"Limitations "
"A+B = 1"
Expected headings
"Limitations "
"Filtered back projection is an analytic reconstruction algorithm designed to overcome the limitations of conventional back projection; it applies a convolution filter to remove blurring. It was the primary method in cross-sectional imaging reconstruction."
"This is the mathematical equation solved by computer simultaneously; the example earlier was just a four pixel, imagine them on 250,000."
"It is achieved via an algorithm of 250,000 mathematical equations that can be solved by a high capacity computer. The attenuated profile or projection produced represented by the anatomy is stored in the memory of the computer, solved and reconstructed. Each pixel (picture element) corresponds to the voxel (volume element) of the image."
"Back projection has two distinctive limitations, noise and streak artifacts. It is due to the combination of these restrictions and the advancement of computers that iterative algorithms are slowly replacing the filtered back projection method of image reconstruction."