Double-DANTE tagging sequence for the evaluation of heart wall motion

Timothy Mosher, Michael B. Smith

Research output: Contribution to conferencePaper

Abstract

A magnetic resonance imaging sequence that generates a high-density grid pattern of tags is discussed. This sequence is similar to the spatial modulation of magnetization (SPAMM) technique described by L. Axel and L. Dougherty (1989), which utilizes binomial RF pulses interspersed with pulsed gradients. In the sequence described, the tag placement occurs by exciting the sample with a DANTE pulse sequence in the presence of a continuous frequency encoding gradient. This results in a set of thin parallel lines whose separation can be controlled by varying either the Dante delay or the gradient strength. The tagging sequence requires less than 10 ms to define a cross-sectional grid. By alternating the phase of the DANTE pulses between 0° and 180°, excitation occurs at four different frequencies, thereby quadrupling the number of tags. The use of a DANTE pulse train provides better frequency selectivity and reduces the bandwidth limitation of the longer binomial pulses. This results in thinner, more uniform tag placement in less time.

Original languageEnglish (US)
Number of pages1
StatePublished - Jan 1 1990
EventProceedings of the Sixteenth Annual Northeast Bioengineering Conference - University Park, PA, USA
Duration: Mar 26 1990Mar 27 1990

Other

OtherProceedings of the Sixteenth Annual Northeast Bioengineering Conference
CityUniversity Park, PA, USA
Period3/26/903/27/90

Fingerprint

Magnetic resonance
Magnetization
Modulation
Bandwidth
Imaging techniques

All Science Journal Classification (ASJC) codes

  • Bioengineering

Cite this

Mosher, T., & Smith, M. B. (1990). Double-DANTE tagging sequence for the evaluation of heart wall motion. Paper presented at Proceedings of the Sixteenth Annual Northeast Bioengineering Conference, University Park, PA, USA, .
Mosher, Timothy ; Smith, Michael B. / Double-DANTE tagging sequence for the evaluation of heart wall motion. Paper presented at Proceedings of the Sixteenth Annual Northeast Bioengineering Conference, University Park, PA, USA, .1 p.
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Mosher, T & Smith, MB 1990, 'Double-DANTE tagging sequence for the evaluation of heart wall motion' Paper presented at Proceedings of the Sixteenth Annual Northeast Bioengineering Conference, University Park, PA, USA, 3/26/90 - 3/27/90, .

Double-DANTE tagging sequence for the evaluation of heart wall motion. / Mosher, Timothy; Smith, Michael B.

1990. Paper presented at Proceedings of the Sixteenth Annual Northeast Bioengineering Conference, University Park, PA, USA, .

Research output: Contribution to conferencePaper

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AU - Mosher, Timothy

AU - Smith, Michael B.

PY - 1990/1/1

Y1 - 1990/1/1

N2 - A magnetic resonance imaging sequence that generates a high-density grid pattern of tags is discussed. This sequence is similar to the spatial modulation of magnetization (SPAMM) technique described by L. Axel and L. Dougherty (1989), which utilizes binomial RF pulses interspersed with pulsed gradients. In the sequence described, the tag placement occurs by exciting the sample with a DANTE pulse sequence in the presence of a continuous frequency encoding gradient. This results in a set of thin parallel lines whose separation can be controlled by varying either the Dante delay or the gradient strength. The tagging sequence requires less than 10 ms to define a cross-sectional grid. By alternating the phase of the DANTE pulses between 0° and 180°, excitation occurs at four different frequencies, thereby quadrupling the number of tags. The use of a DANTE pulse train provides better frequency selectivity and reduces the bandwidth limitation of the longer binomial pulses. This results in thinner, more uniform tag placement in less time.

AB - A magnetic resonance imaging sequence that generates a high-density grid pattern of tags is discussed. This sequence is similar to the spatial modulation of magnetization (SPAMM) technique described by L. Axel and L. Dougherty (1989), which utilizes binomial RF pulses interspersed with pulsed gradients. In the sequence described, the tag placement occurs by exciting the sample with a DANTE pulse sequence in the presence of a continuous frequency encoding gradient. This results in a set of thin parallel lines whose separation can be controlled by varying either the Dante delay or the gradient strength. The tagging sequence requires less than 10 ms to define a cross-sectional grid. By alternating the phase of the DANTE pulses between 0° and 180°, excitation occurs at four different frequencies, thereby quadrupling the number of tags. The use of a DANTE pulse train provides better frequency selectivity and reduces the bandwidth limitation of the longer binomial pulses. This results in thinner, more uniform tag placement in less time.

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Mosher T, Smith MB. Double-DANTE tagging sequence for the evaluation of heart wall motion. 1990. Paper presented at Proceedings of the Sixteenth Annual Northeast Bioengineering Conference, University Park, PA, USA, .