The second module of the ACR CT accreditation phantom is used to assess what?

The second module of the ACR CT accreditation phantom is specifically designed to assess low-contrast resolution. This aspect is crucial in CT imaging because it evaluates the system's ability to detect small differences in contrast between objects and surrounding tissues. Low-contrast resolution is particularly important in clinical scenarios where subtle differences must be identified, such as in the evaluation of soft tissues or small lesions.

In the context of accreditation, the assessment of low-contrast resolution ensures that the CT scanner can reliably distinguish between structures that have similar densities, which is vital for accurate diagnosis and treatment. This module provides quantitative assessments that help determine the scanner's performance in detecting low-contrast objects, contributing to the overall imaging quality and effectiveness of the CT system.