PURPOSE The aim of this article is to propose an exact SPECT region of interest (ROI) reconstruction method using truncated transmission and truncated emission data. METHODS Recently, the authors published two articles in Physics in Medicine and Biology with two results in SPECT ROI emission image reconstruction. The first result states that if the transmission data are truncated but the emis...

The Persian Gulf States (Bahrain. Iran, Iraq, Kuwait, Qatar, Saudi Arabia and United Arab Emirate) have dominated the oil and gas sector since the discovery of oil in the region. They are the world largest producers of crude oil, producing about 35 and 25 percent of the world natural gas and crude oil respectively. The use of fossil fuels is directly linked to the release of CO2 into...

this study was focused on measuring air pollutants emission from factories producing the asphalt related products in delijan industrial estate, which is the main center of asphalt related products in iran. emissions of four factories were analyzed for air pollutants using a stack analyzer, testo 360, testo co., and germany. the average concentration of all measured stacks for pm, thc, co, nox, ...

Emissions of ammonia (NH3), nitrous oxide (N2O) and methane (CH4) from livestock production may be measured for different reasons in consequence reported a wide range units. For the purpose compiling national inventories emissions those gases, buildings stores usually need to expressed per animal or as proportion nitrogen (N) (NH3 N2O) volatile solids (VS) excreted stored. Much published data o...

New surveys such as ESA's Euclid mission are planned to map with unprecedented precision the large-scale structure of Universe by measuring 3D positions tens millions galaxies. It is necessary develop theoretically modelled galaxy catalogues estimate expected performance and optimise analysis strategy these surveys. We populate two pairs (1 Gpc/h)^3 volume dark-matter-only simulations from UNIT...