Final answer:
Filtered back projection utilizes convolution.
Step-by-step explanation:
Convolution is a mathematical operation used in various fields, including signal processing and image analysis. Out of the three options given, the one that utilizes convolution is filtered back projection. This technique is commonly used in medical imaging, such as computed tomography (CT), to reconstruct an image from multiple projection measurements. Convolution plays a key role in this process to enhance image quality and remove artifacts.