نتایج جستجو برای: magnetic resonsnce imaging

تعداد نتایج: 678720  

تکاور, عباس ,

Basic physical principles of nuclear magnetic resonance imaging (N.M.R.I), a nonionizing medical imaging technique, are described. Principles of NMRI with other conventional imaging methods, ie, isotope scanning, ultrasonography and radiography have been compared. T1 and T2 and spin density (S.D.) factors and different image construction techniques based on their different combinations is discu...

Journal: :iranian journal of medical sciences 0
masoud shayesteh azar department of orthopaedics, imam khomeini hospital, mazandaran, iran seyed ahmad shahab kowsarian department of orthopaedics, imam khomeini hospital, mazandaran, iran mohammad ali mohseni-bandpei department of orthopaedics, imam khomeini hospital, mazandaran, iran atefeh hadian department of orthopaedics, imam khomeini hospital, mazandaran, iran

kienbock's disease, which is an idiopathic osteonecrosis and collapse of the lunate bone, is an uncommon disease in children. this report describes a case of an 11-year-old girl, who presented with avascular necrosis of lunate bone confirmed by radiographic and magnetic resonance imaging evidence. after a short period of casting, the case was fully recovered within one year. the signal change w...

A Salajegheh H Barghi Hadi Ebrahimnejad, Hamed Ebrahimnejad,

Modern challenges of food science require a new understanding of the determinants of food quality and safety. Application of advanced imaging modalities such as magnetic resonance imaging (MRI) has seen impressive successes and fast growth over the past decade. Since MRI does not have any harmful ionizing radiation, it can be considered as a magnificent tool for the quality control of food prod...

Farkhonde Salehi, Farzad Moradi, Saleh Salehi Zahabi, Shahriar Asgari,

In recent years, the development of neuroimaging techniques such as high-resolution magnetic resonance imaging (MRI), functional magnetic resonance imaging (fMRI), positron emission tomography (PET), or single photon emission tomography (SPECT) has promoted the identification of structural and functional characteristics underlying mental disorders to a great extent. In anxiety disorders, recent...

Atefeh Hadian Masoud Shayesteh Azar, Mohammad Ali Mohseni-Bandpei Seyed Ahmad Shahab Kowsarian

Kienbock's disease, which is an idiopathic osteonecrosis and collapse of the lunate bone, is an uncommon disease in children. This report describes a case of an 11-year-old girl, who presented with avascular necrosis of lunate bone confirmed by radiographic and magnetic resonance imaging evidence. After a short period of casting, the case was fully recovered within one year. The signal change w...

B. Shojaei D. Vosough, M. Molazem

The purpose of this study was to investigate magnetic resonance imaging (MRI) of the normal feline eyeand optic nerves using T1-weighted and T2-weighted images. A total of 6 healthy female domestic short haircats age 2-2.5 years and weighing 3.2 ± 0.4 kg were selected. Magnetic resonance imaging data werecollected using GEMSOW (Philips) at a magnetic field strength of 1.5 T. Dorsal, sagittal, a...

Journal: :iranian journal of medical sciences 0
prashant s. naphade department of radiology, employee’s state insurance corporation hospital, mumbai, india abhishek keraliya department of radiology, employee’s state insurance corporation hospital, mumbai, india

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Journal: :iranian journal of veterinary research 2009
d. vosough b. shojaei m. molazem

the purpose of this study was to investigate magnetic resonance imaging (mri) of the normal feline eyeand optic nerves using t1-weighted and t2-weighted images. a total of 6 healthy female domestic short haircats age 2-2.5 years and weighing 3.2 ± 0.4 kg were selected. magnetic resonance imaging data werecollected using gemsow (philips) at a magnetic field strength of 1.5 t. dorsal, sagittal, a...

Journal: :iranian journal of medical physics 0
ali asghar mowlavi physics department, hakim sabzevari university, sabzevar, iran. international centre for theoretical physics (ictp), associate and federation schemes, medical physics field, trieste, italy.

introduction range and diffusion of positron-emitting radiopharmaceuticals are important parameters for image resolution in positron emission tomography (pet). in this study, geant4 toolkit was applied to study positron diffusion in soft tissues with and without a magnetic field for six commonly used isotopes in pet imaging including 11c, 13n, 15o, 18f, 68ga, and 82rb. materials and methods gea...

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