What is the standard collimator width used in CT AC parameters?

In the context of CT attenuation correction (AC) parameters for PET imaging, collimator width is a critical factor that can influence the accuracy and quality of the images produced. The standard collimator width of 1.5 mm is utilized to balance the need for resolution with the reduction of noise in the images.

Using a collimator width of 1.5 mm ensures an optimal compromise between image clarity and the effective collection of counts, helping to improve the signal-to-noise ratio. A narrower collimator width could enhance spatial resolution but may also lead to increased noise and decreased sensitivity, which can compromise the diagnostic quality of the scans. Conversely, a wider collimator might reduce noise but can result in a loss of spatial resolution.

Therefore, 1.5 mm serves as an established standard that has proven effective in clinical settings for accurate CT AC measurements in PET imaging, allowing for improved diagnostic accuracy and patient outcomes.