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X‐ray micro‐CT with a displaced detector array
Author(s) -
Wang Ge
Publication year - 2002
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 - 10.1118/1.1489043
Subject(s) - imaging phantom , detector , scanner , optics , weighting , x ray detector , physics , beam (structure) , artifact (error) , computer science , computer vision , acoustics
Because the sizes of samples differ in x‐ray micro‐CT applications, it is desirable to have a mechanism to change the field of view of a micro‐CT scanner. A well‐known way to double the diameter of the field of view is to displace a detector array by 50%. In this paper, we propose to displace a detector array by an amount of greater than 0% but less than 50% for a continuously adjustable field of view, and formulate a weighting scheme for artifact‐free reconstruction. Then, we perform numerical simulation with the Shepp–Logan phantom to demonstrate the feasibility in fan‐beam and cone‐beam geometry.