Tissue relaxation time: in vivo field dependence.

Journal Article (Journal Article)

Relaxation times (T1 and T2) were measured in vivo in mongrel dogs at fields of 0.3, 0.5, 1.0, 1.35, and 1.5 tesla (T). T1 was measured using nine values of inversion time ranging from 10 to 1,280 msec. T2 was measured with a four-point multiple spin-echo sequence. Relaxation times were calculated for muscle, kidney cortex, spleen, and adipose tissue. T2 is independent of field. A linear fit to the field dependence of T1 yields slopes of 400-500 msec/T for tissues in which the primary source of protons is water. The lower slope of adipose (approximately 150 msec/T) reflects the different mechanism of spin-lattice relaxation of the -CH2 protons.

Full Text

Duke Authors

Cited Authors

  • Johnson, GA; Herfkens, RJ; Brown, MA

Published Date

  • September 1985

Published In

Volume / Issue

  • 156 / 3

Start / End Page

  • 805 - 810

PubMed ID

  • 2991980

International Standard Serial Number (ISSN)

  • 0033-8419

Digital Object Identifier (DOI)

  • 10.1148/radiology.156.3.2991980


  • eng

Conference Location

  • United States