Final answer:
Longitudinal interpolation with z-axis filtering is a technique used in computed tomography (CT) imaging to improve image quality by reducing artifacts and improving the accuracy of the reconstructed image. It calculates the filtered backprojection, which is the process of reconstructing an image from a set of projection data.
Step-by-step explanation:
Longitudinal interpolation with z-axis filtering is a technique used in computed tomography (CT) imaging to improve image quality by reducing artifacts and improving the accuracy of the reconstructed image. It calculates the filtered backprojection, which is the process of reconstructing an image from a set of projection data.
By interpolating and filtering the projection data along the longitudinal axis (z-axis), the technique helps to minimize ring artifacts, which are circular patterns that can appear in CT images. The interslice distance, or the distance between consecutive image slices, is not directly calculated by longitudinal interpolation with z-axis filtering. Instead, it improves the overall image quality and accurately reconstructs the image while reducing artifacts.
Therefore, the correct answer is: c) filtered backprojection.