What does the Point Spread Function (PSF) enhance in PET imaging?

The Point Spread Function (PSF) plays a crucial role in enhancing image resolution in PET imaging. It describes how a point source of radioactivity is represented in the imaging system. In ideal conditions, a point source would be imaged as a single point; however, due to various factors in the imaging process, it gets spread out. The PSF characterizes this spreading effect.

By applying PSF modeling techniques, advanced algorithms can refine the PET images to improve the clarity and sharpness, which leads to better resolution. Enhanced resolution allows for the better delineation of structures within the body, making it easier to detect and characterize small lesions or anatomical details.

Improving image resolution does not inherently reduce image noise, enhance image contrast, or directly affect how depth information is perceived. While noise and contrast can be influenced indirectly by the clarity of the image, the primary enhancement attributed to the Point Spread Function in PET imaging is resolution, making it easier to interpret and diagnose based on the acquired images.