Computer simulation study of Siemens star x‐ray image artifacts | Zendy

Amtey Sharad R. | Zendy; Tyson Robert K. | Zendy

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Computer simulation study of Siemens star x‐ray image artifacts

Author(s) -

Amtey Sharad R.,

Tyson Robert K.

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 - 10.1118/1.594352

Subject(s) - siemens , star (game theory) , optics , physics , image (mathematics) , digital image , contrast (vision) , modulation (music) , computer science , optical transfer function , image processing , artificial intelligence , computer vision , acoustics , quantum mechanics , astrophysics

In the Siemens star image, exact determination of the first disappearance frequency, which is used to measure the focal spot size, is difficult since the disappearance band has a finite width and the image also has other artifacts. The origin of these artifacts and their appearance was studied by Siemens star image simulation on a digital computer. The simulated images were manipulated by using many different modulation and phase transfer functions. It is shown that the bending of spokes is not related to zero contrast; exact triplet splitting can occur only at the disappearance frequency, and therefore splitting is a valuable indicator of that frequency.

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