A Pilot Study to Assess Fatty Infiltration of the Supraspinatus in Patients with Rotator Cuff Tears: Comparison with Magnetic Resonance Imaging

Tsuneo Watanabe, Nobuo Terabayashi, Daisuke Fukuoka, Hiroki Murakami, Hiroyasu Ito, Toshio Matsuoka, Mitsuru Seishima

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)

Abstract

The aim of this study was to quantitatively assess the echo intensity of the supraspinatus muscle and compare magnetic resonance imaging and ultrasound findings for 27 patients (12 women, 15 men, 65.8 ± 11.5 y). Tear size and fatty infiltration were determined by magnetic resonance imaging; five stages were assigned based on Goutallier's classification. Gray-scale histogram analysis was used for ultrasound assessment, which was performed in both subcutaneous fat and supraspinatus muscle in three different regions; the echo intensity ratio was the ratio of echo intensity in subcutaneous fat to that in the supraspinatus muscle. Sonograms of 27 shoulders revealed 3 shoulders with a partial tear, and 4 with a small tear, 6 with a medium tear, 6 with a large tear and 4 with a massive tear; 4 shoulders had no tear. Supraspinatus muscle echo intensity and echo intensity ratio were significantly lower in the stage 0 and 1 than in stages 2-4. Our study suggests that ultrasound can quantitatively and objectively assess fatty infiltration in the rotator cuff muscle.

Original languageEnglish
Pages (from-to)1779-1783
Number of pages5
JournalUltrasound in Medicine and Biology
Volume41
Issue number6
DOIs
Publication statusPublished - 01-06-2015
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Radiological and Ultrasound Technology
  • Biophysics
  • Acoustics and Ultrasonics

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