Application of the chirp z-transform to MRI data

J Kaffanke; T Dierkes; S Romanzetti; M Halse; J Rioux; M O Leach; B Balcom; N J Shah

doi:10.1016/j.jmr.2005.09.002

Application of the chirp z-transform to MRI data

J Magn Reson. 2006 Jan;178(1):121-8. doi: 10.1016/j.jmr.2005.09.002. Epub 2005 Oct 10.

Authors

J Kaffanke¹, T Dierkes, S Romanzetti, M Halse, J Rioux, M O Leach, B Balcom, N J Shah

Affiliation

¹ Institute of Medicine, Research Centre Jülich, D-52425 Jülich, Germany.

PMID: 16216539
DOI: 10.1016/j.jmr.2005.09.002

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.