title: Application of the chirp z-transform to MRI data.
abstract: 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 T2* 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.
authors.affiliation: Institute of Medicine, Research Centre Jülich, D-52425 Jülich, Germany.
authors.forename: J
authors.initials: J
authors.lastname: Kaffanke
authors.forename: T
authors.initials: T
authors.lastname: Dierkes
authors.forename: S
authors.initials: S
authors.lastname: Romanzetti
authors.forename: M
authors.initials: M
authors.lastname: Halse
authors.forename: J
authors.initials: J
authors.lastname: Rioux
authors.forename: M O
authors.initials: MO
authors.lastname: Leach
authors.forename: B
authors.initials: B
authors.lastname: Balcom
authors.forename: N J
authors.initials: NJ
authors.lastname: Shah