Understanding Imaging Performance (I) - Spatial Resolution and Z-Sensitivity

7/25/02


Click here to start


Table of Contents

Understanding Imaging Performance (I) - Spatial Resolution and Z-Sensitivity

Overview

Spatial Resolution

Spatial Resolution

Expressing Spatial Resolution

Expressing Spatial Resolution

Modulation Transfer Function

Measurement of Spatial Resolution

Measurement of Spatial Resolution

Measurement of Spatial Resolution

Measurement of Spatial Resolution

Dependence on Scanner Design

Effective Detector Width

Sampling Rate

Techniques to Improve Resolution

Techniques to Improve Resolution

Techniques to Improve Resolution

Dependence on Scan Parameters

Dependence on Reconstruction Parameters

Resolution in Helical and Multi-Slice CT

Z-Sensitivity

Expressing Z-Sensitivity

Measurement Methods (1)

Measurement Methods (2)

Significance

Effect on CT Number

Effect on CT Number (Partial Volume)

Effect on Contrast and Visibility

Factors Affecting Z-Sensitivity

Z-Sensitivity in Helical Scanning

Helical Z-Sensitivity - Interpolator

Helical Z-Sensitivity - Recon Increment

Summary and Discussion

Author: Nick Keat

Email: nick@impactscan.org

Home Page: www.impactscan.org