Inversion in the steady state: Contrast optimization and reduced imaging time with fast three-dimensional inversion-recovery-prepared GRB pulse sequences

Thomas K F Foo, Anne M. Sawyer, William H. Faulkner, Don G. Mills

Research output: Contribution to journalArticle

Abstract

PURPOSE: To evaluate the differences in contrast between 1-second delay and zero delay (for magnetization recovery) before the preparation radio-frequency pulse in three-dimensional, inversion-recovery (IR) fast gradient-echo (GRE) acquisitions. MATERIALS AND METHODS: Mathematical simulations and measurements of brain image contrast were performed with healthy volunteers and 10 patients. RESULTS: The zero-delay sequence generated T1-weighted contrast similar to that obtained with 1-second delay but was accompanied by a substantial reduction in imaging time. However, the zero delay prohibits full recovery of the longitudinal magnetization. Hence, the signal null characteristic of IR experiments is not easily observed, since it occurs (as a function of tissue T1) at very short inversion times (

Original languageEnglish (US)
Pages (from-to)85-90
Number of pages6
JournalRadiology
Volume191
Issue number1
StatePublished - Apr 1994
Externally publishedYes

Keywords

  • Magnetic resonance (MR), contrast enhancement
  • Magnetic resonance (MR), experimental
  • Magnetic resonance (MR), fat suppression
  • Magnetic resonance (MR), k-space
  • Magnetic resonance (MR), technology

ASJC Scopus subject areas

  • Radiological and Ultrasound Technology

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