hypothalamic hamartoma (hh) is a rare intracranial lesion that usually presents with classic triad of central precocious puberty, gelastic epilepsy, and developmental delay. herein, a 14-year old boy is presented in whom the diagnosis of hh was made by magnetic resonance imaging. while he did not have any complain of precocious puberty, he surprisingly suffered from delay in puberty. the defini...

considering the nonlinear hyperelastic or viscoelastic nature of soft tissues has an important effect on modeling results. in medicalapplications, accounting nonlinearity begets an ill posed problem, due to absence of external force. myocardium can be consideredas a hyperelastic material, and variational approaches are proposed to estimate stiffness matrix, which take into account the linearand...

magnetic resonance imaging (mri) contrast agents most commonly agents used in diagnosing different diseases. several agents have been ever introduced with different peculiar characteristics. they vary in potency, adverse reaction and other specification, so it is important to select the proper agent in different situations. we conducted a systematic literature search in medline/pubmed, web of s...

background: magnetic resonance imaging (mri) is the standard method for observing brain plaques and contrast material injection is necessary for demonstrating the active plaque.this study compared the rate of enhancement of plaques with gadovist and magnevist in relapse phase of ms. methods: in this double blind study, after neurological examination of 62 patients in the attack phase of ms, two...

background: back pain is a common patients’ complaint, and its etiology is important because of different potential treatment approaches (based on causes). for a better diagnosis, magnetic resonance imaging (mri) is widely used in clinical settings that may result in inappropriate requests. this study aims to evaluate the appropriateness of the lumbosacral mri requests in patients with back pai...

conclusion due to the significant improvement in the treatment of early stage of hcc compared to the previous decade, we suggest a fast, non-invasive, more accurate, but more expensive method (haste, op/ip t1w sequences mri combined with dwi) rather than us for the screening of hcc in liver cirrhosis. results combination of limited sequences mri and dwi had the highest accuracy (94.79%) followe...

background previous studies have proven the development of white matter hyperintensities (wmh) in methamphetamine and opioid users. opiates and methamphetamines (ma) are the most common addictive agents in iran. the adverse effects of drugs on the cns is of concern to specialists and researchers, and given that the neurotoxicity associated with methamphetamine is greater than opioids, it is hyp...

purpose this study was performed to introduce and evaluate the potential of kinematic magnetic resonance imaging (kmri) using a high-field open-magnet magnetic resonance (mr) system. methods we attempted to perform kmri of healthy volunteers’ lumbar spine and knee in the lateral position and ankle in the supine position utilizing the superconducting, horizontally opened, 1.2 t mr system (oasis,...