利用脂肪饱和快速自旋回波质子密度磁共振成像评估骨挫伤

Evaluation of bone contusions with fat-saturated fast spin-echo proton-density magnetic resonance imaging.

作者信息

Lal N R, Jamadar D A, Doi K, Newman J S, Adler R S, Uri D S, Kazerooni E A

机构信息

Department of Radiology, University of Michigan Medical Center, Ann Arbor, USA.

出版信息

Can Assoc Radiol J. 2000 Jun;51(3):182-5.

PMID:10914084

Abstract

OBJECTIVE

To evaluate the efficacy of fast spin-echo proton-density magnetic resonance imaging (MRI) with fat saturation sequences in the evaluation of bone contusions at the knee.

METHODS

Analysis of 46 consecutive knee MRI examinations performed on patients referred from a sports medicine clinic after knee trauma. All examinations included coronal fast spin-echo proton-density fat saturation, fast spin-echo proton-density and fast spin-echo T2-weighted sequences. All 3 coronal sequences were blindly reviewed independently of each other by 3 experienced musculoskeletal radiologists to identify and grade bone contusions.

RESULTS

Thirty-five bone contusions were identified in 24 patients. All bone contusions were identified on fast spin-echo proton-density fat saturation sequences, which was significantly greater than the percentage identified on either fast spin-echo T2-weighted sequences (21/35, 60%, p < 0.001) or fast spin-echo proton-density sequences (10/35, 29%, p < 0.001). Fourteen (40%) of the contusions were identified only on the fast spin-echo proton-density fat saturation sequences. The average grade of contusion for all 35 examinations was also significantly higher on the fast spin-echo proton-density fat saturation sequences than on the fast spin-echo proton-density and fast spin-echo T2-weighted sequences (p < 0.05).

CONCLUSION

Fast spin-echo proton-density fat saturation sequences are more sensitive in the detection of bone contusions than fast spin-echo proton-density and fast spin-echo T2-weighted sequences. Assessment of other structures in the knee with fast spin-echo proton-density fat saturation MRI provides good spatial resolution and adequate T2-weighted information. It may have advantages over the more heavily T2-weighted fast spin-echo T2 fat saturation and inversion recovery sequences.

摘要

目的

评估采用脂肪抑制序列的快速自旋回波质子密度磁共振成像（MRI）在评估膝关节骨挫伤中的疗效。

方法

对46例因膝关节创伤从运动医学诊所转诊而来的患者进行的连续膝关节MRI检查进行分析。所有检查均包括冠状位快速自旋回波质子密度脂肪抑制序列、快速自旋回波质子密度序列和快速自旋回波T2加权序列。3位经验丰富的肌肉骨骼放射科医生相互独立地对所有3个冠状位序列进行盲法评估，以识别和分级骨挫伤。

结果

24例患者中发现35处骨挫伤。所有骨挫伤均在快速自旋回波质子密度脂肪抑制序列上被识别，这一比例显著高于在快速自旋回波T2加权序列（21/35，60%，p<0.001）或快速自旋回波质子密度序列（10/35，29%，p<0.001）上被识别的比例。14处（40%）挫伤仅在快速自旋回波质子密度脂肪抑制序列上被识别。在所有35次检查中，快速自旋回波质子密度脂肪抑制序列上挫伤的平均分级也显著高于快速自旋回波质子密度序列和快速自旋回波T2加权序列（p<0.05）。