Keywords:
Musculoskeletal joint, MR, Observer performance
Authors:
T. Robba, A. Gallo, M. Stratta, G. Regis, C. Faletti; Turin/IT
DOI:
10.1594/ecr2013/C-1808
Methods and Materials
In the period February - July 2012 we performed 3D FIESTA (0.6 mm thickness,
0.3 mm spacing,
5'25'') in 40 consecutive patients during arthro-MRI of the hip (at least fs PD FSE in three orthogonal planes and in radial acquisition) (Fig.
1-2).
The MR sequences were acquired after intrarticular injection of 12- 20 ml of contrast-media (Gd-DOTA solution for intrarticular use - gadolinium-tetraazacyclododecanetetraacetic acid).
The Fast Imaging Employing Steady State Acquisition (FIESTA) sequence provides images of fluid filled structures with very short acquisition times.
The FIESTA sequence uses the T2 steady state contrast mechanism to provide high signal to noise ratio images with strong signal from fluid tissues, while suppressing background tissue for contrast and anatomic detail of small structures.
Arthro-MRI FIESTA images were post-processed and 2 mm multiplanar reconstructions with average projection were obtained (Fig.
3-8).
In our work the Czerny classification was semplified and the lesions of the labrum were classified: negative (0),
degenerative lesion without rupture (I),
degenerative lesion with rupture (II),
free edge or fissurative lesion (III),
chondrolabial detachment (IV). Two radiologists blindly reviewed the fs PD FSE images and the FIESTA reconstructions. The interobserver agreement with fs PD FSE and with FIESTA was evaluated with the k-Coen coefficient.