نتایج جستجو برای: echo g

تعداد نتایج: 470649  

Journal: :Magnetic resonance in medicine 2009
W Thomas Dixon Daniel J Blezek Lisa A Lowery Dan E Meyer Amit M Kulkarni Brian C Bales Danielle L Petko Thomas K Foo

Rat legs directly injected with superparamagnetic iron oxide (SPIO) were studied by dual-echo, gradient-echo imaging. The amount of iron injected was estimated using a point dipole model for the SPIO injection site. Saturation magnetization of 6:1 PEG/amino modified silane-coated iron oxide particles with 5- to 6-nm core and 20-25 hydrodynamic diameter was approximately 110 emu/g of iron. Estim...

Journal: :journal of cardio-thoracic medicine 0
rajendra gokhroo cardiologist, department of cardiology, j.l.n. hospital , ajmer, rajasthan, india bhanwar ranwa resident of cardiology, department of cardiology, j.l.n. hospital , ajmer, rajasthan,india kamal kapoor resident of cardiology, department of cardiology, j.l.n. hospital , ajmer, rajasthan, india ananthraj avinash resident of cardiology, department of cardiology, j.l.n. hospital , ajmer, rajasthan, india kumari priti resident of cardiology, department of cardiology, j.l.n. hospital , ajmer, rajasthan, india devendra bisht resident of cardiology, department of cardiology, j.l.n. hospital , ajmer, rajasthan,india

cor triatriatum is an acyanotic congenital heart disease. we present a rare case of cor triatriatum sinistrum in a 6-month-old female infant who was presented with cyanosis and failure to thrive. the 2d transthoracic echocardiography and the doppler color flow imaging showed a proximal venous chamber communicating to the distal left atrium  through restrictive opening to the low-pressure, dista...

Journal: :iranian journal of neurology 0
fatemeh bidar ‎department of radiology technology, school of allied medical sciences, shahid ‎beheshti university of medical sciences; tehran, iran fariborz faeghi ‎department of radiology technology, school of allied medical sciences, shahid ‎beheshti university of medical sciences; tehran, iran askar ghorbani iranian center of neurological research, department of neurology, shariati hospital, ‎tehran university of medical sciences, tehran, iran

background: the purpose of this study is to demonstrate the advantages of gradient echo (gre) sequences in the detection and characterization of cerebral venous sinus thrombosis compared to conventional magnetic resonance sequences. methods: a total of 17 patients with cerebral venous thrombosis (cvt) were evaluated using different magnetic resonance imaging (mri) sequences. the mri sequences i...

Journal: :journal of biomedical physics and engineering 0
kh rajabi zadeh baraee f faeghi j jalal shokoohi a saeedi

background:  nowadays mri examinations have been widely used in clinical applications for many diagnoses. the use of contrast agent in mri improves lesion detection and characterization and causes more accurate diagnosis.  objectives: the aim of this study was comparing to optimal dose of magnevist contrast agent in modified t1w se (spin echo), t1w fse (fast spin echo) and t1w gre (gradient ech...

2009
H. Zhu

Introduction: Superparamagnetic iron oxide nanoparticle (SPION) has been widely used in magnetic resonance (MR) lymphography taking advantage of the ability of macrophages to accumulate nanoparticles in lymph nodes [1]. SPIONs lead to hypointense artifacts in conventional MR-lymphography due to magnetic field distortion, creating negative contrast in normal lymph nodes. However, several other s...

Journal: :Disability Studies Quarterly 2012

Journal: :Physical review letters 2006
Mary Laura Lind Gang Duan William L Johnson

Samples of Zr(46.25)Ti(8.25)Cu(7.5)Ni(10)Be(27.5) were isothermally annealed and quenched near the glass transition temperature and studied by the pulse-echo overlap technique. The shear modulus G of the samples shows a strong reversible dependence on annealing temperatures and, thus, on the specific configurational potential energy of the equilibrium liquid. The low-T dependence of G of the co...

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