What is the term for the artifact appearance on a CT image caused by a faulty detector?

The term for the artifact appearance on a CT image caused by a faulty detector is referred to as "Ring Artifact." This phenomenon is characterized by distinct circular patterns that appear on the CT images, resulting from inconsistencies in the way that specific detectors within the CT scanner are functioning. When a detector is malfunctioning, it can fail to accurately measure the transmitted x-ray data from the subject being imaged, leading to discrepancies in the reconstructed images.

These ring artifacts can obscure clinical information and compromise the diagnostic quality of the scans, making it crucial for imaging professionals to identify and address the underlying issues with the detector or the calibration of the system. Ring artifacts can often be distinguished from other types of artifacts due to their unique circular appearance, which is a direct result of the geometry of the detector array in the CT system.

Understanding the causes of artifacts like ring artifacts is essential for optimizing image quality and ensuring accurate diagnoses in clinical practice.