Short tau inversion recovery and three-point Dixon water-fat separation sequences in acute traumatic bone fractures at open 0.35 tesla MRI.

Autor: Wohlgemuth WA; Department of Radiology, Klinikum Augsburg, Stenglinstrasse 2, Germany. w.wohlgemuth@online.de, Roemer FW, Bohndorf K
Jazyk: angličtina
Zdroj: Skeletal radiology [Skeletal Radiol] 2002 Jun; Vol. 31 (6), pp. 343-8. Date of Electronic Publication: 2002 Apr 25.
DOI: 10.1007/s00256-002-0517-9
Abstrakt: Objective: Fat suppression can be used to improve the diagnostic confidence in traumatic bone fractures of the extremities. We compared a three-point Dixon "sandwich" water-fat separation (WFS) sequence, resulting in a water-only and a fat-only image set after one excitation, with the STIR sequence on an open 0.35 T superconductive MR system.
Design and Patients: T1-weighted, STIR (2000/40 [TR/TE]), and WFS (2000/36 [TR/TE]) MR images were prospectively obtained in 27 patients with 40 radiologically diagnosed fractures immediately after first-line treatment. Signal-to-noise (S/N) ratio, contrast-to-noise (C/N) ratio, and bone marrow edema volumes were measured together with qualitative parameters (four-point scale).
Results: WFS was significantly superior to STIR in all quantitative parameters (better S/N ratio, P<0.001; better C/N ratio, P<0.001; larger marrow edema, P <0.023; Wilcoxon signed rank test). Visibility of bone marrow edema, visibility of fracture line, and preservation of anatomical details were better with the WFS sequence ( P<0.001, P<0.001, P<0.001, respectively; ANOVA). Fat saturation was rated more homogeneous, however, with the STIR sequence (not significant; P<0.101).
Conclusion: On the basis of qualitative and quantitative assessments, the three-point Dixon "sandwich" water-fat separation sequence was consistently superior to the STIR sequence in the delineation of traumatic fractures.
Databáze: MEDLINE
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