Quantification of Fatty Degeneration Within the Supraspinatus Muscle by Using a 2-Point Dixon Method on 3-T MRI

Abstract

An increase in supraspinatus fatty degeneration was statistically significantly correlated with severity of supraspinatus tears and moderately correlated with muscular atrophy. Fatty degeneration tends to progress more rapidly than muscular atrophy in female patients, with statistically significant sex differences.

A semi-automated quantitative CT method for measuring rotator cuff muscle degeneration in shoulders with primary osteoarthritis

“…Consequently, several simplified versions or quantitative (i.e. objective) adaptations of Goutallier grading system have successively been proposed [8,15,16,[18][19][20][21]. Of particular interest is the study by van de Sande et al, who described producible CT method to quantify fatty infiltration of rotator cuff muscles.…”

“…However, the parasagittal reconstruction plane was adjusted manually, thereby representing a source of error, and the authors only measured the mean muscle density rather than quantifying muscle atrophy and fatty infiltration separately [21]. Further quantitative methods using MRI fat-water separation techniques have recently been reported [18,19,22]. Fat fraction values in rotator cuff muscles were found to be reliable and correlated well with shoulder pain and range of motion [22], the severity of SS tendon tears [18], and the occupational ratios [19].…”

“…Further quantitative methods using MRI fat-water separation techniques have recently been reported [18,19,22]. Fat fraction values in rotator cuff muscles were found to be reliable and correlated well with shoulder pain and range of motion [22], the severity of SS tendon tears [18], and the occupational ratios [19]. Although very interesting and preferred in patients with rotator cuff tendon tears, these quantitative MRI methods are limited in patients planned for shoulder arthroplasty because CT allows more accurate analysis of glenoid version, scapulohumeral subluxation, and particularly glenoid bone mineral density.…”

Classifications in Brief: Goutallier Classification of Fatty Infiltration of the Rotator Cuff Musculature

“…Despite attempts to standardize the grading system, there is lack of quantitative data in the classification of Goutallier et al Recent efforts to more precisely quantify the amount of fatty infiltration have shown improved reliability with measurement of Hounsfield units on CT images [19] and T2-sequence mapping [23] or two-point Dixon sequence measurements [26] for MRI scans. In addition, the relatively wide range of five stages has been cited as a potential reason for low reliability [32] and has resulted in simplified three-stage classifications.…”

Imagerie et spectroscopie par résonance magnétique nucléaire du muscle strié squelettique

“…Le suivi à un an de patients atteints de la maladie de Charcot-Marie-Tooth 1A a montré un accroissement significatif de la fraction graisseuse au niveau du mollet (1.2 %) mais pas au niveau de la cuisse (0.2 %) alors que chez les patients souffrant de myosite à inclusions la progression était de 2.6 % au niveau des mollets et de 3.3 % au niveau des cuisses (Morrow et al 2015). Chez les patients qui présentent des lésions de la coiffe des rotateurs, l'évaluation quantitative des changements dégénératifs graisseux a montré, plus que l'atrophie musculaire des muscles impliqués, une forte relation avec l'étendue des déchi-rures musculaires (Nardo et al 2014 ;Nozaki et al 2015). Semblables observations ont également été faites dans des pathologies qui affectent secondairement le muscle strié squelettique.…”