BACKGROUND Differentiation between tumor recurrence/vital tumor tissue and radionecrosis based on conventional diagnostic imaging is impossible because of the likeness of the images. In such circumstances advanced MRI techniques (PWI, DWI, 1HMRS) seem to be helpful. The aim of our study was to evaluate the diagnostic effectiveness of PWI, DWI and 1HMRS in the differentiation of the tumor recurr...

zinc is one of the most important micronutrient with essential role in biochemical regulation of the body functions. the importance of zinc in pregnancy period was widely studied in various countries. variation in zinc plasma levels during pregnancy needs more investigation, because maternal zinc deficiencies may cause some severe abnormalities in the fetus. in this study the plasma levels of z...

Renovation and modernization can lead to changes in various fields, including material and immaterial values of the family. The process of cultural modernization has also brought about changes in the socio-cultural context of societies that have led to changes in family values. Therefore, the present study was aimed at the effect of cultural modernization on family values among high school stud...

This study aims to investigate the role played by social networks, including Facebook and Telegram, in changing the social life styles of the young and middle-aged generations of Iranian society. The research method consists of survey group of 512 people of the young and middle-aged generations selected from 5 provinces using multi-stage cluster sampling. Data were collected using a research-ma...

BACKGROUND Anti-angiogenic treatment in recurrent glioblastoma patients suppresses contrast enhancement and reduces vasogenic edema while non-enhancing tumor progression is common. Thus, the importance of T2-weighted imaging is increasing. We therefore quantified T2 relaxation times, which are the basis for the image contrast on T2-weighted images. METHODS Conventional and quantitative MRI pr...

BACKGROUND AND PURPOSE For cases of multiple sclerosis (MS), magnetization transfer (MT) imaging may provide more pathologically specific and accurate estimates of the disease process than does conventional imaging. In this study, we evaluated changes of the MT ratio (MTR) of newly enhancing lesions, the MTR of normal-appearing white matter (NAWM), the average lesion MTR, and the MT histogram-d...

BACKGROUND AND PURPOSE (1)H-MR spectroscopy is a useful tool in brain tumor evaluation. A critical point in obtaining representative spectra is the correct voxel positioning, which can be more accurate after Gd administration. Some experimental data suggested that Gd could cause Cho signal loss. Our aim was to evaluate the effect of Gd in the Cho peak area and width in patients with GBM. MATE...

The monetizing of internet users’ personal information has become a very popular revenue source in the Web 2.0 age. Although users commonly accept the commercialization of their personal information in exchange for using services free of charge, this can lead to privacy concerns. Previous studies have investigated consumers’ willingness to pay for privacy protection. It has been shown that some...