Cardiac magnetic resonance tissue tracking in right ventricle: Feasibility and normal values.


PURPOSE:To investigate right ventricular (RV) strain in patients without identified cardiac pathology using cardiac magnetic resonance tissue tracking (CMR TT). METHODS:A total of 50 consecutive patients with no identified cardiac pathology were analyzed. RV longitudinal and circumferential strain was assessed by CMR TT. The age range was 4-81years with a median of 32years (interquartile range, 15 to 56years). RESULTS:Analysis time per patient was <5min. The peak longitudinal strain (Ell) was -22.11±3.51%. The peak circumferential strains (Ecc) for global, basal, mid-cavity and apical segments were as follows: -11.69±2.25%, -11.00±2.45%, -11.17±3.36%, -12.90±3.34%. There were significant gender differences in peak Ecc at the base (P=0.04) and the mid-cavity (P=0.03) with greater deformation in females than in males. On Bland-Altman analysis, peak Ell (mean bias, 0.22±1.67; 95% CI -3.05 to 3.49) and mid-cavity Ecc (mean bias, 0.036±1.75; 95% CI, -3.39 to 3.47) had the best intra-observer agreement and inter-observer agreement, respectively. CONCLUSIONS:RV longitudinal and circumferential strains can be quickly assessed with good intra-observer and inter-observer variability using TT.


Magn Reson Imaging


Truong VT,Safdar KS,Kalra DK,Gao X,Ambach S,Taylor MD,Moore R,Taylor RJ,Germann J,Toro-Salazar O,Jefferies JL,Bartone C,Raman SV,Ngo T,Mazur W




Has Abstract


2017-05-01 00:00:00












  • Pretibial cyst formation after anterior cruciate ligament reconstruction using auto hamstring grafts: two case reports in a prospective study of 89 cases.

    abstract::Eighty-nine cases after anterior cruciate ligaments (ACL) reconstruction were followed prospectively with magnetic resonance imaging (MRI). The patients were examined using axial and sagittal MRI at least twice during the postoperative evaluation of reconstructed ACL. Two cases of pretibial cyst formation were observe...

    journal_title:Magnetic resonance imaging

    pub_type: 杂志文章


    authors: Deie M,Sumen Y,Ochi M,Murakami Y,Fujimoto E,Ikuta Y

    更新日期:2000-10-01 00:00:00

  • Simultaneous optimization of power and duration of radio-frequency pulse in PARACEST MRI.

    abstract::Chemical exchange saturation transfer (CEST) MRI is increasingly used to probe mobile proteins and microenvironment properties, and shows great promise for tumor and stroke diagnosis. The CEST effect is complex and depends not only on the CEST agent concentration, exchange rates, the characteristic of the magnetizatio...

    journal_title:Magnetic resonance imaging

    pub_type: 杂志文章


    authors: Rezaeian MR,Hossein-Zadeh GA,Soltanian-Zadeh H

    更新日期:2016-07-01 00:00:00

  • Reproducibility of MRI-derived measurements of right ventricular volumes and myocardial mass.

    abstract::Magnetic resonance (MR) imaging has been shown to provide accurate measurements of right ventricular (RV) volumes and myocardial mass. The purpose of this study was to evaluate the reproducibility of MR imaging, which in clinical practice may be as important as its absolute accuracy. The reproducibility of MR imaging ...

    journal_title:Magnetic resonance imaging

    pub_type: 杂志文章


    authors: Pattynama PM,Lamb HJ,Van der Velde EA,Van der Geest RJ,Van der Wall EE,De Roos A

    更新日期:1995-01-01 00:00:00

  • Mri measurements of T1, T2 and D for gels undergoing volume phase transition.

    abstract::Gels consist of crosslinked polymer network swollen in solvent. The network of flexible long-chain molecules traps the liquid medium they are immersed in. Some gels undergo abrupt volume change, a phase transition process, by swelling-shrinking in response to external stimuli changes in solvent composition, temperatur...

    journal_title:Magnetic resonance imaging

    pub_type: 杂志文章


    authors: Yung KT

    更新日期:2003-02-01 00:00:00

  • Magnetic resonance spectroscopy of the brain in neurologically asymptomatic HIV-infected patients.

    abstract::The CNS involvement is frequently found in human immunodeficiency virus (HIV) infection. The purpose of our study was to determine whether proton magnetic resonance spectroscopy (MRS) could detect early brain involvement in neurologically asymptomatic HIV-infected patients with normal MR imagings and to find the corre...

    journal_title:Magnetic resonance imaging

    pub_type: 临床试验,杂志文章


    authors: Suwanwelaa N,Phanuphak P,Phanthumchinda K,Suwanwela NC,Tantivatana J,Ruxrungtham K,Suttipan J,Wangsuphachart S,Hanvanich M

    更新日期:2000-09-01 00:00:00

  • Proton density water fraction as a biomarker of bone marrow cellularity: validation in ex vivo spine specimens.

    abstract::The purpose of this study was to evaluate a magnetic resonance imaging (MRI) technique for quantifying the proton density water fraction (PDWF) as a biomarker of bone marrow cellularity. Thirty-six human bone marrow specimens from 18 donors were excised and subjected to different measurements of tissue composition: PD...

    journal_title:Magnetic resonance imaging

    pub_type: 杂志文章


    authors: MacEwan IJ,Glembotski NE,D'Lima D,Bae W,Masuda K,Rashidi HH,Mell LK,Bydder M

    更新日期:2014-11-01 00:00:00

  • Correlation of apparent diffusion coefficient and intravoxel incoherent motion imaging parameters with Ki-67 expression in extrahepatic cholangiocarcinoma.

    abstract:PURPOSE:To investigate the correlation of magnetic resonance imaging (MRI), apparent diffusion coefficient (ADC) and intravoxel incoherent motion imaging parameters with Ki-67 expression in cholangiocarcinoma. METHODS:A total of 42 extrahepatic cholangiocarcinoma (EHCC) cases confirmed by surgical pathology were analy...

    journal_title:Magnetic resonance imaging

    pub_type: 杂志文章


    authors: Cui X,Chen H,Cai S,Tang Q,Fang X

    更新日期:2019-11-01 00:00:00

  • Reproducibility of simultaneous imaging of intracranial and extracranial arterial vessel walls using an improved T1-weighted DANTE-SPACE sequence on a 3 T MR system.

    abstract:PURPOSE:To systematically investigate the scan-rescan, intra-observer, and inter-observer reproducibility of an improved DANTE-SPACE sequence for the simultaneous assessment of intra- and extracranial arterial vessel wall morphology. MATERIALS AND METHODS:Thirty-five healthy volunteers and 10 patients with atheroscler...

    journal_title:Magnetic resonance imaging

    pub_type: 杂志文章


    authors: Wan L,Zhang N,Zhang L,Long X,Jia S,Li Y,Liang D,Zheng H,Liu X

    更新日期:2019-10-01 00:00:00

  • Effect of vasodilator hydralazine on tumor microvascular random flow and blood volume as measured by intravoxel incoherent motion (IVIM) weighted MRI in conjunction with Gd-DTPA-Albumin enhanced MRI.

    abstract::We studied the effect of hydralazine on tumor blood volume fraction and microvascular random flow velocity magnitude by IVIM weighted MRI in conjunction with dynamic Gd-DTPA-Albumin enhanced MRI. Blood volume fraction maps were obtained from the dynamic Gd-DTPA-Albumin enhanced MRI measurements. The average blood volu...

    journal_title:Magnetic resonance imaging

    pub_type: 杂志文章


    authors: Wang Z,Su MY,Najafi A,Nalcioglu O

    更新日期:2001-10-01 00:00:00

  • A practical approach to in vivo high-resolution diffusion tensor imaging of rhesus monkeys on a 3-T human scanner.

    abstract::The nonhuman primate brain study provides important supplemental means for human brain exploration since the two species share close anatomical and functional similarities. MR diffusion tensor imaging (DTI) in human brain has revealed exquisite details of brain structures especially in the brain white matter. However,...

    journal_title:Magnetic resonance imaging

    pub_type: 杂志文章


    authors: Liu X,Zhu T,Gu T,Zhong J

    更新日期:2009-04-01 00:00:00

  • Intracranial vascular feature changes in time of flight MR angiography in patients undergoing carotid revascularization surgery.

    abstract:PURPOSE:To characterize the intracranial vascular features extracted from time of flight (TOF) images and their changes from baseline to follow-up in patients undergoing carotid revascularization, using arterial spin labeling (ASL) cerebral blood flow (CBF) measurement as a reference. METHODS:In this retrospective stu...

    journal_title:Magnetic resonance imaging

    pub_type: 杂志文章


    authors: Chen Z,Chen L,Shirakawa M,Liu W,Ortega D,Chen J,Balu N,Trouard T,Hatsukami TS,Zhou W,Yuan C

    更新日期:2021-01-01 00:00:00

  • In situ magnetic resonance measurement of conversion, hydrodynamics and mass transfer during single- and two-phase flow in fixed-bed reactors.

    abstract::In recent years there has been increasing interest in applying magnetic resonance (MR) techniques in areas of engineering and chemical technology. The science that underpins many of these applications is the physics and chemistry of transport and reaction processes in porous materials. Key to the exploitation of MR me...

    journal_title:Magnetic resonance imaging

    pub_type: 杂志文章


    authors: Gladden LF,Alexander P,Britton MM,Mantle MD,Sederman AJ,Yuen EH

    更新日期:2003-04-01 00:00:00

  • Diffusional kurtosis imaging of cingulate fibers in Parkinson disease: comparison with conventional diffusion tensor imaging.

    abstract:OBJECTIVE:The pathological changes in Parkinson disease begin in the brainstem; reach the limbic system and ultimately spread to the cerebral cortex. In Parkinson disease (PD) patients, we evaluated the alteration of cingulate fibers, which comprise part of the limbic system, by using diffusional kurtosis imaging (DKI)...

    journal_title:Magnetic resonance imaging

    pub_type: 杂志文章


    authors: Kamagata K,Tomiyama H,Motoi Y,Kano M,Abe O,Ito K,Shimoji K,Suzuki M,Hori M,Nakanishi A,Kuwatsuru R,Sasai K,Aoki S,Hattori N

    更新日期:2013-11-01 00:00:00

  • Off-resonance binomial preparatory pulse technique for high sensitivity MRI of H2O17.

    abstract::H2O17 is a freely diffusible tracer and naturally occurring isotope of O16 detectable by MRI and has been shown to be useful for assessing cerebral perfusion in animal studies using direct and indirect MR detection techniques. However, earlier MR techniques are either not sensitive to changes in small concentrations o...

    journal_title:Magnetic resonance imaging

    pub_type: 杂志文章


    authors: Sood R

    更新日期:2004-02-01 00:00:00

  • Parametric multiecho proton spectroscopic imaging: application to the rat brain in vivo.

    abstract::A parametric multiecho variant of proton spectroscopic imaging (SI) is presented using a multiecho SI sequence with uniform phase-encoding of all echoes within each echo train. The acquisition of SI data sets at different echo times (TE) increases the amount of information obtained within the same total measuring time...

    journal_title:Magnetic resonance imaging

    pub_type: 杂志文章


    authors: Dreher W,Leibfritz D

    更新日期:1995-01-01 00:00:00

  • Analysis of time reduction methods for magnetic resonance elastography of the brain.

    abstract::Magnetic resonance elastography (MRE) uses a phase-contrast MRI technique to image shear wave propagation in tissue followed by the mathematical inversion of the equations of motion governing tissue mechanics to noninvasively image tissue stiffness. This work investigates the impact of various MR sampling strategies d...

    journal_title:Magnetic resonance imaging

    pub_type: 杂志文章


    authors: Murphy MC,Glaser KJ,Manduca A,Felmlee JP,Huston J 3rd,Ehman RL

    更新日期:2010-12-01 00:00:00

  • Free-running simultaneous myocardial T1/T2 mapping and cine imaging with 3D whole-heart coverage and isotropic spatial resolution.

    abstract:PURPOSE:To develop a free-running framework for 3D isotropic simultaneous myocardial T1/T2 mapping and cine imaging. METHODS:Continuous data acquisition with 3D golden angle radial trajectory is used in conjunction with T2 preparation of varying echo times and inversion recovery (IR) pulses to enable simultaneous myoc...

    journal_title:Magnetic resonance imaging

    pub_type: 杂志文章


    authors: Qi H,Bustin A,Cruz G,Jaubert O,Chen H,Botnar RM,Prieto C

    更新日期:2019-11-01 00:00:00

  • Applications of controlled-flow laser-polarized xenon gas to porous and granular media study.

    abstract::We report initial NMR studies of continuous flow laser-polarized xenon gas, both in unrestricted tubing, and in a model porous media. The study uses Pulsed Gradient Spin Echo-based techniques in the gas-phase, with the aim of obtaining more sophisticated information than just translational self-diffusion coefficients....

    journal_title:Magnetic resonance imaging

    pub_type: 杂志文章


    authors: Mair RW,Wang R,Rosen MS,Candela D,Cory DG,Walsworth RL

    更新日期:2003-04-01 00:00:00

  • Magnetic resonance T2* measurements of the normal human lung in vivo with ultra-short echo times.

    abstract::The objective of this study was to measure T2* values of the normal human lung in vivo during breathhold using a rapid gradient-echo sequence with ultra-short echo times (TE). A sagittal slice of the right lung was imaged in six volunteers with various TE ranging from 0.5 ms to 5 ms using a clinical 1.5 Tesla MR scann...

    journal_title:Magnetic resonance imaging

    pub_type: 杂志文章


    authors: Stock KW,Chen Q,Hatabu H,Edelman RR

    更新日期:1999-09-01 00:00:00

  • T2* measurements in human brain at 1.5, 3 and 7 T.

    abstract::Measurements have been carried out in six subjects at magnetic fields of 1.5, 3 and 7 T, with the aim of characterizing the variation of T2* with field strength in human brain. Accurate measurement of T2* in the presence of macroscopic magnetic field inhomogeneity is problematic due to signal decay resulting from thro...

    journal_title:Magnetic resonance imaging

    pub_type: 杂志文章


    authors: Peters AM,Brookes MJ,Hoogenraad FG,Gowland PA,Francis ST,Morris PG,Bowtell R

    更新日期:2007-07-01 00:00:00

  • Adaptive segmentation of magnetic resonance images with intensity inhomogeneity using level set method.

    abstract::It is a big challenge to segment magnetic resonance (MR) images with intensity inhomogeneity. The widely used segmentation algorithms are region based, which mostly rely on the intensity homogeneity, and could bring inaccurate results. In this paper, we propose a novel region-based active contour model in a variationa...

    journal_title:Magnetic resonance imaging

    pub_type: 杂志文章


    authors: Liu L,Zhang Q,Wu M,Li W,Shang F

    更新日期:2013-05-01 00:00:00

  • MAgnitude and PHase Thresholding (MAPHT) of noisy complex-valued magnetic resonance images.

    abstract::It is often desirable to separate voxels that contain signal from tissue along with measurement noise from those that contain purely measurement noise. Generally, this separation called thresholding utilizes only the magnitude portion of the images. Recently, methods have been developed that utilize both the magnitude...

    journal_title:Magnetic resonance imaging

    pub_type: 杂志文章


    authors: Rowe DB,Haacke EM

    更新日期:2009-11-01 00:00:00

  • Diffusion of liquids into semicrystalline polyethylene.

    abstract::Pulsed field gradient (PFG) nuclear magnetic resonance (NMR) and microimaging experiments have been performed to study the diffusion of liquid alkanes into a variety of semicrystalline polyethylene (PE) samples. The results highlight the importance of the crystalline phase in controlling the diffusion process in terms...

    journal_title:Magnetic resonance imaging

    pub_type: 杂志文章


    authors: Harding SG,Gladden LF

    更新日期:1998-06-01 00:00:00

  • Correlations and dissociations between BOLD signal and P300 amplitude in an auditory oddball task: a parametric approach to combining fMRI and ERP.

    abstract::A parametric method is proposed to examine the relationship between neuronal activity, measured with event related potentials (ERPs), and the hemodynamic response, observed with functional magnetic resonance imaging (fMRI), during an auditory oddball paradigm. After verifying that the amplitude of the evoked response ...

    journal_title:Magnetic resonance imaging

    pub_type: 杂志文章


    authors: Horovitz SG,Skudlarski P,Gore JC

    更新日期:2002-05-01 00:00:00

  • Breath-hold T2-weighted sequences of the liver: a comparison of four techniques at 1.0 and 1.5 T.

    abstract::T2-weighted images are considered the most sensitive for lesion detection at high field; however, long imaging time is problematic. Accordingly, the authors compared four breath-hold T2 or T2* weighted sequences comprising T2*-weighted FLASH, T2*-weighted PSIF, T2-weighted rapid spin echo (RASE), and T2-weighted Turbo...

    journal_title:Magnetic resonance imaging

    pub_type: 杂志文章


    authors: Simm FC,Semelka RC,Recht M,Deimling M,Lenz G,Laub GA

    更新日期:1992-01-01 00:00:00

  • Quantitative multi-modal functional MRI with blood oxygenation level dependent exponential decays adjusted for flow attenuated inversion recovery (BOLDED AFFAIR).

    abstract::A magnetic resonance imaging (MRI) method is described that allows interleaved measurements of transverse (R(2)(*) and R(2)) and longitudinal (R(1)) relaxation rates of tissue water in conjunction with spin labeling. The image-contrasts are intrinsically blood oxygenation level dependent (BOLD) and cerebral blood flow...

    journal_title:Magnetic resonance imaging

    pub_type: 杂志文章


    authors: Hyder F,Renken R,Kennan RP,Rothman DL

    更新日期:2000-04-01 00:00:00

  • MR imaging of pterygoid muscle inflammation.

    abstract::A case report of trismus after a dental procedure is evaluated by MR imaging. The medial and lateral pterygoid muscles showed inflammatory changes. Etiologies of trismus are reviewed. ...

    journal_title:Magnetic resonance imaging

    pub_type: 杂志文章


    authors: Ciacchella AP,Higgins WL

    更新日期:1990-01-01 00:00:00

  • Cardiac magnetic resonance imaging in arrhythmogenic right ventricular cardiomyopathy: correlation to the QRS dispersion.

    abstract::The aim of the study was to evaluate the relationship between the presence of right ventricular abnormalities detected by cardiac magnetic resonance (CMR) and QRS dispersion, the strongest independent predictor of sudden death in ARVC. A consecutive series of 40 patients from a single institution were recruited with a...

    journal_title:Magnetic resonance imaging

    pub_type: 杂志文章


    authors: Ma N,Cheng H,Lu M,Jiang S,Yin G,Zhao S

    更新日期:2012-12-01 00:00:00

  • Voxel-Wise Logistic Regression and Leave-One-Source-Out Cross Validation for white matter hyperintensity segmentation.

    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

    pub_type: 杂志文章


    authors: Knight J,Taylor GW,Khademi A

    更新日期:2018-12-01 00:00:00

  • A rapid method for the measurement and estimation of CO2 diffusivity in liquid hydrocarbon-saturated porous media using MRI.

    abstract::In this study, magnetic resonance imaging (MRI) was used to dynamically visualize the diffusion process of CO2 in porous media saturated with liquid hydrocarbon. Based on the assumption of semi-infinite media, effective CO2 diffusivity was obtained directly by the nonlinear fitting of one MR profile during the diffusi...

    journal_title:Magnetic resonance imaging

    pub_type: 杂志文章


    authors: Zhao Y,Chen J,Yang M,Liu Y,Song Y

    更新日期:2016-05-01 00:00:00