Aims and objectives
The evaluation of acetabular labral injuries and femoroacetabular impingement (FAI) is difficult using standard 2D MRI sequences.
Although radial 2D MRI is useful for evaluating acetabular labral injury ,
slice acquisition is limited within reasonable scan times.
Advantages of 3D isotropic acquisitions of MRI include a high signal-to-noise ratio (SNR),
high spatial resolution,
and the ability to yield high-quality multiplanar reconstruction (MPR) images [2,
The aim of this study was to evaluate the utility of two radial reformations of 3D fat-suppressed multi-echo gradient-recalled-echo (FS...
Methods and materials
Our study was approved by our institutional review board.
Informed consent was obtained from each patient.
We recruited 25 patients (11 men,
14 women; mean age,
45±16 years) with suspected acetabular labral injury.
All images were obtained on a 3T MR unit (Philips INGENIA 3.0T; gradient strength = 40 mT/m,
slew rate = 150 T/m/s) using ds Anterior and ds Posterior coil.
We optimized the 3D FS multi-echo GRE sequence (TR 32 ms,
TE 2.3/5.6/8.9/12.2/15.5 ms (5 echoes),
flip angle 7°,
The results in details of our study was shown in Table.
We identified labral injuries in 23 patients and no labral injury in 2 patients from type-1 radial reformation and radial 2D T2*WI.
We found 50 zones with labral injury in all patients (anterosuperior zone,
n=17; anterior zone,
n=8; superior zone,
n=7; posterior zone,
n=3; posteroinferior zone,
The rate of diagnostic concordance concerning the range of labral injury was 80.0%.
FAI could be evaluated in all patients (no FAI,
Type-1 radial reformation of 3D FS multi-echo GRE imaging is useful for evaluating the range of acetabular labral injury and provides complementary information to radial 2D T2*WI.
Type-2 radial reformation enables us to determine whether patients with labral injury have FAI,
Potential disadvantages of 3D isotropic GRE imaging include relatively long acquisition times and inherent sensitivity to susceptibility artifacts,
which may be problematic in emergency and postoperative patients.
The most weakness of this study was the lack comparison with findings from MRI and...
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