Consider an object comprising two small metal pellets located at (x, y) = (2, 0) and...

Consider an object comprising two small metal pellets located at (x, y) = (2, 0) and (2, 2) and a piece of wire stretched straight between (0, −2) and (0, 0).

(a) Sketch this object.

Assume that N photons are fired at each lateral position in a parallel-ray configuration. For simplicity, assume that each metal object stops 1/2 the photons that are incident upon it no matter what angle it is hit.

(b) Sketch the number of photons you would expect to see as a function of

(c) Draw the projections you would see at

(d) Sketch the backprojection image you would get at (without filtering).