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Modulation transfer function of the EMI CT head scanner
Author(s) -
Bischof C. J.,
Ehrhardt J. C.
Publication year - 1977
Publication title -
medical physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.473
H-Index - 180
eISSN - 2473-4209
pISSN - 0094-2405
DOI - 10.1118/1.594305
Subject(s) - scanner , optical transfer function , emi , optics , point spread function , modulation (music) , transfer function , physics , image resolution , electromagnetic interference , materials science , acoustics , electronic engineering , engineering , electrical engineering
The two‐dimensional modulation transfer function [MTF(ν x ,ν y )] has been determined for the EMI CT head scanner by measuring the point spread function (PSF) in different locations in the field of view. This PSF was obtained by scanning a fine wire supported perpendicular to the tomographic slice. Based on these MTFs, the resolving power of the EMI scanner was found to be 3.1 line pairs/cm. Our results also verify the symmetry of the system response and the uniformity of the system resolution.