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MR IMAGING OF THE KNEE - PRELIMINARY-RESULTS WITH A 3DFT GRASS PULSE SEQUENCE AMERICAN JOURNAL OF ROENTGENOLOGY Spritzer, C. E., Vogler, J. B., Martinez, S., Garrett, W. E., Johnson, G. A., McNamara, M. J., Lohnes, J., Herfkens, R. J. 1988; 150 (3): 597-603


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.

View details for Web of Science ID A1988M239300026

View details for PubMedID 3257617