Radiology 2 Quiz 2 Flashcards
Minimal diagnostic series for the shoulder?
AP internal, AP external
Minimal diagnostic series for the elbow?
AP, Lateral
Minimal diagnostic series for the wrist?
PA, medial oblique, lateral
Minimal diagnostic series for the hand?
PA, medial oblique, lateral
What is the acromiohumeral space on X-ray?
The distance from inferior surface of acromion process to superior articular surface of humeral head
What is the normal measurement of the acromiohumeral Space?
7-11mm
How do you measure the Glenohumeral Joint Space on x-ray?
measure and then average joint space from the superior, middle and inferior aspects
What is the normal glenohumeral joint space?
4-5mm
What is the normal Acromioclavicular joint space?
2 in image is acromioclavicular joint space
average is 3mm
should be less than 3mm difference from R to L
How do you measure coracoclavicular distance?
3 on image is coracoclavicular distance
from superior aspect of coracoid process to closest point on clavicle
What is the normal coracoclavicular distance?
11-13mm
should be no greater than 5mm difference between R and L
What is the radiocapitellar line on X-ray?
A line through the shaft of the radius should extend through the radial head and mid capitellum
used to identify radial head dislocation
What is the anterior humeral line on X-ray?
line tangential to anterior humeral cortex should intersect at anterior 1/3 of capitellum
capitellum posterior to this line indicates supracondylar fracture
How do you measure lateral radius angle on X-ray?
1st line through and parallel to shaft of radius
2nd line tangential to distal articular surface of radius
measure proximal palm side angle
What is the normal lateral radius angle?
80-95 degrees
i.e. distal articular surface of the radius is tilted slightly palmar
What is a normal ulnar variance?
distal radius projects 0-3 mm beyond the ulna
What is a positive ulnar variance?
the ulna projects more distally
What is a negative ulnar variance?
ulna more proximal
i.e distal radius projects more than 3 mm beyond the ulna
On what view would you evaluated ulnar variance?
PA wrist
On what view would you measure the lateral radius angle?
lateral wrist
On what view would you evaluate carpal row alignment?
PA wrist
How would you evaluate carpal row alignement?
line along proximal articular surface of the proximal row
line along distal articular surface of the proximal row
line along proximal articular surface of the distal row
all three lines should be roughly parallel
On what view would you measure radiacapitellar line?
AP or lateral elbow
On what view would you evaluate anterior humeral line?
lateral elbow
