当前位置： SCI文献检索 > MAGNETIC RESONANCE IMAGING期刊下所有文献 > The precision of DCE-MRI using the tissue homogeneity model with continuous formulation of the perfusion parameters.

The precision of DCE-MRI using the tissue homogeneity model with continuous formulation of the perfusion parameters.

Abstract：

:The present trend in dynamic contrast-enhanced MRI is to increase the number of estimated perfusion parameters using complex pharmacokinetic models. However, less attention is given to the precision analysis of the parameter estimates. In this paper, the distributed capillary adiabatic tissue homogeneity pharmacokinetic model is extended by the bolus arrival time formulated as a free continuous parameter. With the continuous formulation of all perfusion parameters, it is possible to use standard gradient-based optimization algorithms in the approximation of the tissue concentration time sequences. This new six-parameter model is investigated by comparing Monte-Carlo simulations with theoretically derived covariance matrices. The covariance-matrix approach is extended from the usual analysis of the primary perfusion parameters of the pharmacokinetic model to the analysis of the perfusion parameters derived from the primary ones. The results indicate that the precision of the estimated perfusion parameters can be described by the covariance matrix for signal-to-noise ratio higher than~20dB. The application of the new analysis model on a real DCE-MRI data set is also presented.

journal_name

Magn Reson Imaging

journal_title

Magnetic resonance imaging

authors

Bartoš M,Jiřík R,Kratochvíla J,Standara M,Starčuk Z Jr,Taxt T

doi

10.1016/j.mri.2014.02.003

subject

Has Abstract

pub_date

2014-06-01 00:00:00

pages

505-13

issue

5

eissn

0730-725X

issn

1873-5894

pii

S0730-725X(14)00046-0

journal_volume

32

pub_type

杂志文章

相关文献

MAGNETIC RESONANCE IMAGING文献大全
  • Visualisation of changes in regional cerebral blood flow (rCBF) produced by ketamine using long TE gradient-echo sequences: preliminary results.

    abstract：:Autoradiographic studies have shown that low dose ketamine produces increases in regional glucose utilisation and blood flow in the hippocampus, cerebral cortex, and olfactory lobe in the rat brain, probably due to antagonism at the NMDA receptor. Functional MRI using deoxyhaemoglobin contrast can be used to study cha...

    journal_title：Magnetic resonance imaging

    pub_type： 杂志文章

    doi：10.1016/0730-725x(95)00010-e

    authors： Burdett NG,Menon DK,Carpenter TA,Jones JG,Hall LD

    更新日期：1995-01-01 00:00:00

  • Proton MR properties of lyophilized urine samples from normal and stone former individuals.

    abstract：:Proton MR measurements were performed in lyophilized urine samples collected from 5 normals (N) and 5 idiopathic hypercalciuric recurrent stone formers (SF). T1 and T2 relaxation times were measured with a Bruker PC Multispec at 20 MHz and 37 degrees C in the lyophilized samples and in samples gradually rehydrated. Si...

    journal_title：Magnetic resonance imaging

    pub_type： 杂志文章

    doi：10.1016/0730-725x(88)90522-x

    authors： Azoury R,Abrashkin S,Weininger J,Iaina A

    更新日期：1988-01-01 00:00:00

  • Different magnetic resonance imaging features in two types of nontraumatic rabbit osteonecrosis models.

    abstract：:A single injection of high-dose steroid (20 mg/kg) has been reported to induce necrotic lesions in the proximal metaphysis and diaphysis of the rabbit femur. In the rabbit osteonecrosis (ON) model induced by two-dose horse serum injections, contrast-enhanced magnetic resonance imaging (MRI) and T2*-weighted dynamic MR...

    journal_title：Magnetic resonance imaging

    pub_type： 杂志文章

    doi：10.1016/j.mri.2008.07.001

    authors： Takao M,Sugano N,Nishii T,Sakai T,Nakamura N,Yoshikawa H

    更新日期：2009-02-01 00:00:00

  • Fast reconstruction of highly undersampled MR images using one and two dimensional principal component analysis.

    abstract：:Recent compressed sensing techniques allow signal acquisition with less sampling than required by the Nyquist-Shannon theorem which reduces the data acquisition time in magnetic resonance imaging (MRI). However, prior knowledge becomes essential to reconstruct detailed features when the sampling rate is exceedingly lo...

    journal_title：Magnetic resonance imaging

    pub_type： 杂志文章

    doi：10.1016/j.mri.2015.10.009

    authors： Zong F,d'Eurydice MN,Galvosas P

    更新日期：2016-02-01 00:00:00

  • MRI-guided breast vacuum biopsy: Localization of the lesion without contrast-agent application using diffusion-weighted imaging.

    abstract：OBJECTIVE:In magnetic resonance-guided breast vacuum biopsies, the contrast agent for targeting suspicious lesions can typically be applied only once during an intervention, due to the slow elimination of the gadolinium chelate from the extracellular fluid space. This study evaluated the feasibility of diffusion-weight...

    journal_title：Magnetic resonance imaging

    pub_type： 杂志文章

    doi：10.1016/j.mri.2016.12.006

    authors： Berger N,Varga Z,Frauenfelder T,Boss A

    更新日期：2017-05-01 00:00:00

  • Characterization of light hydrocarbon reservoirs by gradient-NMR well logging.

    abstract：:New methods for acquiring and processing gradient NMR well log data enable signals from gas, light oil, and water to be unambiguously separated and, in many cases, quantified. These methods exploit the combined effects of T1-based and diffusion-based contrast on log response. T1 contrast, which separates the water and...

    journal_title：Magnetic resonance imaging

    pub_type： 杂志文章

    doi：10.1016/s0730-725x(96)00162-2

    authors： Mardon D,Prammer MG,Coates GR

    更新日期：1996-01-01 00:00:00

  • Multispectral analysis of bone lesions in the hands of patients with rheumatoid arthritis.

    abstract：:Quantitative measures of rheumatoid arthritis (RA) disease progression can provide valuable tools for evaluation of new treatments during clinical trials. In this study, a novel multispectral (MS) MRI analysis method is presented to quantify changes in bone lesion volume (DeltaBLV) in the hands of RA patients. Image r...

    journal_title：Magnetic resonance imaging

    pub_type： 杂志文章

    doi：10.1016/j.mri.2004.01.013

    authors： Carano RA,Lynch JA,Redei J,Ostrowitzki S,Miaux Y,Zaim S,White DL,Peterfy CG,Genant HK

    更新日期：2004-05-01 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

    doi：10.1016/0730-725x(87)90023-3

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

    更新日期：1987-01-01 00:00:00

  • Dual-echo breathhold T(2)-weighted fast spin echo MR imaging of liver lesions.

    abstract：:The purpose of this study was to develop a multi-shot dual-echo breathhold fast spin echo technique (DFSE) and compare it with conventional spin echo (T2SE) for T(2)-weighted MR imaging of liver lesions. The DFSE acquisition (EffTE1/EffTE2/TR = 66/143/2100 ms) imaged 5 sections per 17 s breathhold. T2SE imaging (TE1/T...

    journal_title：Magnetic resonance imaging

    pub_type： 杂志文章

    doi：10.1016/s0730-725x(99)00120-4

    authors： Rydberg JN,Tervonen OA,Rydberg DB,Lomas DJ,Ehman RL,Riederer SJ

    更新日期：2000-02-01 00:00:00

  • The prospects for high resolution optical brain imaging: the magnetic resonance perspective.

    abstract：:Various analogs of NMR and MRI are now technically possible in optics; specifically, high-resolution laser-pulse shaping and complex pulse sequence generation with well-defined phase shifts has been demonstrated. Here we summarize this technology and discuss the potential for these methods to enhance optical functiona...

    journal_title：Magnetic resonance imaging

    pub_type： 杂志文章

    doi：10.1016/j.mri.2003.08.024

    authors： Warren WS,Wagner W,Ye T

    更新日期：2003-12-01 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

    doi：10.1016/0730-725x(88)90125-7

    authors： McFarland EW,Neuringer LJ,Kushmerick MJ

    更新日期：1988-09-01 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

    doi：10.1016/s0730-725x(98)00072-1

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

    更新日期：1998-06-01 00:00:00

  • Ovarian Brenner tumors: MR imaging characteristics.

    abstract：:This study describes the appearance of Brenner tumors on MR imaging and compares quantitative signal intensity measurements of Brenner tumors with that of other ovarian tumors. A search of pathologic and MR records disclosed patients who had MRIs showing Brenner tumors prior to surgical excision. Patients (21) with ot...

    journal_title：Magnetic resonance imaging

    pub_type： 临床试验,杂志文章,随机对照试验

    doi：10.1016/s0730-725x(98)00136-2

    authors： Outwater EK,Siegelman ES,Kim B,Chiowanich P,Blasbalg R,Kilger A

    更新日期：1998-12-01 00:00:00

  • Tortuosity measurement and the effects of finite pulse widths on xenon gas diffusion NMR studies of porous media.

    abstract：:We have extended the utility of NMR as a technique to probe porous media structure over length scales of approximately 100-2000 microm by using the spin 1/2 noble gas 129Xe imbibed into the system's pore space. Such length scales are much greater than can be probed with NMR diffusion studies of water-saturated porous ...

    journal_title：Magnetic resonance imaging

    pub_type： 杂志文章

    doi：10.1016/s0730-725x(01)00247-8

    authors： Mair RW,Hürlimann MD,Sen PN,Schwartz LM,Patz S,Walsworth RL

    更新日期：2001-04-01 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

    doi：10.1016/j.mri.2006.07.012

    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

  • Assessment of normal flow patterns in the pulmonary circulation by using 4D magnetic resonance velocity mapping.

    abstract：OBJECTIVE:The purpose of this study was to analyze flow patterns in the pulmonary circulation of healthy volunteers by using 4D flow magnetic resonance imaging. MATERIALS AND METHODS:The study was approved by the local ethics committee and all subjects gave written informed consent. Eighteen volunteers underwent a 4D ...

    journal_title：Magnetic resonance imaging

    pub_type： 杂志文章

    doi：10.1016/j.mri.2012.06.036

    authors： Bächler P,Pinochet N,Sotelo J,Crelier G,Irarrazaval P,Tejos C,Uribe S

    更新日期：2013-02-01 00:00:00

  • In vivo measurement of diffusion and pseudo-diffusion in skeletal muscle at rest and after exercise.

    abstract：:To investigate whether diffusion-related compartmentalization could be observed in skeletal muscle and whether this compartmentalization was affected by exercising, attenuation curves of signal against diffusion weighting were obtained in skeletal muscle of nine healthy volunteers at rest and after an exercise. Fiftee...

    journal_title：Magnetic resonance imaging

    pub_type： 杂志文章

    doi：10.1016/0730-725x(94)00096-l

    authors： Morvan D

    更新日期：1995-01-01 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

    doi：10.1016/0730-725x(92)90371-6

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

    更新日期：1992-01-01 00:00:00

  • Equivalent cross-relaxation rate imaging positively correlates with pathological grade and cell density of adipocytic tumors.

    abstract：OBJECTIVE:Equivalent cross-relaxation rate imaging (ECRI) is an MRI technique used to evaluate qualitative changes in protein-water interactions. We aimed to prospectively evaluate the utility of ECRI for classification of adipocytic tumors. MATERIALS AND METHODS:Institutional Review Board approval was obtained and al...

    journal_title：Magnetic resonance imaging

    pub_type： 杂志文章

    doi：10.1016/j.mri.2013.12.004

    authors： Okuda H,Matsushima S,Sugiura H,Yamada K,Hamada S,Nishida Y,Ishiguro N

    更新日期：2014-04-01 00:00:00

  • In vivo nuclear magnetic resonance imaging and spectroscopy of aquatic organisms.

    abstract：:NMR imaging and localized 1H spectroscopy of a variety of aquatic organisms in vivo is described for the first time. The practical consideration of life support, water volume, salinity, and anesthesia are discussed and solutions presented. Such animal studies shape our understanding of physiology, biochemistry, and bi...

    journal_title：Magnetic resonance imaging

    pub_type： 杂志文章

    doi：10.1016/0730-725x(90)90253-x

    authors： Blackband SJ,Stoskopf MK

    更新日期：1990-01-01 00:00:00

  • The effects of changing water content, relaxation times, and tissue contrast on tissue segmentation and measures of cortical anatomy in MR images.

    abstract：:Water content is the dominant chemical compound in the brain and it is the primary determinant of tissue contrast in magnetic resonance (MR) images. Water content varies greatly between individuals, and it changes dramatically over time from birth through senescence of the human life span. We hypothesize that the effe...

    journal_title：Magnetic resonance imaging

    pub_type： 杂志文章

    doi：10.1016/j.mri.2013.07.017

    authors： Bansal R,Hao X,Liu F,Xu D,Liu J,Peterson BS

    更新日期：2013-12-01 00:00:00

  • Whole lesion histogram analysis of meningiomas derived from ADC values. Correlation with several cellularity parameters, proliferation index KI 67, nucleic content, and membrane permeability.

    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

    pub_type： 杂志文章

    doi：10.1016/j.mri.2018.05.009

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

    更新日期：2018-09-01 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

    doi：10.1016/j.mri.2019.08.008

    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

  • High resolution simultaneous imaging of intracranial and extracranial arterial wall with improved cerebrospinal fluid suppression.

    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

    pub_type： 杂志文章

    doi：10.1016/j.mri.2017.08.004

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

    更新日期：2017-12-01 00:00:00

  • Assessing image artifacts from radiotherapy electromagnetic transponders with metal-artifact reduction imaging.

    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

    pub_type： 杂志文章

    doi：10.1016/j.mri.2019.02.005

    authors： Bergen RV,Ryner L

    更新日期：2019-06-01 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

    doi：10.1016/j.mri.2007.02.014

    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

  • Off-resonance correction using an estimated linear time map.

    abstract：:Images acquired in the presence of magnetic field deviations and reconstructed without taking into account the off-resonance, are distorted and corrupted with artifacts. Several post-processing algorithms have been developed for correcting the distortion when it is not possible to fix the field inhomogeneities. These ...

    journal_title：Magnetic resonance imaging

    pub_type： 杂志文章

    doi：10.1016/s0730-725x(02)00487-3

    authors： Akel JA,Rosenblitt M,Irarrazaval P

    更新日期：2002-02-01 00:00:00

  • Fast and exact flow measurements with the fast Fourier flow technique.

    abstract：:The fast Fourier flow technique offers a convenient way for extremely exact flow measurements. In combination with ECG gating, arterial flow can be studied. The total acquisition time for a single measurement is about 10 s, an ECG-gated cine sequence can be acquired in about 4 min. Fast Fourier flow can, therefore, be...

    journal_title：Magnetic resonance imaging

    pub_type： 杂志文章

    doi：10.1016/0730-725x(88)90473-0

    authors： Hennig J,Mueri M,Brunner P,Friedburg H

    更新日期：1988-07-01 00:00:00

  • Preparation, physico-chemical characterization, and relaxometry studies of various gadolinium(III)-DTPA-bis(amide) derivatives as potential magnetic resonance contrast agents.

    abstract：:Macroscopic protonation constants were measured for a series of DTPA mono- and bis-amide ligands using potentiometric titrations. Proton NMR pH titrations yielded protonation populations of the various nitrogen and oxygen basic sites of the ligands for the different protonation stages. Amide formation decreased the ba...

    journal_title：Magnetic resonance imaging

    pub_type： 杂志文章

    doi：10.1016/0730-725x(94)00117-l

    authors： Geraldes CF,Urbano AM,Alpoim MC,Sherry AD,Kuan KT,Rajagopalan R,Maton F,Muller RN

    更新日期：1995-01-01 00:00:00

  • High-resolution gadolinium-enhanced 3D MRA of the infrapopliteal arteries. Lessons for improving bolus-chase peripheral MRA.

    abstract：:Peripheral magnetic resonance angiography (MRA) is growing in use. However, methods of performing peripheral MRA vary widely and continue to be optimized, especially for improvement in illustration of infrapopliteal arteries. The main purpose of this project was to identify imaging factors that can improve arterial vi...

    journal_title：Magnetic resonance imaging

    pub_type： 杂志文章

    doi：10.1016/s0730-725x(02)00531-3

    authors： Hood MN,Ho VB,Foo TK,Marcos HB,Hess SL,Choyke PL

    更新日期：2002-09-01 00:00:00