What effect does decreased pitch have on image quality in SDCT?

Decreased pitch in single-detector computed tomography (SDCT) generally reduces image quality. Pitch refers to the speed at which the CT table moves relative to the collimated width of the x-ray beam during a single rotation. When the pitch is decreased, more overlap occurs in the scans, which can lead to increased image sampling. However, while it may suggest a potential for improved spatial resolution, the reality is that a lower pitch can also lead to increased noise levels and artifacts due to longer exposure times, which can ultimately detract from the overall image quality.

Improving image quality often involves optimizing the balance between pitch, noise, and motion artifacts. In contrast, high pitches decrease the amount of data collected per rotation, potentially resulting in lower resolution and poorer quality images due to under-sampling.

In summary, decreased pitch tends to reduce image quality due to increased noise and artifacts, making the correct understanding of how pitch affects imaging within SDCT critical for achieving the best diagnostic outcomes.