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

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

更新日期：2017-05-01 00:00:00

abstract：PURPOSE:To introduce a simple analytical formula for estimating T2 from a single Double-Echo in Steady-State (DESS) scan. METHODS:Extended Phase Graph (EPG) modeling was used to develop a straightforward linear approximation of the relationship between the two DESS signals, enabling accurate T2 estimation from one DES...

journal_title：Magnetic resonance imaging

authors： Sveinsson B,Chaudhari AS,Gold GE,Hargreaves BA

更新日期：2017-05-01 00:00:00

abstract：:Magnetic resonance imaging (MRI) and spectroscopy (MRS) have contributed considerably to clinical radiology, and a variety of MR techniques have been developed to evaluate pathological processes as well as normal tissue biology at the cellular and molecular level. However, in comparison to nuclear imaging, MRI has rel...

journal_title：Magnetic resonance imaging

authors： Gore JC,Zu Z,Wang P,Li H,Xu J,Dortch R,Gochberg DF

更新日期：2017-05-01 00:00:00

abstract：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 ...

journal_title：Magnetic resonance imaging

authors： 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

更新日期：2017-05-01 00:00:00

abstract：PURPOSE:The detection of small parenchymal hepatic lesions identified by preoperative imaging remains a challenge for traditional pathologic methods in large specimens. We developed a magnetic resonance imaging (MRI) compatible localization device for imaging of surgical specimens aimed to improve identification and lo...

journal_title：Magnetic resonance imaging

authors： Kinner S,Schubert TB,Nocerino EA,Hynes S,Colgan TJ,Loeffler AG,Brace C,Reeder SB,Winslow E

更新日期：2017-04-01 00:00:00

abstract：:Increasing scientific interest in the zebrafish as a model organism across a range of biomedical and biological research areas raises the need for the development of in vivo imaging tools appropriate to this subject. Development of the embryonic and early stage forms of the subject can currently be assessed using opti...

journal_title：Magnetic resonance imaging

authors： Merrifield GD,Mullin J,Gallagher L,Tucker C,Jansen MA,Denvir M,Holmes WM

更新日期：2017-04-01 00:00:00

abstract：:In this paper, we have presented a two stage method, using kernel principal component analysis (KPCA) and rough set theory (RST), for denoising volumetric MRI data. A rough set theory (RST) based clustering technique has been used for voxel based processing. The method groups similar voxels (3D cubes) using class and ...

journal_title：Magnetic resonance imaging

authors： Phophalia A,Mitra SK

更新日期：2017-02-01 00:00:00

abstract：:Non-CE MRA techniques (true steady-state free-precession, SSFP) have been used effectively for the selective visualization of the portal venous system and inferior vena cava. Budd-Chiari Syndrome (BCS) encompasses a number of conditions that cause the obstruction of the hepatic outflow tract from the small hepatic vei...

journal_title：Magnetic resonance imaging

authors： Yang C,Li C,Zeng M,Lu X,Li J,Wang J,Sami MU,Xu K

更新日期：2017-02-01 00:00:00

abstract：PURPOSE:To develop a RF coil system for joint imaging of intracranial and extracranial arterial vessel wall at 3T. MATERIALS AND METHOD:The coil system consists of a 24-channel head coil combined with an 8-channel carotid coil. It is compared with a standard coil configuration (12-channel head coil+4-channel neck coil...

journal_title：Magnetic resonance imaging

authors： Hu X,Li Y,Zhang L,Zhang X,Liu X,Chung YC

更新日期：2017-02-01 00:00:00

abstract：:Cells labeled by super paramagnetic iron-oxide (SPIO) nanoparticles are more easily seen in gradient echo MR images, but it has not been shown that the amount of nanoparticles or the number of cells can be directly quantified from MR images. This work utilizes a previously developed and improved Complex Image Summatio...

journal_title：Magnetic resonance imaging

authors： Kokeny P,Cheng YN,Liu S,Xie H,Jiang Q

更新日期：2017-01-01 00:00:00

abstract：:The presence of metallic compounds in facial cosmetics and permanent tattoos may affect the quality of magnetic resonance imaging. We report a case study describing a signal artifact due to the use of a leave-on powdered hair dye. On reviewing the ingredients of the product, it was found to contain several metallic co...

journal_title：Magnetic resonance imaging

authors： Chenji S,Wilman AH,Mah D,Seres P,Genge A,Kalra S

更新日期：2017-01-01 00:00:00

abstract：PURPOSE:Investigation of the feasibility of the R2⁎ mapping techniques by using latest theoretical models corrected for confounding factors and optimized for signal to noise ratio. THEORY AND METHODS:The improvement of the performance of state of the art magnetic resonance imaging (MRI) relaxometry algorithms is chall...

journal_title：Magnetic resonance imaging

authors： Siracusano G,La Corte A,Milazzo C,Anastasi GP,Finocchio G,Gaeta M

更新日期：2017-01-01 00:00:00

abstract：:The evaluation of local muscle recruitment during a specific movement can be done indirectly by measuring changes in local blood flow. Intravoxel incoherent motion perfusion imaging exploits some properties of the magnetic resonance to measure locally microvascular perfusion, and seems ideally suited for this task. We...

journal_title：Magnetic resonance imaging

authors： Nguyen A,Ledoux JB,Omoumi P,Becce F,Forget J,Federau C

更新日期：2017-01-01 00:00:00

abstract：:This summary attempts to provide forward-looking concepts regarding gadolinium related toxicity, as discussed in further detail in this issue. ...

journal_title：Magnetic resonance imaging

authors： Semelka RC,Ramalho M,Jay M

更新日期：2016-12-01 00:00:00

abstract：:Gadolinium-based magnetic resonance (MR) contrast agents (GBCM) causes a devastating systemic fibrosing illness, nephrogenic systemic fibrosis (NSF), in patients with reduced kidney function. GBCM targets iron-recycling CD163- and ferroportin-expressing macrophages to release labile iron that mediates gadolinium toxic...

journal_title：Magnetic resonance imaging

authors： Swaminathan S

更新日期：2016-12-01 00:00:00

abstract：OBJECTIVE:This study aims to evaluate the applicability of using single-shot and multi-shot segmented diffusion-weighted imaging (DWI) techniques to support biopsy target localization in a cohort of targeted MRI-guided prostate biopsy patients. MATERIALS AND METHODS:Single-shot echo-planar diffusion-weighted imaging (...

journal_title：Magnetic resonance imaging

authors： Fedorov A,Tuncali K,Panych LP,Fairhurst J,Hassanzadeh E,Seethamraju RT,Tempany CM,Maier SE

更新日期：2016-10-01 00:00:00

abstract：INTRODUCTION:Glioma is the most common type of the primary CNS tumor. Radiotherapy is an important treatment measure after surgery. However, its highly invasive character is the main reason of postoperative recurrence. The aim of the study was to probe the correlation between the invasion ability and the metabolite cha...

journal_title：Magnetic resonance imaging

authors： Xu YJ,Cui Y,Li HX,Shi WQ,Li FY,Wang JZ,Zeng QS

更新日期：2016-10-01 00:00:00

abstract：:In the present work, we reported a new nuclear Overhauser enhancement (NOE)-mediated magnetization transfer (MT) signal at around -1.6ppm (NOE(-1.6)) in rat brain and investigated its application in the detection of acute ischemic stroke in rodent model. Using continuous wave (CW) MT sequence, the NOE(-1.6) is reliabl...

journal_title：Magnetic resonance imaging

authors： Zhang XY,Wang F,Afzal A,Xu J,Gore JC,Gochberg DF,Zu Z

更新日期：2016-10-01 00:00:00

abstract：AIM:Matrix metalloproteases (MMPs) expression and their inhibitors (TIMPs) play an important role in tumor physiopathology, so we investigated the relationship between the magnetic resonance (MR) and MMPs/TIMPs expression by breast carcinomas. MATERIALS AND METHODS:MRI parameters of 64 breast carcinomas were investiga...

journal_title：Magnetic resonance imaging

authors： Cuadriello EF,Fernández-Guinea Ó,Eiró N,González LO,Junquera S,Vizoso FJ

更新日期：2016-10-01 00:00:00

abstract：:Gravity drainage characteristics are important to improve our understanding of gas-liquid or liquid-liquid two-phase flow in porous media. Stable or unstable displacement fronts that controlled by the capillary force, viscous force, gravitational force, etc., are relevant features of immiscible two-phase flow. In this...

journal_title：Magnetic resonance imaging

authors： Teng Y,Liu Y,Jiang L,Song Y,Zhao J,Zhang Y,Wang D

更新日期：2016-09-01 00:00:00

abstract：:Transverse relaxation rates for Carr-Purcell-Meiboom-Gill (CPMG) sequences increase with inter-echo time in presence of microscopic magnetic field inhomogeneities due to nuclear spin diffusion. For a weak field approximation that includes diffusion effects, the CPMG relaxation rate shift for proton diffusion around ca...

journal_title：Magnetic resonance imaging

authors： Kurz FT,Kampf T,Buschle LR,Heiland S,Schlemmer HP,Bendszus M,Ziener CH

更新日期：2016-09-01 00:00:00

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

authors： Matsumoto H,Yoshida Y,Hirata Y

更新日期：2016-09-01 00:00:00

abstract：OBJECTIVE:The purpose of this study is to investigate the correlation between the liver kinetics of gadolinium-ethoxybenzyl-diethylenetriamine pentaacetic acid (Gd-EOB-DTPA) and liver histopathology in a mouse model of NASH by using dynamic contrast-enhanced MRI. MATERIALS AND METHODS:Twenty male C57/BL6 mice aged 8we...

journal_title：Magnetic resonance imaging

authors： Yamada T,Obata A,Kashiwagi Y,Rokugawa T,Matsushima S,Hamada T,Watabe H,Abe K

更新日期：2016-07-01 00:00:00

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

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

更新日期：2016-07-01 00:00:00

abstract：OBJECT:Virtual Phantom Magnetic Resonance Imaging (ViP MRI) is a method to generate reference signals on MR images, using external radiofrequency (RF) signals. The aim of this study was to assess the feasibility of ViP MRI to generate complex-data images of phantoms mimicking water-fat systems. MATERIALS AND METHODS:V...

journal_title：Magnetic resonance imaging

authors： Salvati R,Hitti E,Bellanger JJ,Saint-Jalmes H,Gambarota G

更新日期：2016-06-01 00:00:00

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

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

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

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

abstract：:Dynamic contrast enhanced (DCE) MRI using Tofts' model for estimating vascular permeability is widely accepted, yet inter-tissue differences in bolus arrival time (BAT) are generally ignored. In this work we propose a method, incorporating the BAT in the analysis, demonstrating its applicability and advantages in heal...

journal_title：Magnetic resonance imaging

authors： Liberman G,Louzoun Y,Artzi M,Nadav G,Ewing JR,Ben Bashat D

更新日期：2016-05-01 00:00:00

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

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

更新日期：2016-05-01 00:00:00

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

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

更新日期：2016-02-01 00:00:00

abstract：:Measurements of arterial input function (AIF) can have large systematic errors at standard contrast agent doses in dynamic contrast enhanced MRI (DCE-MRI). We compared measured AIFs from low dose (AIFLD) and standard dose (AIFSD) contrast agent injections, as well as the AIF derived from a muscle reference tissue and ...

journal_title：Magnetic resonance imaging

authors： Wang S,Fan X,Medved M,Pineda FD,Yousuf A,Oto A,Karczmar GS

更新日期：2016-02-01 00:00:00

abstract：PURPOSE:The purposes of this study were to (1) correlate the ultrashort echo time (TE) signal intensity of the pointwise encoding time reduction with radial acquisition (PETRA) sequence with that of the ultrashort echo (UTE) sequence using in vivo meniscal ultrashort TE imaging of the knee with a 3-Tesla (3T) clinical ...

journal_title：Magnetic resonance imaging

authors： Lee YH,Suh JS,Grodzki D

更新日期：2016-02-01 00:00:00

abstract：:In this paper, a new reaction-diffusion model with viscous stress tensor is proposed for modeling the diffusion and invasion of brain glioma cells, which is based on the model in Yuan J.J., Liu L., Hu Q.M. Mathematical modeling of brain glioma growth using modified reaction-diffusion equation on brain MR images. Compu...

journal_title：Magnetic resonance imaging

authors： Yuan J,Liu L

更新日期：2016-02-01 00:00:00

abstract：OBJECTIVE:Our purpose was to evaluate imaging findings of breast cancers according to the dominant stroma type by using kinetic curve analysis and model-based perfusion parameters from dynamic contrast-enhanced magnetic resonance imaging. METHODS:From March 2011 to September 2011, 64 cancers in 64 patients were includ...

journal_title：Magnetic resonance imaging

authors： Yim H,Kang DK,Jung YS,Jeon GS,Kim TH

更新日期：2016-01-01 00:00:00

abstract：PURPOSE:To assess the value of semi-automated segmentation applied to diffusion MRI for predicting the therapeutic response of liver metastasis. METHODS:Conventional diffusion weighted magnetic resonance imaging (MRI) was performed using b-values of 0, 150, 300 and 450s/mm(2) at baseline and days 4, 11 and 39 followin...

journal_title：Magnetic resonance imaging

authors： Stephen RM,Jha AK,Roe DJ,Trouard TP,Galons JP,Kupinski MA,Frey G,Cui H,Squire S,Pagel MD,Rodriguez JJ,Gillies RJ,Stopeck AT

更新日期：2015-12-01 00:00:00

abstract：:Obstructive sleep apnea syndrome (OSAS) is caused by multi-level upper airway obstruction. Anatomic changes at the sites of obstruction may modify the physical or acoustic properties of snores. The surgical success of OSA depends upon precise localization of obstructed levels. We present a case of OSAS who received si...

journal_title：Magnetic resonance imaging

authors： Chen YJ,Shih TT,Chang YC,Hsu YC,Huon LK,Lo MT,Pham VT,Lin C,Wang PC

更新日期：2015-12-01 00:00:00

abstract：:In congenital diaphragmatic hernia (CDH), lung hypoplasia and secondary pulmonary hypertension are the major causes of death and severe disability. Based on new therapeutic strategies survival rates could be improved to up to 80%. However, after surgical repair of CDH, long-term follow-up of these pediatric patients i...

journal_title：Magnetic resonance imaging

authors： Zöllner FG,Daab M,Weidner M,Sommer V,Zahn K,Schaible T,Weisser G,Schoenberg SO,Neff KW,Schad LR

更新日期：2015-12-01 00:00:00

abstract：PURPOSE:To evaluate non-invasive imaging biomarkers for assessing renal fibrosis. DWI is used to assess renal function; intravoxel incoherent motion (IVIM) provides additional measures of perfusion-related diffusion (D*, blood flow; f, perfusion fraction). We aim to determine if reduced ADC seen in renal fibrosis is at...

journal_title：Magnetic resonance imaging

authors： Hennedige T,Koh TS,Hartono S,Yan YY,Song IC,Zheng L,Lee WS,Rumpel H,Martarello L,Khoo JB,Koh DM,Chuang KH,Thng CH

更新日期：2015-12-01 00:00:00

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

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

abstract：:Blood circulation is an important determinant of the biodistribution of superparamagnetic iron oxide nanoparticles. Here we present a magnetic resonance imaging (MRI) technique based on the use of ultrafast echo times (UTE) for the noninvasive determination of blood half-lives at high particle concentrations, when con...

journal_title：Magnetic resonance imaging

authors： Scharlach C,Warmuth C,Schellenberger E

更新日期：2015-11-01 00:00:00