J Korean Radiol Soc.  1995 Jan;32(1):169-172.

Simple Radiographic Finding of Subacromial Impingement Syndrome

• Kim YS
• Lee YC
• Kim KS
• Joo SS
• Song IS
• Lee KH
• Chun JM

Abstract

PURPOSE
We evaluated both the patients and the normal volunteers to determine the diagnostic criteria of subacromial impingement syndrome.
MATERIALS AND METHODS
We analyzed the radiologic finding of Thirty degree of caudal tilt view (TCTV) and Supraspinatus outlet view (SOV) of 100 shoulders from 85 patients with clinically proved subacromial impingement syndrome and normal 100 shoulders from 60 volunteers. RESULT: In TCTV, the protrusion of acromion below the line of extension from inferior surface of clavicle was shown in 94% of the patient group and 48% in normal group. Sharp tip of acromial protrusion was detectable in 55.3% of the patient group and 10.4% in normal group. In SOV, curved type of acromion was seen in 53% of the normal and 50% in patient group. Hooked type of acromion was detected in 3% and 31% of the normal and patient group, respectively.
CONCLUSION
Protrusion of acromion at TCTV itself was not a criteria of subacromial impingement syndrome, but more than 7 mm below the line of extension from inferior surface of clavicle was meanigful. In SOV, hooked type of acromion was a criteria of subacromial impingement syndrome but curved type is was not a finding of diagnostic significence. Acromial spur formation on TCTV and SOV was important criteria of subacromial impingement syndrome.

MeSH Terms

Acromion
Clavicle
Healthy Volunteers
Humans
Shoulder
Shoulder Impingement Syndrome*
Volunteers