background: adverse effect of sun rays mainly uv ray on the human eye documented and protection of eyes is necessary using different methods such as, sun glasses. sunglasses are designed in different colors. the aim of this study was evaluation of the effect of different colors of sunglasses on the visual acuity, contrast sensitivity, stereopsis and color vision. methods: 81 normal subjects wer...

Introduction: contrast sensitivity is one of the most important psychophysical tests that may be used for the evaluation of refractive state of eye and retinal image quality. Yellow vs. blue color contrast sensitivity may be more suitable in this regard. Materials and Methods: thirty myopic eyes were considered in this study. Yellow vs. blue color contrast sensitivity was evaluated under the sa...

A method is presented for acquiring and visualising physiological parameters using dynamic contrast-enhanced magnetic resonance imaging (CE-MRI). To enable reliable, in vivo measurements of contrast agent uptake, an MRI acquisition is performed using an optimised T1 measurement scheme. Pharmacokinetic modelling of contrast uptake is then performed to obtain physiological parameters relating to ...

determination of normal gastric emptying time and small intestinal transit time are useful in detecting gastrointestinal motility disorders and partial obstructions of the pylorus or small intestine. this study was conducted to evaluate iodixanol as a contrast agent in the gastrointestinal tract in new zealand white rabbit. twelve clinically healthy adult rabbits were prepared and kept for two ...

background: electronic portal imaging devices (epids) play an important role in radiation therapy portal imaging, geometric and dosimetric verifications. a successful utilization of epids for imaging and dosimetric purposes requires a reliable quality control process routine to be carried out regularly. in this study, two in-house phantoms were developed and analyzed for implementation in a qua...