Automated classification of multispectral MR images using unsupervised constrained energy minimization based on fuzzy logic.

abstract：PURPOSE:Lower fat fraction (FF) in brown adipose tissue (BAT) than white adipose tissue (WAT) has been exploited using Dixon-based Magnetic Resonance Imaging (MRI) to differentiate these tissues in rodents, human infants and adults. We aimed to determine whether an optimal FF threshold could be determined to differenti...

journal_title：Magnetic resonance imaging

authors： Jones TA,Wayte SC,Reddy NL,Adesanya O,Dimitriadis GK,Barber TM,Hutchinson CE

更新日期：2018-09-01 00:00:00

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

authors： Blackband SJ,Stoskopf MK

更新日期：1990-01-01 00:00:00

abstract：:Percentage of lipid content of 22 adrenal cortex lesions and their water proton longitudinal relaxation time were measured in vitro at 60 MHz. Although water relaxation times obtained on benign and malignant samples overlap each other, measurements of the percentage of lipids performed on the same tissues allow us to ...

journal_title：Magnetic resonance imaging

authors： Leroy-Willig A,Roucayrol JC,Luton JP,Courtieu J,Niesenbaum N,Louvel A

更新日期：1987-01-01 00:00:00

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

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

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

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

abstract：:Respiratory motion and capnometry monitoring were performed during blood oxygen level-dependent (BOLD) functional magnetic resonance imaging (fMRI) of the brain while a series of paced hyperventilation tasks were performed that caused significant hypocapnia. Respiration volume per time (RVT) and end-tidal carbon dioxi...

journal_title：Magnetic resonance imaging

authors： Vogt KM,Ibinson JW,Schmalbrock P,Small RH

更新日期：2011-11-01 00:00:00

abstract：PURPOSE:To investigate the alterations in water-fat (W-F) ratio of the normal breast tissue of female volunteers as a function of the histological phases of the menstrual cycle. METHODS:Image-guided volume localized in vivo proton ((1)H) magnetic resonance spectroscopy (MRS) at 1.5 T was carried out in the para-areola...

journal_title：Magnetic resonance imaging

authors： Sharma U,Kumar M,Sah RG,Jagannathan NR

更新日期：2009-07-01 00:00:00

abstract：:Liposomes entrapping gadolinium-DTPA (Gd-DTPA) were synthesized from 60 mole percent egg phosphatidylcholine (EPC) and 40 mole percent cholesterol or EPC alone entrapping Gd-DTPA in diameters of 100 and 200 nm. Rats bearing Morris hepatoma in their flanks were imaged by MR pre- and post-contrast with free Gd-DTPA and ...

journal_title：Magnetic resonance imaging

authors： Unger EC,MacDougall P,Cullis P,Tilcock C

更新日期：1989-07-01 00:00:00

abstract：:The objective of our study was to assess the feasibility of dynamic susceptibility contrast MR technique after bolus injection of SPIO and Gd-DOTA in a tumor model implanted in rats. Tumors were subcutaneously implanted in 24 rats. A FLASH sequence and EPI were evaluated. Different doses of AMI 227 and Gd-DOTA were as...

journal_title：Magnetic resonance imaging

authors： Loubeyre P,De Jaegere T,Miao Y,Landuyt W,Marchal G

更新日期：1999-05-01 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：:Multi-contrast magnetic resonance imaging (MRI) is a useful technique to aid clinical diagnosis. This paper proposes an efficient algorithm to jointly reconstruct multiple T1/T2-weighted images of the same anatomical cross section from partially sampled k-space data. The joint reconstruction problem is formulated as m...

journal_title：Magnetic resonance imaging

authors： Huang J,Chen C,Axel L

更新日期：2014-12-01 00:00:00

abstract：:The purpose of this study was to demonstrate the initial results of the dynamic contrast-enhanced MRA in under four seconds in the assessment of anomalous pulmonary circulation. We performed dynamic contrast enhanced MRA on ten patients with a temporal resolution of 2-3 sec for each phase. Five patients had pulmonary ...

journal_title：Magnetic resonance imaging

authors： Balci NC,Yalçin Y,Tunaci A,Balci Y

更新日期：2003-01-01 00:00:00

abstract：:Super paramagnetic iron oxide Fe(3)O(4) nanoparticles prepared via photochemical reaction in pure form were used for inducing hyperthermia to treat subcutaneous Ehrlich carcinoma implanted in female mice. Our results indicate that the mean temperature profiles at the rectum, periphery of the tumor surface and at the c...

journal_title：Magnetic resonance imaging

authors： Elsherbini AA,Saber M,Aggag M,El-Shahawy A,Shokier HA

更新日期：2011-02-01 00:00:00

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

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

abstract：PURPOSE:To evaluate the utility of fat fraction (FF) for the differentiation of different breast tissues and in various breast tumor subtypes using in vivo proton (1H) magnetic resonance spectroscopy (MRS). METHODS:1H MRS was performed on 68 malignant, 35 benign, and 30 healthy volunteers at 1.5 T. Malignant breast ti...

journal_title：Magnetic resonance imaging

authors： Agarwal K,Sharma U,Mathur S,Seenu V,Parshad R,Jagannathan NR

更新日期：2018-06-01 00:00:00

abstract：:A new application of the stimulated echo pulse sequence is presented that permits the elucidation of molecular order and dynamics in a time scale between about 100 microseconds and the spin-lattice relaxation time. The technique exploits the influence of dipolar coupling on the quotient of the stimulated and primary e...

journal_title：Magnetic resonance imaging

authors： Grinberg F,Kimmich R,Stapf S

更新日期：1996-01-01 00:00:00

abstract：:It has previously been observed that during isometric dorsiflexion exercise, the time course of T2-weighted signal intensity (SI) changes is spatially heterogeneous. The purpose of this study was to test the hypothesis that this spatial heterogeneity would increase at higher contraction intensities. Eight subjects per...

journal_title：Magnetic resonance imaging

authors： Damon BM,Wadington MC,Lansdown DA,Hornberger JL

更新日期：2008-10-01 00:00:00

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

authors： Mesin L

更新日期：2020-12-01 00:00:00

abstract：PURPOSE:To evaluate whether semi-quantitative analysis of high temporal resolution dynamic contrast-enhanced MRI (DCE-MRI) acquired early in treatment can predict the response of locally advanced breast cancer (LABC) to neoadjuvant chemotherapy (NAC). MATERIALS AND METHODS:As part of an IRB-approved prospective study,...

journal_title：Magnetic resonance imaging

authors： Abramson RG,Li X,Hoyt TL,Su PF,Arlinghaus LR,Wilson KJ,Abramson VG,Chakravarthy AB,Yankeelov TE

更新日期：2013-11-01 00:00:00

abstract：:The purpose of this study was to analyze background parenchymal enhancement (BPE) in the contralateral normal breast of cancer patients during the course of neoadjuvant chemotherapy (NAC). Forty-five subjects were analyzed. Each patient had three MRIs, one baseline (B/L) and two follow-up (F/U) studies. The fibrogland...

journal_title：Magnetic resonance imaging

authors： Chen JH,Yu H,Lin M,Mehta RS,Su MY

更新日期：2013-11-01 00:00:00

abstract：:We compared the ability and reproducibility of a fast fluid-attenuated inversion recovery (fast-FLAIR) sequence with and without a magnetization transfer (MT) pulse for detecting and measuring multiple sclerosis (MS)-related abnormalities on magnetic resonance imaging (MRI) scans from 20 patients. The Contrast-to-Nois...

journal_title：Magnetic resonance imaging

authors： Filippi M,Rocca MA,Mastronardo G,Comi G

更新日期：1999-04-01 00:00:00

abstract：:We compared the ability of magnetic resonance imaging (MRI) using a 0.064 T permanent magnet, three-phase bone scanning, and indium-labeled white blood cell (111In-WBC) scanning, to diagnose osteomyelitis. Twenty-three patients underwent biopsy. All patients were examined at presentation with all three modalities. Sen...

journal_title：Magnetic resonance imaging

authors： Williamson MR,Quenzer RW,Rosenberg RD,Meholic AJ,Eisenberg B,Espinosa MC,Hartshorne MF

更新日期：1991-01-01 00:00:00

abstract：:We have synthesized a surface functionalized superparamagnetic iron oxide colloid whose clearance from the vascular compartment was inhibited by asialofetuin but not fetuin. Unlike other particulate or colloidal magnetic resonance (MR) contrast agents, the agent of the current communication is not withdrawn from the v...

journal_title：Magnetic resonance imaging

authors： Josephson L,Groman EV,Menz E,Lewis JM,Bengele H

更新日期：1990-01-01 00:00:00

abstract：:The purpose of this study is to report the significant differences found in the identification of lesions in cervical spinal cord of two patients with multiple sclerosis when using the BLADE T2-TSE and BLADE T2-TIRM sequences as opposed to the conventional T2-TSE and T2-TIRM sequences for sagittal acquisition at 1.5T....

journal_title：Magnetic resonance imaging

authors： Lavdas E,Mavroidis P,Topaltzikis T,Slatinopoulos V,Roka V,Vlachopoulou A,Papanikolaou N,Stathakis S,Kapsalaki E,Batsikas G

更新日期：2013-12-01 00:00:00

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

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

abstract：:Pellets of HeLa from suspension cultured cells in isotonic medium (300 mosmolar) were introduced into a Bruker CXP100 NMR spectrophotometer at 80 mHz within 5 min of the start of centrifugation. T1 and T2 times were measured within a total elapsed time of 20-25 min at 80 mHz and 37 degrees C, and averaged 1430 msec an...

journal_title：Magnetic resonance imaging

authors： Wheatley DN,Rimmington JE,Foster MA

更新日期：1990-01-01 00:00:00

abstract：:The purpose of this study was to test whether an empirical mathematical model (EMM) of dynamic contrast-enhanced magnetic resonance imaging (DCE-MRI) can distinguish between benign and malignant breast lesions. A modified clinical protocol was used to improve the sampling of contrast medium uptake and washout. T(1)-we...

journal_title：Magnetic resonance imaging

authors： Fan X,Medved M,Karczmar GS,Yang C,Foxley S,Arkani S,Recant W,Zamora MA,Abe H,Newstead GM

更新日期：2007-06-01 00:00:00

abstract：:Diffraction ideas were first introduced to NMR by Mansfield and Grannell. Here we compare "Mansfield (k-space) diffraction" with the "diffusive (q-space) diffraction," noting their similarities and differences. The diffusive-diffraction concept is extremely helpful in elucidating the Pulsed Gradient Spin Echo NMR expe...

journal_title：Magnetic resonance imaging

authors： Callaghan PT

更新日期：1996-01-01 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：PURPOSE:To evaluate the feasibility of an optimized bright blood MRI protocol at 3 T in combination with contrast agent administration for the detection and characterization of aortic high-risk plaques for the improved workup of acute stroke patients. MATERIALS AND METHODS:ECG synchronized T1-weighted 3D gradient echo...

journal_title：Magnetic resonance imaging

authors： Markl M,Dudler P,Fydrychowicz A,Strecker C,Weiller C,Hennig J,Harloff A

更新日期：2008-04-01 00:00:00