Effect of physiological heart rate variability on quantitative T2 measurement with ECG-gated Fast Spin Echo (FSE) sequence and its retrospective correction.


OBJECT:Quantitative T2 measurement is applied in cardiac Magnetic Resonance Imaging (MRI) for the diagnosis and follow-up of myocardial pathologies. Standard Electrocardiogram (ECG)-gated fast spin echo pulse sequences can be used clinically for T2 assessment, with multiple breath-holds. However, heart rate is subject to physiological variability, which causes repetition time variations and affects the recovery of longitudinal magnetization between TR periods. MATERIALS AND METHODS:The bias caused by heart rate variability on quantitative T2 measurements is evaluated for fast spin echo pulse sequence. Its retrospective correction based on an effective TR is proposed. Heart rate variations during breath-holds are provided by the ECG recordings from healthy volunteers. T2 measurements were performed on a phantom with known T2 values, by synchronizing the sequence with the recorded ECG. Cardiac T2 measurements were performed twice on six volunteers. The impact of T1 on T2 is also studied. RESULTS:Maximum error in T2 is 26% for phantoms and 18% for myocardial measurement. It is reduced by the proposed compensation method to 20% for phantoms and 10% for in vivo measurements. Only approximate knowledge of T1 is needed for T2 correction. CONCLUSION:Heart rate variability may cause a bias in T2 measurement with ECG-gated FSE. It needs to be taken into account to avoid a misleading diagnosis from the measurements.


Magn Reson Imaging


de Roquefeuil M,Vuissoz PA,Escanyé JM,Felblinger J




Has Abstract


2013-11-01 00:00:00














  • Active intrahepatic gadolinium extravasation following TIPS.

    abstract::A 31-year-old male patient had a transjugular intrahepatic portal systemic shunt (TIPS) placed for acute Budd-Chiari syndrome secondary to paroxysmal nocturnal hemoglobinuria (PNH). Post-procedure, he was anticoagulated for his underlying paroxysmal nocturnal hemoglobinuria. After 11 days, he complained of upper abdom...

    journal_title:Magnetic resonance imaging

    pub_type: 杂志文章


    authors: Hasegawa S,Eisenberg LB,Semelka RC

    更新日期:1998-09-01 00:00:00

  • In vivo proton magnetic resonance spectroscopy of alcohol in rhesus monkey brain.

    abstract::Brain alcohol was measured in rhesus monkeys (Macaca mulatta) by proton magnetic resonance spectroscopy (MRS) following acute nasogastric alcohol administration (0.8 g/kg). Monkeys were anesthetized with ketamine and xylazine. A 1.5 T whole body imager and a 3-inch surface coil were used to acquire TE 30 and 270 ms sp...

    journal_title:Magnetic resonance imaging

    pub_type: 杂志文章


    authors: Kaufman MJ,Chiu TM,Mendelson JH,Woods BT,Mello NK,Lukas SE,Fivel PA,Wighton LG

    更新日期:1994-01-01 00:00:00

  • MR Imaging of total hip arthroplasty: comparison among sequences to study the sciatic nerve at 1.5 T.

    abstract:PURPOSE:This study was done to test a series of MR sequences for evaluating the sciatic nerve after total hip arthroplasty (THA). MATERIAL AND METHODS:The study protocol was approved by the institutional review board. Informed consent was obtained from all patients. Twenty-five patients (11 men and 14 women mean age: ...

    journal_title:Magnetic resonance imaging

    pub_type: 杂志文章


    authors: Tagliafico A,Podestà A,Assini A,Boccacini L,Serafini G,Calabrese M,Martinoli C

    更新日期:2010-11-01 00:00:00

  • Single-sided mobile NMR with a Halbach magnet.

    abstract::A single-sided mobile NMR apparatus with a small Halbach magnet was constructed for the first time. It is lightweight, compact and exhibits good sensitivity. The weight of the device is only 2 kg, and the NMR signal of the pencil eraser block can be detected in one shot using the device. This study describes the chara...

    journal_title:Magnetic resonance imaging

    pub_type: 杂志文章


    authors: Chang WH,Chen JH,Hwang LP

    更新日期:2006-10-01 00:00:00

  • Chemical exchange magnetic resonance imaging (CHEMI).

    abstract::Systems investigated with NMR spectroscopy are sometimes heterogeneous with respect to chemical composition, rates of chemical exchange, and other properties influencing magnetic resonance parameters. A method was developed to spatially encode reaction kinetic information and produce NMR images sensitive to chemical e...

    journal_title:Magnetic resonance imaging

    pub_type: 杂志文章


    authors: McFarland EW,Neuringer LJ,Kushmerick MJ

    更新日期:1988-09-01 00:00:00

  • Usefulness of cervical magnetic resonance imaging for detecting type A acute aortic dissection with acute stroke symptoms.

    abstract::Type A acute aortic dissection (TAAAD) sometimes presents with acute stroke-like symptoms. When intravenous tissue plasminogen activator (IV-tPA) therapy is considered for acute ischemic stroke, TAAAD must be excluded. Painless TAAAD presenting with acute stroke may be easily missed. Two cases of painless TAAAD presen...

    journal_title:Magnetic resonance imaging

    pub_type: 杂志文章


    authors: Matsumoto H,Yoshida Y,Hirata Y

    更新日期:2016-09-01 00:00:00

  • Considerations in applying 3D PRESS H-1 brain MRSI with an eight-channel phased-array coil at 3 T.

    abstract::The purpose of this study was to assess the benefits of a 3 T scanner and an eight-channel phased-array head coil for acquiring three-dimensional PRESS (Point REsolved Spectral Selection) proton (H-1) magnetic resonance spectroscopic imaging (MRSI) data from the brains of volunteers and patients with brain tumors rela...

    journal_title:Magnetic resonance imaging

    pub_type: 杂志文章


    authors: Li Y,Osorio JA,Ozturk-Isik E,Chen AP,Xu D,Crane JC,Cha S,Chang S,Berger MS,Vigneron DB,Nelson SJ

    更新日期:2006-12-01 00:00:00

  • Spectral pattern of total creatine and trimethyl ammonium in multiple sclerosis.

    abstract::Fatigue and impairment mobility are frequent problems in multiple sclerosis (MS). Despite its enormous potential, in vivo (1)H MRS of skeletal muscles for MS patients is a largely unexplored field. One fundamental question remains unanswered: whether MS can cause observable proton metabolite changes. High quality two-...

    journal_title:Magnetic resonance imaging

    pub_type: 杂志文章


    authors: Hu J,Xu Y,Jiang Q,Sehgal V,Shen Y,Xuan Y,Xia Y

    更新日期:2004-04-01 00:00:00

  • A new method for diffusion weighted imaging.

    abstract::A new method for generating diffusion contrast in magnetic resonance imaging is presented. This technique is robust enough to allow implementation on conventional imaging systems without hardware modifications. Results from phantom measurements are reported. Qualitative contrast changes in magnetic resonance images de...

    journal_title:Magnetic resonance imaging

    pub_type: 杂志文章


    authors: Norwood TJ,Williams SC

    更新日期:1993-01-01 00:00:00

  • The Langerhans' cell histiocytosis (eosinophilic granuloma) of the cervical spine: a rare diagnosis of cervical pain.

    abstract::We present the case of a 44-year-old man who complained of cervical pain. He was treated with physiotherapy and analgetics. Because of persistent pain, computed tomography (CT) scan and MRI were performed. They revealed an osteolytic destruction of the fourth cervical vertebra. The patient was treated surgically for r...

    journal_title:Magnetic resonance imaging

    pub_type: 杂志文章,评审


    authors: Simanski C,Bouillon B,Brockmann M,Tiling T

    更新日期:2004-05-01 00:00:00

  • Echo-shifted multislice EPI for high-speed fMRI.

    abstract::The advantages of event-related functional Magnetic Resonance Imaging (fMRI) and the increasing use of fMRI in cognitive experiments are both driving the development of techniques that allow images sensitive to the blood oxygen level-dependent effect to be acquired at ever-higher temporal resolution. Here, we present ...

    journal_title:Magnetic resonance imaging

    pub_type: 杂志文章


    authors: Gibson A,Peters AM,Bowtell R

    更新日期:2006-05-01 00:00:00

  • Biodistribution of GdCl3 and Gd-DTPA and their influence on proton magnetic relaxation in rat tissues.

    abstract::The biodistribution and relative molar effectiveness of the ionic (GdCl3) and chelated (Gd-DTPA) forms of gadolinium (Gd) to enhance proton relaxation rates in rat kidney, liver and spleen were evaluated. Rats were given intravenous injections of either GdCl3 (100 mumol/kg) or Gd-DTPA (178 mumol/kg). Gd-DTPA was prima...

    journal_title:Magnetic resonance imaging

    pub_type: 杂志文章


    authors: Barnhart JL,Kuhnert N,Bakan DA,Berk RN

    更新日期:1987-01-01 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

  • Adaptive total linear least square method for quantification of mean transit time in brain perfusion MRI.

    abstract::Absolute quantification of cerebral blood flow (CBF), cerebral blood volume (CBV), and mean transit time (MTT) are of great relevance for clinical applications. One of the widely used methods for quantification of these parameters is gamma-variate fitting. Traditional nonlinear regression methods for gamma-variate fit...

    journal_title:Magnetic resonance imaging

    pub_type: 杂志文章


    authors: Li X,Tian J,Li E,Wang X,Dai J,Ai L

    更新日期:2003-06-01 00:00:00

  • Balanced multi-image demons for non-rigid registration of magnetic resonance images.

    abstract::A new approach is introduced for non-rigid registration of a pair of magnetic resonance images (MRI). It is a generalization of the demons algorithm with low computational cost, based on local information augmentation (by integrating multiple images) and balanced implementation. Specifically, a single deformation that...

    journal_title:Magnetic resonance imaging

    pub_type: 杂志文章


    authors: Mesin L

    更新日期:2020-12-01 00:00:00

  • A new RF transmit coil for foot and ankle imaging at 7T MRI.

    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

    pub_type: 杂志文章


    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

  • Non-enhanced magnetic resonance imaging of the small bowel at 7 Tesla in comparison to 1.5 Tesla: First steps towards clinical application.

    abstract:OBJECTIVE:To perform non-enhanced (NE) magnetic resonance imaging (MRI) of the small bowel at 7 Tesla (7T) and to compare it with 1.5 Tesla (1.5T). MATERIAL AND METHODS:Twelve healthy subjects were prospectively examined using a 1.5T and 7T MRI system. Coronal and axial true fast imaging with steady-state precession (...

    journal_title:Magnetic resonance imaging

    pub_type: 杂志文章


    authors: Hahnemann ML,Kraff O,Maderwald S,Johst S,Orzada S,Umutlu L,Ladd ME,Quick HH,Lauenstein TC

    更新日期:2016-06-01 00:00:00

  • Trajectory correction for free-breathing radial cine MRI.

    abstract::Radial acquisitions can suffer from trajectory errors leading to reduced image quality. Here we present a new method of trajectory correction that uses all spokes of a radial acquisition and compare it to an existing method that uses a two-spoke pre-scan calibration. For both methods, estimates of the necessary shifts...

    journal_title:Magnetic resonance imaging

    pub_type: 杂志文章


    authors: Buonincontri G,Methner C,Krieg T,Carpenter TA,Sawiak SJ

    更新日期:2014-09-01 00:00:00

  • Rapid acquisition strategy for functional T1ρ mapping of the brain.

    abstract::Functional T1ρ mapping has been proposed as a method to assess pH and metabolism dynamics in the brain with high spatial and temporal resolution. The purpose of this work is to describe and evaluate a variant of the spin-locked echo-planar imaging sequence for functional T1ρ mapping at 3T. The proposed sequence rapidl...

    journal_title:Magnetic resonance imaging

    pub_type: 杂志文章


    authors: Johnson CP,Heo HY,Thedens DR,Wemmie JA,Magnotta VA

    更新日期:2014-11-01 00:00:00

  • Investigating mobility of crude oil adsorbates on mineral surfaces by NMR.

    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

    pub_type: 杂志文章


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

    更新日期:2019-02-01 00:00:00

  • Relationship between neural and hemodynamic signals during spontaneous activity studied with temporal kernel CCA.

    abstract::Functional magnetic resonance imaging (fMRI) based on the so-called blood oxygen level-dependent (BOLD) contrast is a powerful tool for studying brain function not only locally but also on the large scale. Most studies assume a simple relationship between neural and BOLD activity, in spite of the fact that it is impor...

    journal_title:Magnetic resonance imaging

    pub_type: 杂志文章


    authors: Murayama Y,Biessmann F,Meinecke FC,Müller KR,Augath M,Oeltermann A,Logothetis NK

    更新日期:2010-10-01 00:00:00

  • NMR study of the diffusion processes in gels.

    abstract::Stimulated spin-echo and Carr-Purcell pulse sequences, with pulsed magnetic field gradients, have been used to study the self-diffusion processes of the water in swollen and in supercoiled polyacrylamide gels and in polysaccharides agarose gels, for different polymer concentrations. Restricted diffusion effects are ev...

    journal_title:Magnetic resonance imaging

    pub_type: 杂志文章


    authors: Pavesi L,Balzarini M

    更新日期:1996-01-01 00:00:00

  • Reducing motion artifacts in two-dimensional Fourier transform imaging.

    abstract::The effects of motion in two-dimensional Fourier transform imaging (2DFT) are considered. Specific calculations describing the case of periodic motion are presented. The results predict the commonly seen artifact of image replication, sometimes referred to as ghosting. Expressions for both position and amplitude of th...

    journal_title:Magnetic resonance imaging

    pub_type: 杂志文章


    authors: Haacke EM,Patrick JL

    更新日期:1986-01-01 00:00:00

  • Removal of extracerebral tissues in dual-echo magnetic resonance images via linear scale-space features.

    abstract::The location and masking of the brain and surrounding cerebrospinal fluid (CSF) in two-dimensional (2D) dual-echo fast spin-echo (FSE) magnetic resonance (MR) images of the head is achieved by an automated procedure with a voxel-based computational algorithm. Linear scale-space features are derived from the short-echo...

    journal_title:Magnetic resonance imaging

    pub_type: 杂志文章


    authors: Suckling J,Brammer MJ,Lingford-Hughes A,Bullmore ET

    更新日期:1999-02-01 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

  • A spectroscopic NMR investigation of the calcium silicate hydrates present in cement and concrete.

    abstract::NMR spectroscopy is applied to study microstructure of calcium silicate hydrates present in cement and concrete. It is shown that 29Si NMR gives information on the siliceous skeleton of the hydrates. 1H NMR, using CRAMPS techniques, allows to discriminate between protons linked to silicon atoms or to calcium atoms. A ...

    journal_title:Magnetic resonance imaging

    pub_type: 杂志文章


    authors: Zanni H,Rassem-Bertolo R,Masse S,Fernandez L,Nieto P,Bresson B

    更新日期:1996-01-01 00:00:00

  • Noise estimation for the velocity in MRI phase-contrast.

    abstract::The purpose of this study is to estimate the precision or statistical variability of the velocity measurements computed from MRI phase-contrast. From the analytical probability density function (PDF) of the phase in the signal we obtain the PDF of the velocity by means of an auto-convolution. This PDF allows the estim...

    journal_title:Magnetic resonance imaging

    pub_type: 杂志文章


    authors: Irarrazaval P,Dehghan Firoozabadi A,Uribe S,Tejos C,Sing-Long C

    更新日期:2019-11-01 00:00:00

  • Magnetic resonance imaging at frequencies below 1 kHz.

    abstract::Within the magnetic resonance imaging (MRI) community the trend is going to higher and higher magnetic fields, ranging from 1.5 T to 7 T, corresponding to Larmor frequencies of 63.8-298 MHz. Since for high-field MRI the magnetization increases with the applied magnetic field, the signal-to-noise-ratio increases as wel...

    journal_title:Magnetic resonance imaging

    pub_type: 杂志文章


    authors: Hilschenz I,Körber R,Scheer HJ,Fedele T,Albrecht HH,Mario Cassará A,Hartwig S,Trahms L,Haase J,Burghoff M

    更新日期:2013-02-01 00:00:00

  • Measurements of RF heating during 3.0-T MRI of a pig implanted with deep brain stimulator.

    abstract:PURPOSE:To present preliminary, in vivo temperature measurements during MRI of a pig implanted with a deep brain stimulation (DBS) system. MATERIALS AND METHODS:DBS system (Medtronic Inc., Minneapolis, MN) was implanted in the brain of an anesthetized pig. 3.0-T MRI was performed with a T/R head coil using the low-SAR...

    journal_title:Magnetic resonance imaging

    pub_type: 杂志文章


    authors: Gorny KR,Presti MF,Goerss SJ,Hwang SC,Jang DP,Kim I,Min HK,Shu Y,Favazza CP,Lee KH,Bernstein MA

    更新日期:2013-06-01 00:00:00

  • A broad line NMR and MRI study of water and water transport in Portland cement pastes.

    abstract::The results of a magnetic resonance spin-spin relaxation analysis and broad-line magnetic resonance imaging (MRI) (gradient-echo and stray-field imaging) study of water and water transport in Portland cement pastes are presented. The effect of varying the cure conditions and the water to cement (w/c) ratio of the samp...

    journal_title:Magnetic resonance imaging

    pub_type: 杂志文章


    authors: Bohris AJ,Goerke U,McDonald PJ,Mulheron M,Newling B,Le Page B

    更新日期:1998-06-01 00:00:00