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A study of noise and spatial resolution for 2D and 3D filtered backprojection reconstruction

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2 Author(s)

We present an analysis of the benefits of distance-driven backprojection when used as part of a filtered backprojection reconstruction algorithm, and a comparison with pixel-driven backprojection. We simulated phantoms to quantify image noise and spatial resolution, and performed reconstruction using 2D fan-beam FBP and 3D FDK reconstruction. After matching the resolution for pixel-driven and distance-driven for each region, distance-driven driven backprojection resulted in up to 20% noise reduction relative to pixel-driven backprojection at matched spatial resolution, for a 42 cm×28 cm elliptical water phantom.

Published in:

Nuclear Science Symposium Conference Record, 2004 IEEE  (Volume:6 )

Date of Conference:

16-22 Oct. 2004

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