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A m e ric an R o en tge n R ay S oc ie ty

A c ro m ia l A n g le o n R a d io g ra p h s

o f th e S h o u ld e r: C o rre la tio n w ith th e

Im p in g e m e n t S y n d ro m e a n d R o ta to r C u ff

T e a r s

Mic h a e l

J . T ui te 1

D a v id A . T o ivo n e n 2

Jo h n F . O rw in 2

D o u g la s H . W rig h t1

R ec e iv ed F ebrua ry 27 , 1 99 5 : acc ep ted a fte r re -

v is ion A p ril 7 , 1 995 .

P res en ted a t th e an nu a l m ee tin g o f the A me rica n

R oe n tg en R a y S oc ie ty , W ash ing to n , D C , M ay 19 95 .

1

D e pa rtm en t o f R ad io lo gy , U n iv e rs ity o f W is -

c on s in C lin ica l S c ie nc e C en te r, 6 00 H igh lan d A ve .,

M ad iso n , W I 53 79 2-3 25 2 . A dd res s c o rres po n-

d en ce to M . J . T u ite .

2D ep artm en t o f O rth op ed ic S u rge ry , U nive rs ity

o f W is co ns in C lin ica l S c ien ce C en te r , M ad iso n , W I

53792 3252.

O B JE C T IV E . T h is s tu d y w as u n d e rta ke n to d e term in e th e re pro d u c ib ility o f m ea -

s u re m e n ts o f an ac ro m ia l an g le o n rad io g ra p h s a n d to co rre la te th o se m ea su rem e n ts

w ith th e p re se n ce o f th e im p in g em en t s y nd ro m e a n d ro ta to r cu ff te a rs .

M A T E R IA L S A N D M E T H O D S . N in e ty -n in e sh o u ld ers in 95 p a tien ts w h o h ad an a rc h

ra d io g ra p h a n d h ad un d e rg o n e s h o u ld e r ar th ro s c op y w ere in c lu d e d in th is re tro s p e ctiv e

s tu d y . T h e ac ro m ia l a n g le w a s m ea s u re d o n th e arch v ie w o f th e s h o u ld er ind e p e nd e n tly

b y th re e o b s erve rs w h o w e re b lin d e d to th e n am e , h is to ry , an d arth ro s co p ic res u lts . T he

a n g le w a s m e as u red a t th e in te rse c tio n o f lin e s d raw n a lo n g th e in fe r io r co rtex o f the

a n ter io r an d p o ster io r p o rt io n s o f the a c ro m io n . In te ro b s erv er v a ria b ility w as d ete rm in e d

b y th e in te rc o rre la tio n co eff ic ien t (a te s t o f rep ro d u c ib ility o f q u an tita tive m ea su re m e n ts ).

T h e a ve ra g e o f th e th ree m e a su rem e n ts fo r e a ch p a tien t w as c o rre la te d w ith th e p re o p e r-

a tive d ia g n o s is an d th e a rth ro sc o p ic fin d in g s .

R E S U L T S . A c orre la tio n w as fo u n d b e tw e en in crea s in g s ev er ity o f c u ff d is ea s e as

d e term in e d o n arth ro s c op y a nd inc rea s in g a cro m ia l a n g le (p