Eito Kozawa MD, Presenter: Nothing to Disclose

Waka Saito, Abstract Co-Author: Nothing to Disclose

Makoto Amanuma MD, Abstract Co-Author: Nothing to Disclose

Atsuko Heshiki MD, Abstract Co-Author: Nothing to Disclose

To show diagnostic power of opposed-phase and in-phase MRI with respect to the differentiation of vertebral compression fractures.

Purpose:To apply signal intensity ratio (SIR) of opposed-phase (OP) and in-phase (IP) MR imaging to differentiate vertebral compression fractures.Material and Methods: Ninety patients were examined with 1.5 T MR. OP and IP MRI was obtained with dual gradient echo sequences at 2.3 msec and 4.6 msec. These groups consist of acute compression fracture group (Afx), chronic compression fracture group (Cfx) and pathological compression fracture group (Pfx). Signal intensities of compression fractures involving the vertebral bone marrow were measured quantitatively in OP and IP MRI. SIR (opposed-phase/in-phase) was calculated. The statistical significance of SIR was tested using Tukey-Kramer test in each group (pResults: The mean SIR were 0.78＋/-0.15 (mean +/-SD) for Afx, 0.58+/-0.12 for Cfx and 1.05+/-0.15 for Pfx. The differences of SIR were significant in each groups (p<0.01).Conclusions: OP and IP MRI of vertebra can be helpful predict the cause of compression fractures.

Kozawa, E, Saito, W, Amanuma, M, Heshiki, A, Opposed Phase and In-phase Images: MRI in the Differentiation of Vertebral Compression Fractures.  Radiological Society of North America 2004 Scientific Assembly and Annual Meeting, November 28 - December 3, 2004 ,Chicago IL. http://archive.rsna.org/2004/4410908.html