Introduction: Despite growing interest in the use of magnetic resonance imaging (MRI) in the external radiotherapy design process (RT), Computer Tomography (CT) remains a gold standard and is regarded as a basic imaging modality in radiotherapy. MRI shows the high contrast in soft tissues without any radiation exposure to patients. As a result, MRI is used in functional tissue ...

MRI workers are occupationally exposed to static and time-varying gradient magnetic fields.  While the 24-hour time-averaged exposure to static magnetic fields is about a few mT, the maximum static field strength can be as high as 500 mT during patient setup. Over the past several years, our laboratory has performed extensive experiments on the health effects of exposure of animal models and h...

introduction: in radiotherapy, methods of treatment planning are becoming increasingly more complicated. this requires verification of the doses delivered to increasingly smaller and more precise regions. radiotherapy techniques are continuously employing smaller and smaller field sizes to deliver tighter radiation doses with higher therapeutic ratios, generating interest among researchers to p...

a case of cervical ectopic pregnancy in a 37 years old woman with history of two previous cesarean sections and one dilatation/curettage. the case was the advanced cervical pregnancy reported in iran, which diagnosed in 12 week of gestation by mri and finally treated by hysterectomy.

conclusion high-resolution mr images of the wrist using 3d t2space, pd blade and t2 blade were superior to those using conventional sequences quantitatively. high-snr and cnr mr imaging with space and blade would be a promising method to diagnose wrist lesions. results snr of the cartilage, tfcc on 3d t2space and t1 fse was better than other sequences (p < 0.001). snr of the bone on pd blade wa...

how to cite this article: eslamiyeh h, ashrafzadeh f, akhondian j, beiraghi toosi m. homocystinuria: a rare disorder presenting as cerebral sinovenous thrombosis. iran j child neurol. spring 2015;9(2):53-57. abstract objective homocystinuria is an inborn error of amino acid metabolism caused by cystathionine beta-synthase deficiency that affects methionine metabolism. the clinical features are ...