Fig. 4 (a) Shown here is the Shepp and Logan "head phantom" image. The computer
simulation results shown in this chapter were generated on this image, (b) The Shepp and Logan
phantom is a superposition of 10 ellipses shown here. On a scale of 0 to 2, the various gray levels
in the phantom are also shown.
8 Reconstruction
359
Fig. 5 (a) This figure illustrates a projection of an ellipse. The gray level in the interior of the
ellipse is ρ and zero outside, (b) Shown here is an ellipse with its center located at (jq , y
x
)
Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month, and much more.