0 years. Altogether, 44 healthy volunteers with similar age and gender distribution were recruited. A cardiovascular magnetic resonance imaging study with feature ...
Source: Magnetic Resonance Materials in Physics, Biology and Medicine - October 3, 2019 Category: Materials Science Source Type: research

Optimization of intravoxel incoherent motion (IVIM): variability of parameters measurements using a reduced distribution of b values for breast tumors analysis
This study aimed to examine the variability of intravoxel incoherent motion measurements acquired from reduced distributions ofb values for breast tumors analysis.Materials and methodsThe investigations were carried out on twenty-four patients with diagnosed breast tumors. A conventional unenhanced MRI and various IVIM series preset with different distributions ofb values (0 –1000 s/mm2) were performed. We assessed the variability inDslow,Dfast, and PF measurements for different distributions of 9 to 4b values compared with the IVIM metrics for 10b values using Wilcoxon-Signed rank test. The data was statistical...
Source: Magnetic Resonance Materials in Physics, Biology and Medicine - September 30, 2019 Category: Materials Science Source Type: research

Semi-automatic segmentation from intrinsically-registered 18F-FDG –PET/MRI for treatment response assessment in a breast cancer cohort: comparison to manual DCE–MRI
DiscussionUsing PET/MRI, tumor area and mean ADC value estimated with a GMM –PET can replicate manual DCE tumor definition from MRI for monitoring neoadjuvant treatment response in breast cancer. (Source: Magnetic Resonance Materials in Physics, Biology and Medicine)
Source: Magnetic Resonance Materials in Physics, Biology and Medicine - September 27, 2019 Category: Materials Science Source Type: research

The reproducibility of measurements using a standardization phantom for the evaluation of fractional anisotropy (FA) derived from diffusion tensor imaging (DTI)
DiscussionHigh reproducibility of measurements using a standardization phantom for the evaluation of FA was achieved. (Source: Magnetic Resonance Materials in Physics, Biology and Medicine)
Source: Magnetic Resonance Materials in Physics, Biology and Medicine - September 24, 2019 Category: Materials Science Source Type: research

Histogram analysis of apparent diffusion coefficients for predicting pelvic lymph node metastasis in patients with uterine cervical cancer
AbstractObjectiveTo investigate the value of apparent diffusion coefficient (ADC) histogram analysis in predicting pelvic lymph node (LN) metastasis in patients with cervical cancer undergoing surgery.Materials and methodsA total of 162 cervical cancer patients who underwent radical abdominal hysterectomy with pelvic LN dissection performed with pelvic 3  T-MRI including diffusion-weighted imaging were enrolled in this study. The ADC histogram variables (minimum, mean, median, 97.5th percentile [ADC97.5], and maximum) of the tumors were developed using in-house software. For predicting pelvic LN metastasis, clinical a...
Source: Magnetic Resonance Materials in Physics, Biology and Medicine - September 23, 2019 Category: Materials Science Source Type: research

Quantitative analysis of fetal magnetic resonance phantoms and recommendations for an anthropomorphic motion phantom
DiscussionCurrently available fetal phantoms lack accuracy and motion simulation. 3D printing may lead to higher accuracy compared with traditional manufacturing. Future research needs to focus on properly simulating both fetal anatomy and physiological motion to produce a phantom that is appropriate for fetal MRI sequence development and optimization. (Source: Magnetic Resonance Materials in Physics, Biology and Medicine)
Source: Magnetic Resonance Materials in Physics, Biology and Medicine - September 5, 2019 Category: Materials Science Source Type: research

A quantitative alternative to the Goutallier classification system using Lava Flex and Ideal MRI techniques: volumetric intramuscular fatty infiltration of the supraspinatus muscle, a cadaveric study
DiscussionThe Lava Flex technique, taking about 30% of the acquisition time, may prevent motion artifacts in outcomes associated with the longer Ideal IQ technique. However, potential magnetic field inhomogeneities should be considered. The Lava Flex technique may be a faster and valid alternative to the Goutallier classification system. (Source: Magnetic Resonance Materials in Physics, Biology and Medicine)
Source: Magnetic Resonance Materials in Physics, Biology and Medicine - September 4, 2019 Category: Materials Science Source Type: research

ESMRMB 2019, 36th Annual Scientific Meeting, Rotterdam, NL, October 3 –October 5: Abstracts, Saturday
(Source: Magnetic Resonance Materials in Physics, Biology and Medicine)
Source: Magnetic Resonance Materials in Physics, Biology and Medicine - September 1, 2019 Category: Materials Science Source Type: research

ESMRMB 2019, 36th Annual Scientific Meeting, Rotterdam, NL, October 3 –October 5: Author Index
(Source: Magnetic Resonance Materials in Physics, Biology and Medicine)
Source: Magnetic Resonance Materials in Physics, Biology and Medicine - September 1, 2019 Category: Materials Science Source Type: research

ESMRMB 2019, 36th Annual Scientific Meeting, Rotterdam, NL, October 3 –October 5: Abstracts, Friday
(Source: Magnetic Resonance Materials in Physics, Biology and Medicine)
Source: Magnetic Resonance Materials in Physics, Biology and Medicine - September 1, 2019 Category: Materials Science Source Type: research

ESMRMB 2019, 36th Annual Scientific Meeting, Rotterdam, NL, October 3 –October 5: Electronic Posters / Paper Posters / Clinical Review Posters / Software Exhibits
(Source: Magnetic Resonance Materials in Physics, Biology and Medicine)
Source: Magnetic Resonance Materials in Physics, Biology and Medicine - September 1, 2019 Category: Materials Science Source Type: research

ESMRMB 2019, 36th Annual Scientific Meeting, Rotterdam, NL, October 3 –October 5: Abstracts, Thursday
(Source: Magnetic Resonance Materials in Physics, Biology and Medicine)
Source: Magnetic Resonance Materials in Physics, Biology and Medicine - September 1, 2019 Category: Materials Science Source Type: research

Renal sinus fat and renal hemodynamics: a cross-sectional analysis
ConclusionsIn T2D patients, higher RSF volume was negatively associated to GFR. In addition, RSF volume was positively associated with increased renal vascular resistance, which may mediate hypertension and CKD development. Further research is needed to investigate how RSF may alter the (afferent) vascular resistance of the renal vasculature. (Source: Magnetic Resonance Materials in Physics, Biology and Medicine)
Source: Magnetic Resonance Materials in Physics, Biology and Medicine - August 31, 2019 Category: Materials Science Source Type: research

The advantages of radial trajectories for vessel-selective dynamic angiography with arterial spin labeling
AbstractObjectivesTo demonstrate the advantages of radialk-space trajectories over conventional Cartesian approaches for accelerating the acquisition of vessel-selective arterial spin labeling (ASL) dynamic angiograms, which are conventionally time consuming to acquire.Materials and methodsVessel-encoded pseudocontinuous ASL was combined with time-resolved balanced steady-state free precession (bSSFP) and spoiled gradient echo (SPGR) readouts to obtain dynamic vessel-selective angiograms arising from the four main brain-feeding arteries. Dynamic 2D protocols with acquisition times of one minute or less were achieved throug...
Source: Magnetic Resonance Materials in Physics, Biology and Medicine - August 17, 2019 Category: Materials Science Source Type: research

Phase-contrast magnetic resonance imaging to assess renal perfusion: a systematic review and statement paper
DiscussionRenal PC-MRI shows promise as a non-invasive technique to reliably measure RBF, both in healthy volunteers and in patients with renal disease. Future multicentric studies are needed to provide definitive normative ranges and to demonstrate the clinical potential of PC-MRI, likely as part of a multi-parametric renal MRI protocol. (Source: Magnetic Resonance Materials in Physics, Biology and Medicine)
Source: Magnetic Resonance Materials in Physics, Biology and Medicine - August 17, 2019 Category: Materials Science Source Type: research

Inductive measurement and encoding of k -space trajectories in MR raw data
The objective of this study was to concurrently acquire an inductivek-space trajectory measure and corresponding imaging data by an MR scanner.Materials and methods 1D gradient measures were obtained by digital integration, regularized using measured gradient coil currents and recorded individually by the scanner concurrently with raw MR data. Gradient measures were frequency modulated into an RF signal receivable by the scanner, yielding ak-space trajectory measure from the cumulative phase of the acquired data. Generation of the gradient measure and frequency modulation was performed by previously developed custom, ...
Source: Magnetic Resonance Materials in Physics, Biology and Medicine - July 30, 2019 Category: Materials Science Source Type: research

Transverse relaxometry with transmit field-constrained stimulated echo compensation
DiscussionThe proposed method generates reliable and reproducible quantitativeT2 maps and should be considered for future relaxometry studies. (Source: Magnetic Resonance Materials in Physics, Biology and Medicine)
Source: Magnetic Resonance Materials in Physics, Biology and Medicine - July 23, 2019 Category: Materials Science Source Type: research

Measurement of T 1 and T 2 relaxation times of the pancreas at 7  T using a multi-transmit system
ConclusionT1 and T2 relaxation times of the healthy pancreas were reported for 7  T, which can be used for image acquisition optimization. No significant correlations were found between age and T1 or T2 relaxation times of the pancreas. Considering their low standard deviation and no observable age dependence, these values may be used as a baseline to study potentially pancreatic tissue affected by disease. (Source: Magnetic Resonance Materials in Physics, Biology and Medicine)
Source: Magnetic Resonance Materials in Physics, Biology and Medicine - July 17, 2019 Category: Materials Science Source Type: research

Validation of a novel blinding method for measuring postoperative knee articular cartilage using magnetic resonance imaging
DiscussionPostoperative measures of cartilage thickness are repeatable, consistent and sensitive to change when artifact is eliminated, and a validated blinding technique is used. These results provide proof of concept for accurately measuring increases in medial knee articular cartilage after medial opening wedge HTO. (Source: Magnetic Resonance Materials in Physics, Biology and Medicine)
Source: Magnetic Resonance Materials in Physics, Biology and Medicine - July 12, 2019 Category: Materials Science Source Type: research

Evaluation of contrast agent dose and diffusion coefficient measurement on vessel size index estimation
AbstractObjectivesThe goal of this study is to examine the effect of contrast agent (CA) dose and diffusion coefficient on the estimation of vessel size index (VSI).Materials and methodsThree groups of four participants were enrolled in this study and two different experiments were performed. Different dose of CA, namely 0.1  mmol/kg and 0.05 mmol/kg were assessed in two groups of normal subjects. Diffusion coefficient effect was assessed in the third group with high-grade glioma. Imaging included gradient echo and spin-echo DSC and DTI on a 3-T MR Scanner.ResultsVSI estimation using half of standard dose of CA s...
Source: Magnetic Resonance Materials in Physics, Biology and Medicine - July 3, 2019 Category: Materials Science Source Type: research

Phase-contrast magnetic resonance imaging for analyzing hemodynamic parameters and wall shear stress of pulmonary arteries in patients with pulmonary arterial hypertension
AbstractObjectiveTo investigate flow-related parameters in pulmonary arteries of patients with pulmonary arterial hypertension (PAH).Materials and methodsEleven PAH patients and twelve control participants were recruited. PAH and controls had similar age and gender distribution. 2D phase-contrast MRI (PC-MRI) was performed in the main, right, and left pulmonary artery (MPA, RPA, and LPA). The flow velocity, wall shear stress (WSS), and oscillatory shear index (OSI) were measured.ResultsPAH patients displayed prolonged acceleration time (Tacce) and increased ratio of flow change to acceleration volume in pulmonary arteries (bothP 
Source: Magnetic Resonance Materials in Physics, Biology and Medicine - July 3, 2019 Category: Materials Science Source Type: research

Automatic correction of background phase offset in 4D-flow of great vessels and of the heart in MRI using a third-order surface model
AbstractObjectiveTo evaluate an automatic correction method for velocity offset errors in cardiac 4D-flow acquisitions.Materials and methodsVelocity offset correction was done in a plane-by-plane scheme and compared to a volumetric approach. Stationary regions were automatically detected. In vitro experiments were conducted in a phantom using two orientations and two encoding velocities (Venc). First- to third-order models were fit to the time-averaged images of the three velocity components. In vivo experiments included realistic ROIs in a volunteer superimposed to a phantom. In 15 volunteers, blood flow volume of the pro...
Source: Magnetic Resonance Materials in Physics, Biology and Medicine - June 22, 2019 Category: Materials Science Source Type: research

A high duty-cycle, multi-channel, power amplifier for high-resolution radiofrequency encoded magnetic resonance imaging
ConclusionThe constructed amplifier is the first prototype that meets the requirements of TRASE rectifying limitations of duty cycle and timing presented by commercial RF amplifiers. The amplifier makes possible future high resolution in vivo TRASE MRI. (Source: Magnetic Resonance Materials in Physics, Biology and Medicine)
Source: Magnetic Resonance Materials in Physics, Biology and Medicine - June 20, 2019 Category: Materials Science Source Type: research

Effect of combination and number of b values in IVIM analysis with post-processing methodology: simulation and clinical study
DiscussionBE model with TV penalty function is robust to combination ofb values used for IVIM analysis. Combination of 8b values provided a reasonably good accuracy in IVIM parameters. (Source: Magnetic Resonance Materials in Physics, Biology and Medicine)
Source: Magnetic Resonance Materials in Physics, Biology and Medicine - June 18, 2019 Category: Materials Science Source Type: research

Evaluation of variable flip angle, MOLLI, SASHA, and IR-SNAPSHOT pulse sequences for T 1 relaxometry and extracellular volume imaging of the pancreas and liver
ConclusionMOLLI, SASHA, and IR-SNAPSHOT provided almost perfect in vitro precision and similarT1 during in vivo scans. Similar ECV fractions of the liver and pancreas were obtained with all sequences. More refinement of pulse sequences to provide sufficient spatial coverage in one breath hold together with high precision would be desirable in abdominal imaging. (Source: Magnetic Resonance Materials in Physics, Biology and Medicine)
Source: Magnetic Resonance Materials in Physics, Biology and Medicine - June 4, 2019 Category: Materials Science Source Type: research

Assessment of MR imaging during one-lung flooding in a large animal model
This study investigates the feasibility of OLF in an MRI environment and evaluates the flooding process on MR images.MethodsOLF of the left lung was performed on five animals using a porcine model. Before, during and after OLF, standard T2w and T1w spin-echo (SE) and gradient-echo (GRE) sequences were applied at 3  T.ResultsThe procedure was successfully performed in all animals. On T1w MRI, the flooded lung appeared homogenous and isointense with muscle tissue. On T2w images, vascular structures were highly hypointense, while the bronchi were clearly demarcated with hypointense wall and hyperintense lumen. The anatom...
Source: Magnetic Resonance Materials in Physics, Biology and Medicine - June 1, 2019 Category: Materials Science Source Type: research

Development of anisotropic phantoms using wood and fiber materials for diffusion tensor imaging and diffusion kurtosis imaging
DiscussionWood and fibers have anisotropy and are promising as phantom materials. The development of anisotropic phantoms that anyone can use is useful for diffusion magnetic resonance imaging research and clinical applications. (Source: Magnetic Resonance Materials in Physics, Biology and Medicine)
Source: Magnetic Resonance Materials in Physics, Biology and Medicine - May 29, 2019 Category: Materials Science Source Type: research

Studying the cardiovascular system of a marine crustacean with magnetic resonance imaging at 9.4  T
DiscussionChoosing adequate imaging protocols in combination with a specific RF coil arrangement allows to monitor various parts of the crustacean CVS with exceptionally high spatial resolution despite the adverse effects of seawater at 9.4  T. (Source: Magnetic Resonance Materials in Physics, Biology and Medicine)
Source: Magnetic Resonance Materials in Physics, Biology and Medicine - May 23, 2019 Category: Materials Science Source Type: research

In-bore biopsies of the prostate assisted by a remote-controlled manipulator at 1.5 T
ConclusionMR-targeted, transrectal biopsy of the prostate could be reliably performed with a robotic manipulator at a field strength of 1.5 T. Balanced SSFP imaging is considered a viable option for fast procedural control. Follow-up work needs to evaluate to what extent in-bore adjustments and workflow enhancements will contribute to shorter procedure times or higher patient comfort. (Source: Magnetic Resonance Materials in Physics, Biology and Medicine)
Source: Magnetic Resonance Materials in Physics, Biology and Medicine - May 9, 2019 Category: Materials Science Source Type: research

1 H-MRS of femoral red and yellow bone marrow fat composition and water content in healthy young men and women at 3  T
AbstractObjectivesThere is a discrepancy between studies suggesting that higher bone marrow fat saturation is associated with impaired health, and studies suggesting that erythropoiesis increases red bone marrow (RBM) fat saturation in young healthy individuals. Here, we seeked to elucidate these discrepancies by using long TE magnetic resonance spectroscopy (MRS) to study both yellow bone marrow (YBM) and RBM in the femur of healthy volunteers.Materials and methodsThirty-three young healthy volunteers (17 females), age range 20 –31 years, underwent long TE1H MRS at 3.0 T of RBM and YBM fat composition in the le...
Source: Magnetic Resonance Materials in Physics, Biology and Medicine - May 2, 2019 Category: Materials Science Source Type: research

Proton MR spectroscopy of human pancreas allografts
ConclusionWe have shown that1H-MRS is a useful tool for the estimation of pancreas graft lipid concentrations. Total pancreatic fat and especially content of intracellular lipids of NAPC are valuable measures for inspection of graft quality prior to transplantation or islet of Langerhans isolation. (Source: Magnetic Resonance Materials in Physics, Biology and Medicine)
Source: Magnetic Resonance Materials in Physics, Biology and Medicine - April 1, 2019 Category: Materials Science Source Type: research

Improved signal-to-noise ratio in EPI sequences with highly asymmetric spin echo and highly asymmetric STEAM preparations (HASE-EPI and HASTEAM-EPI)
DiscussionIn contrast to commonly used SE-EPI or STEAM-EPI, the proposed sequences facilitate the acquisition of anatomical imaging and DWI data with improved SNR, especially for full EPI readouts. However, the applicability of HASE-EPI and HASTEAM-EPI should be carefully assessed: while signal gains are less pronounced when using parallel imaging and/or reduced matrix sizes, there may be pixel broadening for very long EPI-readout trains. (Source: Magnetic Resonance Materials in Physics, Biology and Medicine)
Source: Magnetic Resonance Materials in Physics, Biology and Medicine - April 1, 2019 Category: Materials Science Source Type: research

Accelerating cardiac diffusion tensor imaging combining local low-rank and 3D TV constraint
ConclusionThe proposed method provides better reconstruction quality and more accurate DTI indices in comparison with the state-of-the-art CS-based DW image reconstruction methods. (Source: Magnetic Resonance Materials in Physics, Biology and Medicine)
Source: Magnetic Resonance Materials in Physics, Biology and Medicine - March 22, 2019 Category: Materials Science Source Type: research

White and grey matter development in utero assessed using motion-corrected diffusion tensor imaging and its comparison to ex utero measures
The objective was to 1) quantify DTI measures across gestation in a cohort of fetuses without brain abnormalities using full retrospective correction for fetal head motion 2) compare results obtained in utero to those in preterm infants.Materials and methodsMotion-corrected DTI analysis was performed on data sets obtained at 1.5T from 32 fetuses scanned between 21.29 and 37.57 (median 31.86) weeks. Results were compared to 32 preterm infants scanned at 3T between 27.43 and 37.14 (median 33.07) weeks. Apparent diffusion coefficient (ADC) and fractional anisotropy (FA) were quantified by region of interest measurements and t...
Source: Magnetic Resonance Materials in Physics, Biology and Medicine - March 12, 2019 Category: Materials Science Source Type: research

Acknowledgement to reviewers 2018
(Source: Magnetic Resonance Materials in Physics, Biology and Medicine)
Source: Magnetic Resonance Materials in Physics, Biology and Medicine - March 11, 2019 Category: Materials Science Source Type: research

Chemotherapy response of pancreatic cancer by diffusion-weighted imaging (DWI) and intravoxel incoherent motion DWI (IVIM-DWI) in an orthotopic mouse model
AbstractPurposeTo investigate the value of using diffusion-weighted imaging (DWI) and intravoxel incoherent motion DWI (IVIM-DWI) to assess the chemotherapy response of pancreatic cancer in an orthotopic mouse model.Materials and methodsTwenty-four BALB/C nu/nu mice in two groups (n = 12/group) with human pancreatic adenocarcinoma xenografts were dosed intravenously with saline (group 1) and gemcitabine (group 2). DWI with 3b values (b = 50, 400 and 800 s/mm2) and IVIM-DWI with multiple b values (b = 0, 25, 50, 80, 100, 300, 500, 800 s/mm2) were performed on the day befor...
Source: Magnetic Resonance Materials in Physics, Biology and Medicine - March 1, 2019 Category: Materials Science Source Type: research

Finite difference transmission line model for the design of safe multi-section cables in MRI
DiscussionThe multi-section cable design can reduce the heating of cables in MRI taking into account phase effects. The finite difference transmission line model presented is a simple valuable tool to estimate the worst case heating of simple multi-section cables. (Source: Magnetic Resonance Materials in Physics, Biology and Medicine)
Source: Magnetic Resonance Materials in Physics, Biology and Medicine - February 19, 2019 Category: Materials Science Source Type: research

A dual 1 H/ 19 F birdcage coil for small animals at 7  T MRI
We present a simple structure of a double-tuned high-pass birdcage coil tuned to1H and19F that shows a great uniformity and sensitivity for19F. (Source: Magnetic Resonance Materials in Physics, Biology and Medicine)
Source: Magnetic Resonance Materials in Physics, Biology and Medicine - February 16, 2019 Category: Materials Science Source Type: research