Increasing concerns about radiation dose have led CT manufacturers to further develop radiation dose reduction tools in the latest generation of CT scanners. These tools include automated tube current modulation, automated tube potential selection, and iterative reconstruction. This review details the principles underlying each of these 3 dose reduction utilities and their different permutation...

3D IMAGE RECONSTRUCTION FROM SERIAL SECTIONS

TRADEOFFS AND LIMITATIONS IN STATISTICALLY BASED IMAGE RECONSTRUCTION PROBLEMS

PURPOSE: Simultaneous multislice (SMS) imaging is an effective method for accelerating fMRI and DTI because it can provide acceleration even with the single-shot acquisitions commonly used in these applications. Previous SMS methods have either focused on Cartesian trajectories [1], or used time-consuming iterative SENSE-like reconstructions on spiral data [2]. We propose a non-iterative GRAPPA...

Statistical Tomographic Image Reconstruction Methods for Randoms-Precorrected PET Measurements

A b s t r a c t .

For characterization and activity distribution of radioisotopes in nuclear waste, Active and Passive Computed Tomography (A&PCT) method can be employed. During the Active CT measurements, an external gamma/X-ray source is used to determine the attenuation map of the object. With this knowledge of the attenuation map, the Passive CT measurements are then carried out to reconstruct the activity o...