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MR microimaging of the lung using volume projection encoding.

Publication ,  Journal Article
Shattuck, MD; Gewalt, SL; Glover, GH; Hedlund, LW; Johnson, GA
Published in: Magn Reson Med
December 1997

Radial acquisition (RA) techniques have been extended to produce isotropic, three-dimensional images of lung in live laboratory animals at spatial resolution down to 0.013 mm3 with a signal-to-noise ratio of 30:1. The pulse sequence and reconstruction algorithm have been adapted to allow acquisition of image matrices of up to 256(3) in less than 15 min. Scan-synchronous ventilation has been incorporated to limit breathing motion artifacts. The imaging sequence permits randomizing and/or discarding selected views to minimize the consequences of breathing motion. The signal in lung parenchyma was measured as a function of flip angle (alpha) for different repetition times and found to follow the predictions for which there is an optimum excitation (Ernst) angle. A single T1 relaxation value of 780 +/- 54 ms fits all data from six guinea pigs at 2.0 T. This T1 value parameterizes the signal and allows for a priori optimization, such as calculation of the Ernst angle appropriate for lung imaging.

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Published In

Magn Reson Med

DOI

ISSN

0740-3194

Publication Date

December 1997

Volume

38

Issue

6

Start / End Page

938 / 942

Location

United States

Related Subject Headings

  • Nuclear Medicine & Medical Imaging
  • Magnetic Resonance Imaging
  • Lung
  • Guinea Pigs
  • Animals
  • 4003 Biomedical engineering
  • 0903 Biomedical Engineering
 

Citation

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Shattuck, M. D., Gewalt, S. L., Glover, G. H., Hedlund, L. W., & Johnson, G. A. (1997). MR microimaging of the lung using volume projection encoding. Magn Reson Med, 38(6), 938–942. https://doi.org/10.1002/mrm.1910380613
Shattuck, M. D., S. L. Gewalt, G. H. Glover, L. W. Hedlund, and G. A. Johnson. “MR microimaging of the lung using volume projection encoding.Magn Reson Med 38, no. 6 (December 1997): 938–42. https://doi.org/10.1002/mrm.1910380613.
Shattuck MD, Gewalt SL, Glover GH, Hedlund LW, Johnson GA. MR microimaging of the lung using volume projection encoding. Magn Reson Med. 1997 Dec;38(6):938–42.
Shattuck, M. D., et al. “MR microimaging of the lung using volume projection encoding.Magn Reson Med, vol. 38, no. 6, Dec. 1997, pp. 938–42. Pubmed, doi:10.1002/mrm.1910380613.
Shattuck MD, Gewalt SL, Glover GH, Hedlund LW, Johnson GA. MR microimaging of the lung using volume projection encoding. Magn Reson Med. 1997 Dec;38(6):938–942.
Journal cover image

Published In

Magn Reson Med

DOI

ISSN

0740-3194

Publication Date

December 1997

Volume

38

Issue

6

Start / End Page

938 / 942

Location

United States

Related Subject Headings

  • Nuclear Medicine & Medical Imaging
  • Magnetic Resonance Imaging
  • Lung
  • Guinea Pigs
  • Animals
  • 4003 Biomedical engineering
  • 0903 Biomedical Engineering