Application of the chirp z-transform to MRI data

A version of the chirp z-transform (CZT) enabling signal intensity and phase-preserving field-of-view scaling has been programmed. The algorithm is important for all single-point imaging sequences such as SPRITE when used with multiple data acquisition for T 2 ∗ mapping or signal averaging. CZT has...

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Bibliographic Details
Published inJournal of magnetic resonance (1997) Vol. 178; no. 1; pp. 121 - 128
Main Authors Kaffanke, J., Dierkes, T., Romanzetti, S., Halse, M., Rioux, J., Leach, M.O., Balcom, B., Shah, N.J.
Format Journal Article
LanguageEnglish
Published United States Elsevier Inc 2006
Subjects
Chirp z-transform
FOV scaling
Interpolation
MRI
Multiple point acquisition
Single point imaging
SPI
SPRITE
Interpolation
Multiple point acquisition
MRI
Single point imaging
SPRITE
SPI
Chirp z-transform
FOV scaling
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Summary:A version of the chirp z-transform (CZT) enabling signal intensity and phase-preserving field-of-view scaling has been programmed. The algorithm is important for all single-point imaging sequences such as SPRITE when used with multiple data acquisition for T 2 ∗ mapping or signal averaging. CZT has particular utility for SPRITE imaging of nuclei with short relaxation times such as sodium at high field. Here, a complete theory of the properties of CZT is given. This method operates entirely in k-space. It is compared with a conventional interpolation approach that works in image space after the application of a fast Fourier transformation.
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ISSN:1090-7807
1096-0856
DOI:10.1016/j.jmr.2005.09.002