MR imaging of the knee: preliminary results with a 3DFT GRASS pulse sequence.

Journal Article

The knees of 17 patients (18 extremities) with possible meniscal, cruciate ligament, and articular cartilage abnormalities were examined with a three-dimensional Fourier transform (3DFT), gradient-refocused acquisition in a steady state (GRASS) pulse sequence. Arthroscopic confirmation was available in all cases and was the standard for comparison. Thirteen of these extremities were also examined by using a two-dimensional Fourier transform spin-echo pulse sequence with a 2000-msec repetition time and 20- and 80-msec echo time. In these 13 cases, both pulse sequences correctly identified seven of eight meniscal abnormalities. However, interpretation of the 3DFT GRASS images resulted in fewer false-positive meniscal tears (three vs six). Cruciate ligament tears were detected more readily on the 3DFT GRASS images (six vs three with two possible tears on the spin-echo images). These preliminary findings suggest that the overall accuracy of MR imaging of the knee could be improved by including 3DFT gradient-refocused pulse sequences.

Full Text

Duke Authors

Cited Authors

  • Spritzer, CE; Vogler, JB; Martinez, S; Garrett, WE; Johnson, GA; McNamara, MJ; Lohnes, J; Herfkens, RJ

Published Date

  • March 1988

Published In

Volume / Issue

  • 150 / 3

Start / End Page

  • 597 - 603

PubMed ID

  • 3257617

International Standard Serial Number (ISSN)

  • 0361-803X

Digital Object Identifier (DOI)

  • 10.2214/ajr.150.3.597

Language

  • eng

Conference Location

  • United States