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Selection of a convolution function for Fourier inversion using gridding [computerised tomography application]

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4 Author(s)
Jackson, J.I. ; Magnetic Resonance Syst. Res. Lab., Stanford Univ., CA, USA ; Meyer, C.H. ; Nishimura, D.G. ; Macovski, A.

In the technique known as gridding, the data samples are weighted for sampling density and convolved with a finite kernel, then resampled on a grid preparatory to a fast Fourier transform. The authors compare the artifact introduced into the image for various convolving functions of different sizes, including the Kaiser-Bessel window and the zero-order prolate spheroidal wave function (PSWF). They also show a convolving function that improves upon the PSWF in some circumstances

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Medical Imaging, IEEE Transactions on  (Volume:10 ,  Issue: 3 )