### Abstract

For clinical ^{31}P MR spectroscopic imaging (MRSI) studies, where signal averaging is necessary, some improvement of sensitivity and spatial response function may be achieved by acquiring data over a spherical k-space volume and varying the number of averages acquired in proportion to the desired spatial filter. Eight different k-space sampling schemes are compared through simulations that provide graphs of the spatial response functions (SRF), and tabulations of voxel volumes, relative signal-to-noise ratios (SNR), and relative data collection efficiencies (SNR per unit volume over the same time). All schemes were based on practical experiments, each of which could be implemented in the same length of time. The results show that in comparison with cubic k-space sampling with the same number of signal averages at each point, spherical and acquisition-weighted k-space sampling can be used to achieve reduced Gibbs ringing along the principal axes directions, and thus reduced contamination from adjacent tissue in these directions, without degradation of voxel volume or SNR.

Original language | English |
---|---|

Pages (from-to) | 469-473 |

Number of pages | 5 |

Journal | Magnetic Resonance in Medicine |

Volume | 36 |

Issue number | 3 |

State | Published - Sep 1 1996 |

Externally published | Yes |

### Fingerprint

### Keywords

- chemical shift imaging
- k-space sampling
- spectroscopic imaging

### ASJC Scopus subject areas

- Radiology Nuclear Medicine and imaging
- Radiological and Ultrasound Technology

### Cite this

*Magnetic Resonance in Medicine*,

*36*(3), 469-473.

**Comparison of k-space sampling schemes for multidimensional MR spectroscopic imaging.** / Hugg, James W.; Maudsley, Andrew A; Weiner, Michael W.; Matson, Gerald B.

Research output: Contribution to journal › Article

*Magnetic Resonance in Medicine*, vol. 36, no. 3, pp. 469-473.

}

TY - JOUR

T1 - Comparison of k-space sampling schemes for multidimensional MR spectroscopic imaging

AU - Hugg, James W.

AU - Maudsley, Andrew A

AU - Weiner, Michael W.

AU - Matson, Gerald B.

PY - 1996/9/1

Y1 - 1996/9/1

N2 - For clinical 31P MR spectroscopic imaging (MRSI) studies, where signal averaging is necessary, some improvement of sensitivity and spatial response function may be achieved by acquiring data over a spherical k-space volume and varying the number of averages acquired in proportion to the desired spatial filter. Eight different k-space sampling schemes are compared through simulations that provide graphs of the spatial response functions (SRF), and tabulations of voxel volumes, relative signal-to-noise ratios (SNR), and relative data collection efficiencies (SNR per unit volume over the same time). All schemes were based on practical experiments, each of which could be implemented in the same length of time. The results show that in comparison with cubic k-space sampling with the same number of signal averages at each point, spherical and acquisition-weighted k-space sampling can be used to achieve reduced Gibbs ringing along the principal axes directions, and thus reduced contamination from adjacent tissue in these directions, without degradation of voxel volume or SNR.

AB - For clinical 31P MR spectroscopic imaging (MRSI) studies, where signal averaging is necessary, some improvement of sensitivity and spatial response function may be achieved by acquiring data over a spherical k-space volume and varying the number of averages acquired in proportion to the desired spatial filter. Eight different k-space sampling schemes are compared through simulations that provide graphs of the spatial response functions (SRF), and tabulations of voxel volumes, relative signal-to-noise ratios (SNR), and relative data collection efficiencies (SNR per unit volume over the same time). All schemes were based on practical experiments, each of which could be implemented in the same length of time. The results show that in comparison with cubic k-space sampling with the same number of signal averages at each point, spherical and acquisition-weighted k-space sampling can be used to achieve reduced Gibbs ringing along the principal axes directions, and thus reduced contamination from adjacent tissue in these directions, without degradation of voxel volume or SNR.

KW - chemical shift imaging

KW - k-space sampling

KW - spectroscopic imaging

UR - http://www.scopus.com/inward/record.url?scp=0029737824&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0029737824&partnerID=8YFLogxK

M3 - Article

C2 - 8875420

AN - SCOPUS:0029737824

VL - 36

SP - 469

EP - 473

JO - Magnetic Resonance in Medicine

JF - Magnetic Resonance in Medicine

SN - 0740-3194

IS - 3

ER -