Rapid Rotating-Frame Imaging Using an RF Pulse Train (RIPT)

Kenneth R. Metz, John Boehmer, John L. Bowers, James R. Moore

Research output: Contribution to journalArticle

22 Citations (Scopus)

Abstract

The rotating-frame imaging (RFI) method has proven useful for measuring the spatial distributions of NMR-visible nuclides without the aid of static magnetic field gradients. However, traditional RFI has several disadvantages, including relatively poor time efficiency and high RF power deposition in the sample. A B1-gradient imaging technique, rapid rotating-frame imaging using an RF pulse train (RIPT), is discussed which can reduce both the image data-acquisition time and the RF power deposition by several orders of magnitude compared to RFI. The method is most readily applied to samples having only one resonance line, but a chemical-shift-selective version is also described which permits imaging of arbitrary lines in multipeak spectra. It is shown that RIPT images can be produced even when sample relaxation times are only a few milliseconds. Furthermore, by adding a suitable preparation period to the sequence, the RIPT signal intensity can be weighted by the relaxation time constant. Finally, postprocessing techniques are described which correct some of the image distortions common to most B1-gradient imaging techniques.

Original languageEnglish (US)
Pages (from-to)152-161
Number of pages10
JournalJournal of Magnetic Resonance, Series B
Volume103
Issue number2
DOIs
StatePublished - Jan 1 1994

Fingerprint

Imaging techniques
Relaxation time
Chemical shift
Spatial distribution
Isotopes
Data acquisition
Nuclear magnetic resonance
Magnetic fields

All Science Journal Classification (ASJC) codes

  • Engineering(all)

Cite this

Metz, Kenneth R. ; Boehmer, John ; Bowers, John L. ; Moore, James R. / Rapid Rotating-Frame Imaging Using an RF Pulse Train (RIPT). In: Journal of Magnetic Resonance, Series B. 1994 ; Vol. 103, No. 2. pp. 152-161.
@article{f99c171b77114319b9e1d6f42bbe7aa1,
title = "Rapid Rotating-Frame Imaging Using an RF Pulse Train (RIPT)",
abstract = "The rotating-frame imaging (RFI) method has proven useful for measuring the spatial distributions of NMR-visible nuclides without the aid of static magnetic field gradients. However, traditional RFI has several disadvantages, including relatively poor time efficiency and high RF power deposition in the sample. A B1-gradient imaging technique, rapid rotating-frame imaging using an RF pulse train (RIPT), is discussed which can reduce both the image data-acquisition time and the RF power deposition by several orders of magnitude compared to RFI. The method is most readily applied to samples having only one resonance line, but a chemical-shift-selective version is also described which permits imaging of arbitrary lines in multipeak spectra. It is shown that RIPT images can be produced even when sample relaxation times are only a few milliseconds. Furthermore, by adding a suitable preparation period to the sequence, the RIPT signal intensity can be weighted by the relaxation time constant. Finally, postprocessing techniques are described which correct some of the image distortions common to most B1-gradient imaging techniques.",
author = "Metz, {Kenneth R.} and John Boehmer and Bowers, {John L.} and Moore, {James R.}",
year = "1994",
month = "1",
day = "1",
doi = "10.1006/jmrb.1994.1023",
language = "English (US)",
volume = "103",
pages = "152--161",
journal = "Journal of Magnetic Resonance - Series B",
issn = "1064-1866",
publisher = "Academic Press Inc.",
number = "2",

}

Rapid Rotating-Frame Imaging Using an RF Pulse Train (RIPT). / Metz, Kenneth R.; Boehmer, John; Bowers, John L.; Moore, James R.

In: Journal of Magnetic Resonance, Series B, Vol. 103, No. 2, 01.01.1994, p. 152-161.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Rapid Rotating-Frame Imaging Using an RF Pulse Train (RIPT)

AU - Metz, Kenneth R.

AU - Boehmer, John

AU - Bowers, John L.

AU - Moore, James R.

PY - 1994/1/1

Y1 - 1994/1/1

N2 - The rotating-frame imaging (RFI) method has proven useful for measuring the spatial distributions of NMR-visible nuclides without the aid of static magnetic field gradients. However, traditional RFI has several disadvantages, including relatively poor time efficiency and high RF power deposition in the sample. A B1-gradient imaging technique, rapid rotating-frame imaging using an RF pulse train (RIPT), is discussed which can reduce both the image data-acquisition time and the RF power deposition by several orders of magnitude compared to RFI. The method is most readily applied to samples having only one resonance line, but a chemical-shift-selective version is also described which permits imaging of arbitrary lines in multipeak spectra. It is shown that RIPT images can be produced even when sample relaxation times are only a few milliseconds. Furthermore, by adding a suitable preparation period to the sequence, the RIPT signal intensity can be weighted by the relaxation time constant. Finally, postprocessing techniques are described which correct some of the image distortions common to most B1-gradient imaging techniques.

AB - The rotating-frame imaging (RFI) method has proven useful for measuring the spatial distributions of NMR-visible nuclides without the aid of static magnetic field gradients. However, traditional RFI has several disadvantages, including relatively poor time efficiency and high RF power deposition in the sample. A B1-gradient imaging technique, rapid rotating-frame imaging using an RF pulse train (RIPT), is discussed which can reduce both the image data-acquisition time and the RF power deposition by several orders of magnitude compared to RFI. The method is most readily applied to samples having only one resonance line, but a chemical-shift-selective version is also described which permits imaging of arbitrary lines in multipeak spectra. It is shown that RIPT images can be produced even when sample relaxation times are only a few milliseconds. Furthermore, by adding a suitable preparation period to the sequence, the RIPT signal intensity can be weighted by the relaxation time constant. Finally, postprocessing techniques are described which correct some of the image distortions common to most B1-gradient imaging techniques.

UR - http://www.scopus.com/inward/record.url?scp=0003121013&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0003121013&partnerID=8YFLogxK

U2 - 10.1006/jmrb.1994.1023

DO - 10.1006/jmrb.1994.1023

M3 - Article

AN - SCOPUS:0003121013

VL - 103

SP - 152

EP - 161

JO - Journal of Magnetic Resonance - Series B

JF - Journal of Magnetic Resonance - Series B

SN - 1064-1866

IS - 2

ER -