Contrast and accuracy of relaxation time measurements in acquired and synthesized multislice magnetic resonance images.


Journal Article

The effects of interslice spacing, the number of data points and other factors on the accuracy of relaxation time measurements and contrast have been investigated for both acquired and synthesized multislice MR images using experiments and computer simulations. The cross-excitation between adjacent slices in multislice imaging affects both contrast and derived relaxation times. Such measurements also are affected by the T1 and T2 of the materials imaged, the pulse sequence timing parameters, and the number of data points used to estimate the relaxation times. Errors in T1 and T2 may be severe, particularly for slice spacings less than 0.5 slice thickness and for long T1 and T2 materials. Consequently, the difference in signal intensities between two materials with different relaxation times also varies with slice spacing and between acquired and synthetic images, particularly for strongly T1-weighed images.

Full Text

Cited Authors

  • Majumdar, S; Sostman, HD; MacFall, JR

Published Date

  • February 1989

Published In

Volume / Issue

  • 24 / 2

Start / End Page

  • 119 - 127

PubMed ID

  • 2917832

Pubmed Central ID

  • 2917832

Electronic International Standard Serial Number (EISSN)

  • 1536-0210

International Standard Serial Number (ISSN)

  • 0020-9996

Digital Object Identifier (DOI)

  • 10.1097/00004424-198902000-00007


  • eng