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

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.

Os acromiale: evaluation of markers for identification on sagittal and coronal oblique MR images.

An os acromiale is a developmental abnormality of ossification involving the anterior acromion which may contribute to impingement and rotator cuff disease. When axial MR sections do not include the acromioclavicular joint, the diagnosis of this often subtle abnormality will rest on its recognition on oblique and coronal and sagittal images where it mimics the acromioclavicular joint. The identification of this anomaly is important as it frequently alters the type of surgical procedure utilized in symptomatic patients.

MR imaging of shoulder impingement and rotator cuff disease.

A number of imaging modalities, such as conventional radiography, arthrography, ultrasonography, and MR imaging, can be used in the evaluation of shoulder pain related to impingement, tendinosis, and rotator cuff tear. Of these techniques, only MR imaging provides anatomic information coupled with superior soft-tissue contrast. MR imaging of the shoulder effectively demonstrates a variety of morphologic abnormalities that may be associated with tendon degeneration.

Muscle impingement: MR imaging of a painful complication of osteochondromas.

The purpose of this study was to describe the magnetic resonance (MR) appearance of a newly recognized complication of osteochondromas. Two patients presented with pain and swelling over known osteochondromas. Plain radiographic studies were unrevealing.