introduction:it is well-recognized that collimator-detector response (cdr) is the main image blurring factor in spect.  in this research, we compensated the images for cdr in molecular spect by using stir reconstruction framework. methods: to assess resolution recovery capability of the stir, a phantom containing five point sources along with a micro derenzo phantom were investigated. influence...

As one of the costliest and most frequent natural disasters, flood is a major threat to human lives property. Flood forecasting, simulation, monitoring plays an important role in disaster relief mitigation. With support from JPSS (Joint Polar Satellite System) Proving Ground Risk Reduction (PGRR) Program, VIIRS (Visible Infrared Imaging Radiometer Suite) global 375-m products near real-time, da...

Synthetic Aperture Radar (SAR) is the only way to evaluate deformation of the Earth’s surface from space on the order of centimeters and millimeters due to its coherent nature and short wavelengths. Hence, by this means the long term risk monitoring and security are performed as precisely as possible. Traditional SAR imaging delivers a projection of the 3-D object to the two dimensional (2-D) a...

parameters that have to be measured in gel dosimetry. However, the resolution in gel is strongly dependant on gel composition. Selection of optimum method in dose response readout and proper values of parameters can result in noise reduction as well as improvement of contrast, and spatial resolution considerably. Materials and Methods: MAGICA polymer gel dosimeters were manufactured and irradia...

Remote sensing of the Earth's surface water is critical in a wide range environmental studies, from evaluating societal impacts seasonal droughts and floods to large-scale implications climate change. Consequently, large literature exists on classification satellite imagery. Yet, previous methods have been limited by 1) spatial resolution public imagery, 2) schemes that operate at pixel level, ...

introduction: an efficient method of tomographic imaging in nuclear medicine is positron emission tomography (pet). compared to spect, pet has the advantages of higher levels of sensitivity, spatial resolution and more accurate quantification. however, high noise levels in the image limit its diagnostic utility. noise removal in nuclear medicine is traditionally based on fourier decomposition o...