New software methods to cope with reduced counting statistics: shorter SPECT acquisitions and many more possibilities

SPECT reconstruction with sub-sinogram acquisitions

Described herein are the advantages of using sub-sinograms for single photon emission computed tomography image reconstruction. A sub-sinogram is a sinogram acquired with an entire data acquisition protocol, but in a fraction of the total acquisition time. A total-sinogram is the summation of all sub-sinograms. Images can be reconstructed from the total-sinogram or from sub-sinograms and then b...

Can Formal Methods Cope with Software-Intensive Systems

a new algorithm and software of individual life insurance and annuity computation

چکیده ندارد.

Photon Counting Statistics for Timescales Longer and Shorter than Laser Coherence Time

The purpose of our experiment is to measure the statistical distribution of photons emitted from a laser on timescales longer and shorter than the laser’s coherence time (τc). Since the coherence time of a typical laser is on the order of 1 ns, we cannot measure the distribution on this timescale due to limitations in the speed of our equipment. However, we can simulate the behavior of a laser ...

a comparison of teachers and supervisors, with respect to teacher efficacy and reflection

supervisors play an undeniable role in training teachers, before starting their professional experience by preparing them, at the initial years of their teaching by checking their work within the proper framework, and later on during their teaching by assessing their progress. but surprisingly, exploring their attributes, professional demands, and qualifications has remained a neglected theme i...