MR data acquisition and reconstruction using efficient sampling schemes

Author

Ehrhardt, James C Ehrhardt

Author_Institution

Dept. of Eng., Iowa Univ., Iowa City, IA, USA

Volume

9

Issue

3

fYear

1990

fDate

9/1/1990 12:00:00 AM

Firstpage

305

Lastpage

309

Abstract

Fast Fourier algorithms are presented for image reconstruction from nonrectangularly sampled data. Since standard display devices require image matrices with rectangular pixels, these algorithms accept nonrectangularly sampled input and calculate output points on a rectangular array. Images are reconstructed with no loss of resolution on a 256×256 square pixel format from 224×256 hexagonally sampled raw data points with no interpolation. The images demonstrate aliasing in a hexagonal pattern around the primary image. This technique can be used to reduce scan time, data throughput, and data-storage requirements while maintaining resolution or to improve resolution while maintaining scan time

Keywords

biomedical NMR; data acquisition; fast Fourier transforms; patient diagnosis; NMR data acquisition; NMR data reconstruction; aliasing; data throughput; efficient sampling schemes; hexagonal pattern; image matrices; image reconstruction; image resolution; nonrectangularly sampled data; scan time; square pixel format; Biomedical imaging; Data acquisition; Discrete Fourier transforms; Displays; Image reconstruction; Image resolution; Image sampling; Interpolation; Magnetic resonance imaging; Sampling methods;

fLanguage

English

Journal_Title

Medical Imaging, IEEE Transactions on

Publisher

ieee

ISSN

0278-0062

Type

jour

DOI

10.1109/42.57768

Filename

57768