What is the average pitch set in CT AC parameters?

The average pitch set in CT attenuation correction (AC) parameters is typically 1. A pitch value of 1 means that the table moves through the scanner at a rate that is equal to the beam width during a single rotation. This setting helps provide a balance between image quality and scanning speed, ensuring that sufficient data is collected for effective attenuation correction while minimizing the potential for artifacts resulting from motion or other image distortions.

When using a pitch of 1, the data acquisition is well-synchronized, yielding high-quality images necessary for accurate attenuation correction in positron emission tomography (PET) scans. This is crucial as proper correction ensures that the PET images reflect the true distribution of the radiotracer within the body, which is essential for accurate diagnosis and treatment planning.

Other pitch values may deliver different balances of image quality and scan time, but a pitch of 1 remains the standard as it provides sufficient coverage and resolution needed for effective CTAC in PET imaging, thus confirming its selection as the average pitch known in clinical practice.