### Abstract

Three encoding strategies for the measurement of flow velocities in arbitrary directions with phase-contrast magnetic resonance imaging are presented; their noise and dynamic range performance are compared by means of theoretical analysis and computer simulation. A six-point measurement strategy is shown to be quite inefficient in terms of velocity variance per unit time. A simple four-point method exhibits equal dynamic range; its noise depends on flow direction but on average is equal to that of the six-point method. An alternate, balanced four-point method has noise that is direction independent and has, depending on implementation, possibly lower noise levels. Either four-point method is more efficient and is preferred over the six-point approach.

Original language | English (US) |
---|---|

Pages (from-to) | 405-413 |

Number of pages | 9 |

Journal | Journal of magnetic resonance imaging : JMRI |

Volume | 1 |

Issue number | 4 |

State | Published - Jul 1991 |

Externally published | Yes |

### Fingerprint

### ASJC Scopus subject areas

- Radiology Nuclear Medicine and imaging
- Radiological and Ultrasound Technology

### Cite this

*Journal of magnetic resonance imaging : JMRI*,

*1*(4), 405-413.