conclusion we constructed and validated a ct colonography phantom with correct density allowing performance of reproducible experiments. materials and methods we found 15 different phantom designs by literature search and compared their advantages and disadvantages based on their description and images. we tested various materials for density and mechanical properties and constructed a phantom ...

background: low back pain is a common health problem that has many consequences, including disability and absence from work.this study aimed to determine the prevalence of low back pain among women referred to quds clinic in tehran, iran.  material and methods: this cross-sectional study was conducted on women referred to quds clinic, in east of tehran. a total of 100 patients were studied over...

background: low back pain is the most common cause of disability and absence from work among young and middle-aged people. as there is limited knowledge regarding this problem among iranian students, this study aimed to determine the preva­lence of low back pain and its ‘related socio­demo­graphic factors among students of islamic azad university, tehran, iran.    material and methods: this is ...

context low back pain (lbp) is among the most prevalent musculoskeletal conditions in the developed countries. it is a common problem causing disability and imposing a huge economic burden to individuals and state organizations. imaging plays an important role in diagnosis of the etiology of lbp. evidence acquisition the electronic databases included: pubmed (1950 to present), ovid sp medline (...

background: low back pain (lbp) is one of the most common musculoskeletal complications of today’s societies which, poses a big portion of health expenses and work absentees. lumbar disc herniation is claimed to be one of the several causes of lbp. conservative therapies like physiotherapy are found to be beneficial for treatment in such a kind of lbp. however, there is low evidence proving tra...

in this research the effect of substituting sugars (glucose and sucrose) by low caloric sweeteners (sorbitol and isomalt) on the physical properties of gazz was studied. textural properties of gaz were investigated using instron and micro-structure was studied by scanning electron microscope (sem). the results of texture investigation showed that the sample containing 25% of sorbitol and 65% of...

external root resorption may be an uncontrolled phenomenon, and the most known interventions have no effect. even progressive external root resorption may not be controlled by long term ca(oh)2 therapy. currently, there are no treatment options for vital tooth that suffer from root resorption. this invasive resorption can lead to extraction of the tooth. the use of new technologies such as low ...

objective(s):  denaturing high performance liquid chromatography (dhplc) is a high throughput approach for screening dna sequence variations. to assess oven calibration, cartridge performance, buffer composition and stability, the wave low and high range mutation standards are employed to ensure reproducibility and accuracy of the chromatographic analysis. the purpose of this study was to provi...

background : twin pregnancies are commonly associated with low birth weight (lbw) infants. most studies focus on growth of lbw compared with normal infants in singleton. however, there has not been any study on twins to com-pare lbw with normal birth weight (nbw) infants as a match control of the same twin. methods : this cohort study was conducted at healthcare centers of kashan, in 2013. twin...

objective: maternal hypovitaminosis d may impair fetal growth and cause adverse pregnancy outcomes including intrauterine growth restriction and neonatal low birth weight. the aim of this study is to evaluate the relationship between maternal vitamin d status and neonate’s birth weight. materials and methods: a cross-sectional, descriptive analytical study was carried out in the nursery ward of...