Analytical Noise and Slice-sensitivity-profile Models for Multi-slice Helical CT

摘要

Multi-slice computed tomography (MSCT) is one of the most recent technological advancements in CT. Several experimental studies have been conducted in the last few years on the performance of MSCT. However, there is a lack of theoretical analysis on the slice sensitivity profile (SSP) and noise performance. In this paper, we derive several clpsed-form expressions to characterize these performance parameters under different detector configurations and acquisition modes. Following the common practice, the expressions are explicitly described for regions near the iso-center, although the same approach can be used to describe system performances away from the iso-center. Our models are validated against phantom experiments.