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

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 journal › Article › peer-review

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 language	English (US)
Pages (from-to)	85-90
Number of pages	6
Journal	Radiology
Volume	191
Issue number	1
State	Published - Apr 1994
Externally published	Yes

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

Cite this

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

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 (",

keywords = "Magnetic resonance (MR), contrast enhancement, Magnetic resonance (MR), experimental, Magnetic resonance (MR), fat suppression, Magnetic resonance (MR), k-space, Magnetic resonance (MR), technology",

author = "Foo, {Thomas K F} and Sawyer, {Anne M.} and Faulkner, {William H.} and Mills, {Don G.}",

year = "1994",

month = apr,

language = "English (US)",

volume = "191",

pages = "85--90",

journal = "Radiology",

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publisher = "Radiological Society of North America Inc.",

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TY - JOUR

T1 - Inversion in the steady state

T2 - Contrast optimization and reduced imaging time with fast three-dimensional inversion-recovery-prepared GRB pulse sequences

AU - Foo, Thomas K F

AU - Sawyer, Anne M.

AU - Faulkner, William H.

AU - Mills, Don G.

PY - 1994/4

Y1 - 1994/4

N2 - 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 (

AB - 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 (

KW - Magnetic resonance (MR), contrast enhancement

KW - Magnetic resonance (MR), experimental

KW - Magnetic resonance (MR), fat suppression

KW - Magnetic resonance (MR), k-space

KW - Magnetic resonance (MR), technology

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M3 - Article

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SN - 0033-8419

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

Abstract

Keywords

ASJC Scopus subject areas

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