MR arthrography in the diagnosis of rotator cuff tears. Standard spin-echo alone or with fat suppression?
OBJECTIVE
To examine the value of fat-suppressed images in MR arthrography of the shoulder in patients with rotator cuff tears.


METHODS
MR arthrography was performed in 25 patients (9 women, 16 men) ranging from 19 to 64 years. Standard T1-weighted spin-echo images (sSE) and fat-suppressed images (FS) were obtained after intraarticular injection of contrast material. The MR studies were analyzed according to contrast, image quality and conspicuity of pathology. A diagnosis was established without knowledge of the conventional arthrographic findings on the basis of sSE versus FS techniques.


RESULTS
The contrast between the intraarticular fluid and the adjacent structures in FS images was increased compared to sSE images in all patients. The conspicuity of anatomical structures was improved in 8 patients. Without fat suppression, 2 false-negative and one false-positive full-thickness tears were diagnosed. With the FS technique, 14 full-thickness tears and 4 partial-thickness tears of the cuff were correctly classified.


CONCLUSIONS
The results suggest that, if MR arthrography is chosen for a diagnosis of rotator cuff disorders, a fat suppression sequence should be included.
Department of Radiology 1, University Hospital, Göttingen, Germany.
M
M
Funke
L
L
Kopka
R
R
Vosshenrich
J W
JW
Oestmann
E
E
Grabbe
D000328:Adult; D003287:Contrast Media; D004338:Drug Combinations; D005260:Female; D019786:Gadolinium DTPA; D006801:Humans; D008279:Magnetic Resonance Imaging / Q000379:methods*; D008297:Male; D008536:Meglumine; D009942:Organometallic Compounds; D004369:Pentetic Acid / Q000031:analogs & derivatives; D000070636:Rotator Cuff Injuries; D013708:Tendon Injuries / Q000175:diagnosis
D003287:Contrast Media; D004338:Drug Combinations; D009942:Organometallic Compounds; D008536:Meglumine; D004369:Pentetic Acid; D019786:Gadolinium DTPA