当前位置： SCI文献检索 > MAGNETIC RESONANCE IMAGING期刊下所有文献 > Proton MR properties of lyophilized urine samples from normal and stone former individuals.

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. Significantly (p less than 0.01) prolonged T1 and T2 relaxation times were measured after addition of water to the lyophilized samples. The relaxation time prolongation patterns were significantly different (p less than 0.01) for the two groups; the rehydration curves of the lyophilized urine samples from the SF group had relatively shorter lag than that of N group. In calculations of water compartmentalization for similar water content, significant (p less than 0.01) differences in the fraction of bound water (FB) were found between the two groups. These results may reflect differences in the macromolecular properties, contents, in the amount of water binding sites and/or in the water multilayer thickness between the two groups. These differences, expressed as changes of the relaxation times values may provide new diagnostic possibilities of different renal pathologies.

journal_name

Magn Reson Imaging

journal_title

Magnetic resonance imaging

authors

Azoury R,Abrashkin S,Weininger J,Iaina A

doi

10.1016/0730-725x(88)90522-x

subject

Has Abstract

pub_date

1988-01-01 00:00:00

pages

49-52

issue

1

eissn

0730-725X

issn

1873-5894

pii

0730-725X(88)90522-X

journal_volume

6

pub_type

杂志文章

相关文献

MAGNETIC RESONANCE IMAGING文献大全
  • Functional magnetic resonance cholangiography with Gd-EOB-DTPA: a study in healthy volunteers.

    abstract：PURPOSE:To describe the patterns of bile distribution in the biliary tree, duodenum, jejunum, and stomach, and to determine the gallbladder ejection fraction (GBEF) by using functional magnetic resonance cholangiography (MRC) with gadolinium-ethoxybenzyl-diethylenetriamine penta-acetic acid (Gd-EOB-DTPA) in healthy vol...

    journal_title：Magnetic resonance imaging

    pub_type： 临床试验,杂志文章

    doi：10.1016/j.mri.2014.01.003

    authors： Lee SW,Cha SH,Chung HH,Kim KH,Yeom SK,Seo BK,Je BK,Kim BH

    更新日期：2014-05-01 00:00:00

  • Localization of ischemia in canine hearts using tagged rotated long axis MR images, endocardial surface stretch and wall thickening.

    abstract：:Tagged magnetic resonance imaging allows the noninvasive measurement of regional systolic myocardial deformations and helps localize ischemic regions in the left ventricle (LV). The objective of this study was to evaluate the potential accuracy of localizing ischemic regions in the LV using endocardial and epicardial ...

    journal_title：Magnetic resonance imaging

    pub_type： 杂志文章

    doi：10.1016/s0730-725x(97)00161-6

    authors： Denisova O,Shapiro EP,Weiss JL,Azhari H

    更新日期：1997-01-01 00:00:00

  • Quantitative assessment of rat kidney function by measuring the clearance of the contrast agent Gd(DOTA) using dynamic MRI.

    abstract：:Magnetic resonance imaging (MRI) has been applied to assess kidney function in normal rats by monitoring the passage of the extracellular contrast agent GdDOTA. High-resolution images have been obtained using either the rapid acquisition with relaxation enhancement (RARE) or the snapshot pulse sequence. The latter was...

    journal_title：Magnetic resonance imaging

    pub_type： 杂志文章

    doi：10.1016/s0730-725x(00)00134-x

    authors： Baumann D,Rudin M

    更新日期：2000-06-01 00:00:00

  • Accurate and sensitive measurements of magnetic susceptibility using echo planar imaging.

    abstract：:Susceptibility differences are common causes for artifacts in magnetic resonance (MR); therefore, it is important to choose phantom materials in a way that these artifacts are kept at a minimum. In this study, a previously proposed MR imaging (MRI) method [Beuf O, Briguet A, Lissac M, Davis R. Magnetic resonance imagi...

    journal_title：Magnetic resonance imaging

    pub_type： 杂志文章

    doi：10.1016/j.mri.2006.07.005

    authors： Carlsson A,Starck G,Ljungberg M,Ekholm S,Forssell-Aronsson E

    更新日期：2006-11-01 00:00:00

  • Evaluation of stacked resonators to enhance the performance of a surface receive-only array for prostate MRI at 3 Tesla.

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

    journal_title：Magnetic resonance imaging

    pub_type： 杂志文章

    doi：10.1016/j.mri.2018.07.010

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

    更新日期：2018-11-01 00:00:00

  • Intramuscular adipose tissue determined by T1-weighted MRI at 3T primarily reflects extramyocellular lipids.

    abstract：PURPOSE:The purpose of this study was to assess relationships between intramuscular adipose tissue (IntraMAT) content determined by MRI and intramyocellular lipids (IMCL) and extramyocellular lipids (EMCL) determined by (1)H magnetic resonance spectroscopy ((1)H MRS) or echo intensity determined by B-mode ultrasonograp...

    journal_title：Magnetic resonance imaging

    pub_type： 杂志文章

    doi：10.1016/j.mri.2015.12.038

    authors： Akima H,Hioki M,Yoshiko A,Koike T,Sakakibara H,Takahashi H,Oshida Y

    更新日期：2016-05-01 00:00:00

  • Non-contrast enhanced 3D SSFP MRA of the renal allograft vasculature: a comparison between radial linear combination and Cartesian inflow-weighted acquisitions.

    abstract：:Renal transplant patients often require imaging to ensure appropriate graft placement, to assess integrity of transplant vessel anastomosis and to evaluate for stenosis that can be a cause of graft failure. Because there is risk for nephrogenic systemic fibrosis in the setting of renal insufficiency, the use of non-co...

    journal_title：Magnetic resonance imaging

    pub_type： 杂志文章

    doi：10.1016/j.mri.2013.10.004

    authors： Bultman EM,Klaers J,Johnson KM,François CJ,Schiebler ML,Reeder SB,Block WF

    更新日期：2014-02-01 00:00:00

  • Proton electron double resonance imaging of free radical distribution in environmental science applications--first results and perspectives.

    abstract：:In this contribution, we explore the potential of proton electron double resonance imaging (PEDRI) in environmental science (hydrogeological) applications. After a discussion of the hydrogeological motivation for studies of free radical transport in environmental matrices, we present results from first experiments tha...

    journal_title：Magnetic resonance imaging

    pub_type： 杂志文章

    doi：10.1016/j.mri.2004.11.027

    authors： Nestle N,Shet K,Lurie DJ

    更新日期：2005-02-01 00:00:00

  • 7T CEST MRI: A potential imaging tool for the assessment of tumor grade and cell proliferation in breast cancer.

    abstract：OBJECTIVES:To investigate the feasibility of chemical exchange saturation transfer (CEST) MRI in patients with breast carcinomas and possible correlations between magnetization transfer asymmetry (MTRasym) values and histological features, such as tumor grade and the Ki-67 proliferation index. MATERIALS AND METHODS:Ni...

    journal_title：Magnetic resonance imaging

    pub_type： 杂志文章

    doi：10.1016/j.mri.2019.03.004

    authors： Zaric O,Farr A,Poblador Rodriguez E,Mlynarik V,Bogner W,Gruber S,Asseryanis E,Singer CF,Trattnig S

    更新日期：2019-06-01 00:00:00

  • Effect of off-frequency sampling in magnetic resonance elastography.

    abstract：:In magnetic resonance elastography (MRE), shear waves at a certain frequency are encoded through bipolar gradients that switch polarity at a controlled encoding frequency and are offset in time to capture wave propagation using a controlled sampling frequency. In brain MRE, there is a possibility that the mechanical a...

    journal_title：Magnetic resonance imaging

    pub_type： 杂志文章

    doi：10.1016/j.mri.2011.09.017

    authors： Johnson CL,Chen DD,Olivero WC,Sutton BP,Georgiadis JG

    更新日期：2012-02-01 00:00:00

  • A CT using longitudinally detected ESR (LODESR-CT) of intraperitoneally injected nitroxide radical in a rat's head.

    abstract：:We have developed an in vivo longitudinally detected ESR (LODESR) imaging system operating at 700 MHz based on a loop-gap resonator and a pair of saddle-type pickup coils. A good linear relationship between the LODESR signal intensity and the applied power in a range up to 15.8 W was obtained. The detection of LODESR ...

    journal_title：Magnetic resonance imaging

    pub_type： 杂志文章

    doi：10.1016/s0730-725x(97)82763-4

    authors： Yokoyama H,Sato T,Tsuchihashi N,Ogata T,Ohya-Nishiguchi H,Kamada H

    更新日期：1997-01-01 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

  • Computerized quantification of carotid artery stenosis using MRA axial images.

    abstract：:Currently, the North American symptomatic carotid endarterectomy trial, European carotid surgery trial, and common carotid method are used to measure the carotid stenosis for determining candidates for carotid endarterectomy using the projection angiography from different modalities such as digital subtraction angiogr...

    journal_title：Magnetic resonance imaging

    pub_type： 杂志文章

    doi：10.1016/j.mri.2004.01.007

    authors： Kim DY,Park JW

    更新日期：2004-04-01 00:00:00

  • MR imaging of late onset orbital rhabdomyosarcoma with intracranial extension.

    abstract：:Today, patients with alveolar rhabdomyosarcoma have a favorable prognosis with a survival rate of more than 80%, due to modern radiotherapy. However, those patients with secondary meningeal involvement are still afflicted with a mortality rate of 90% unless a different therapeutic approach is taken. We report a case o...

    journal_title：Magnetic resonance imaging

    pub_type： 杂志文章

    doi：10.1016/0730-725x(93)90035-c

    authors： Judmaier W,Birbamer G,Buchberger W,Mihatsch T,Lener M,Felber S

    更新日期：1993-01-01 00:00:00

  • Imaging focal reperfusion injury following global ischemia with diffusion-weighted magnetic resonance imaging and 1H-magnetic resonance spectroscopy.

    abstract：:The purpose of the study was to determine whether diffusion-weighted magnetic resonance imaging (DWI) could identify focal lesions that develop in ischemia-sensitive cerebral tissues during reperfusion following global brain ischemia. Localized 1H-Magnetic Resonance Spectroscopy (1H-MRS) measurements were also obtaine...

    journal_title：Magnetic resonance imaging

    pub_type： 杂志文章

    doi：10.1016/0730-725x(96)00094-x

    authors： Bizzi A,Righini A,Turner R,Le Bihan D,Bockhorst KH,Alger JR

    更新日期：1996-01-01 00:00:00

  • Noise estimation in single- and multiple-coil magnetic resonance data based on statistical models.

    abstract：:Noise estimation is a challenging task in magnetic resonance imaging (MRI), with applications in quality assessment, filtering or diffusion tensor estimation. Main noise estimators based on the Rician model are revisited and classified in this article, and new useful methods are proposed. Additionally, all the surveye...

    journal_title：Magnetic resonance imaging

    pub_type： 杂志文章

    doi：10.1016/j.mri.2009.05.025

    authors： Aja-Fernández S,Tristán-Vega A,Alberola-López C

    更新日期：2009-12-01 00:00:00

  • Quantitative MRI using T1ρ and T2 in human osteoarthritic cartilage specimens: correlation with biochemical measurements and histology.

    abstract：PURPOSE:A direct correlation between T(1ρ), T(2) and quantified proteoglycan and collagen contents in human osteoarthritic cartilage has yet to be documented. We aimed to investigate the orientation effect on T(1ρ) and T(2) values in human osteoarthritic cartilage and to quantify the correlation between T(1ρ), T(2) vs....

    journal_title：Magnetic resonance imaging

    pub_type： 杂志文章

    doi：10.1016/j.mri.2010.09.004

    authors： Li X,Cheng J,Lin K,Saadat E,Bolbos RI,Jobke B,Ries MD,Horvai A,Link TM,Majumdar S

    更新日期：2011-04-01 00:00:00

  • Microstructure abnormity in the optic nerve of type 1 diabetic rats revealed by diffusion tensor imaging study.

    abstract：:Diabetic retinopathy (DR) is one of a major complication of type 1 diabetes mellitus (T1DM) and a leading cause of blindness. Evidence of animal study has shown that it is not only a microvasucular lesion of the eye, but also a neurodegeneration disease of the visual system. However, the in vivo imaging evidence of ax...

    journal_title：Magnetic resonance imaging

    pub_type： 杂志文章

    doi：10.1016/j.mri.2020.05.003

    authors： Gao L,Huang M,Luo X,Song T,Wang X,Wang Z,Zhang W,Chen J,Lei H

    更新日期：2020-09-01 00:00:00

  • Inherent spatial structure in myelin water fraction maps.

    abstract：:Myelin water fraction (MWF) images in brain tend to be spatially noisy with unknown or no apparent spatial patterns structure, so values are therefore typically averaged over large white matter (WM) volumes. We investigated the existence of an inherent spatial structure in MWF maps and explored the benefits of examini...

    journal_title：Magnetic resonance imaging

    pub_type： 杂志文章

    doi：10.1016/j.mri.2019.09.012

    authors： Baumeister TR,Kolind SH,MacKay AL,McKeown MJ

    更新日期：2020-04-01 00:00:00

  • esfMRI of the upper STS: further evidence for the lack of electrically induced polysynaptic propagation of activity in the neocortex.

    abstract：:Combining electrical stimulation with fMRI (esfMRI) has proven to be an important tool to study the global effects of electrical stimulation on neural networks in the brain. Here we extend our previous studies to stimulating the upper superior temporal sulcus (STS) in the anesthetized monkey. Our results show that sti...

    journal_title：Magnetic resonance imaging

    pub_type： 杂志文章

    doi：10.1016/j.mri.2011.04.005

    authors： Sultan F,Augath M,Murayama Y,Tolias AS,Logothetis N

    更新日期：2011-12-01 00:00:00

  • Mapping the human brain white matter tracts relative to cortical and deep gray matter using diffusion tensor imaging at high spatial resolution.

    abstract：:The mapping of the human brain white matter fiber networks relative to deep subcortical and cortical gray matter requires high spatial resolution which is challenged by the low signal-to-noise ratio. The purpose of this short report was to introduce a whole brain high spatial resolution diffusion tensor imaging (DTI) ...

    journal_title：Magnetic resonance imaging

    pub_type： 杂志文章

    doi：10.1016/j.mri.2008.10.007

    authors： Hasan KM,Kamali A,Kramer LA

    更新日期：2009-06-01 00:00:00

  • Functional magnetic resonance imaging in a stereotactic setup.

    abstract：:The localization of critical structures within the brain is important for the planning of therapeutic strategies. Functional MRI is capable to assess functional response of cortical structures to certain stimuli. The authors present two techniques for functional MRI (fMRI) in a stereotactic set-up. The skull of the pa...

    journal_title：Magnetic resonance imaging

    pub_type： 杂志文章

    doi：10.1016/s0730-725x(96)02108-x

    authors： Debus J,Essig M,Schad LR,Wenz F,Baudendistel K,Knopp MV,Engenhart R,Lorenz WJ

    更新日期：1996-01-01 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

    doi：10.1016/j.mri.2012.06.014

    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

  • Simultaneous acquisition of multiple orders of intermolecular multiple-quantum coherence images in vivo.

    abstract：:Until recently, NMR imaging with intermolecular multiple-quantum coherences (iMQCs) has been based on the acquisition of a single echo. In vivo studies of iMQC image contrast would greatly benefit from a method that could acquire several orders of quantum coherence during the same acquisition. This would enable compar...

    journal_title：Magnetic resonance imaging

    pub_type： 杂志文章

    doi：10.1016/j.mri.2004.10.019

    authors： Shannon KL,Branca RT,Galiana G,Cenzano S,Bouchard LS,Soboyejo W,Warren WS

    更新日期：2004-12-01 00:00:00

  • Exchange dynamics of surfactants in adsorption layers investigated by PFG NMR diffusion.

    abstract：:Surfactant adsorption layers on polystyrene latex particles are investigated concerning their equilibrium exchange dynamics with surfactant molecules in solution. Pulsed field gradient (PFG) nuclear magnetic resonance (NMR) self-diffusion measurements of the nonionic surfactant C12(EO)5 are performed, making use of th...

    journal_title：Magnetic resonance imaging

    pub_type： 杂志文章

    doi：10.1016/s0730-725x(98)00023-x

    authors： Schönhoff M,Söderman O

    更新日期：1998-06-01 00:00:00

  • Dixon-based fat-free MR-angiography compared to first pass and steady-state high-resolution MR-angiography using a blood pool contrast agent.

    abstract：INTRODUCTION:Compared to standard arterial-only first-pass MR-angiography (FPMRA), imaging during the equilibrium phase of a blood pool contrast agent (steady state) has been shown to provide higher image quality and better stenosis grading. Homogenous Dixon fat-suppression promises to increase contrast by suppression ...

    journal_title：Magnetic resonance imaging

    pub_type： 杂志文章

    doi：10.1016/j.mri.2015.07.005

    authors： Homsi R,Gieseke J,Kukuk GM,Träber F,Willinek WA,Schild HH,Hadizadeh DR

    更新日期：2015-11-01 00:00:00

  • Complimentary aspects of diffusion imaging and fMRI: II. Elucidating contributions to the fMRI signal with diffusion sensitization.

    abstract：:Tissue water molecules reside in different biophysical compartments. For example, water molecules in the vasculature reside for variable periods of time within arteries, arterioles, capillaries, venuoles and veins, and may be within blood cells or blood plasma. Water molecules outside of the vasculature, in the extrav...

    journal_title：Magnetic resonance imaging

    pub_type： 杂志文章,评审

    doi：10.1016/j.mri.2007.02.006

    authors： Mulkern RV,Haker SJ,Maier SE

    更新日期：2007-07-01 00:00:00

  • Electrocardiograph-triggered two-dimensional time-of-flight versus optimized contrast-enhanced three-dimensional MR angiography of the peripheral arteries.

    abstract：:We determined whether the accuracy of magnetic resonance angiography (MRA) in the peripheral run-off vessels can be improved by using contrast-enhanced (CE) three-dimensional (3D) technique in comparison to electrocardiograph (ECG)-triggered two-dimensional (2D) time-of-flight (TOF) technique. In a prospective study 2...

    journal_title：Magnetic resonance imaging

    pub_type： 杂志文章

    doi：10.1016/s0730-725x(98)00078-2

    authors： Vosshenrich R,Kopka L,Castillo E,Böttcher U,Graessner J,Grabbe E

    更新日期：1998-10-01 00:00:00

  • Compensation of susceptibility-induced signal loss in echo-planar imaging for functional applications.

    abstract：:Functional magnetic resonance imaging favors the use of multi-slice gradient-recalled echo-planar imaging due to its short image acquisition times, whole brain coverage and sensitivity to BOLD contrast. However, despite its advantages, gradient-recalled echo-planar imaging also is sensitive to static magnetic field gr...

    journal_title：Magnetic resonance imaging

    pub_type： 杂志文章

    doi：10.1016/s0730-725x(00)00199-5

    authors： Cordes D,Turski PA,Sorenson JA

    更新日期：2000-11-01 00:00:00

  • A non-invasive technique for 3-dimensional assessment of articular cartilage thickness based on MRI. Part 1: Development of a computational method.

    abstract：:Articular cartilage thickness is of relevance in various fields in diagnostics and biomedical research. In view of recent improvements of MR cartilage imaging a computational method has been developed for three-dimensional determination of cartilage thickness from tomographic datasets. A correction algorithm that comp...

    journal_title：Magnetic resonance imaging

    pub_type： 杂志文章

    doi：10.1016/s0730-725x(97)00012-x

    authors： Lösch A,Eckstein F,Haubner M,Englmeier KH

    更新日期：1997-01-01 00:00:00