Rad Anat Upper Extremity Quiz

Question 1

What is the minimal diagnostic series for the shoulder?

Answer 1

AP with Internal Rotation, AP with External Rotation

Question 2

Humeral Axial Angle

Answer 2

View: AP External Rotation
How: line thru and parallel to the midshaft of humerus. line thru humeral head from the apex of greater trochanter to medial margin. measure the inferior angle
Normal: male 60 degrees, female 62 degrees

Question 3

Glenohumeral Joint Space

Answer 3

View: AP external rotation
How: measure and average joint space at superior, middle, and inferior aspects
Normal: 4-5mm

Question 4

Acromiohumeral Space

Answer 4

View: AP external rotation
How: distance from inferior surface of acromion process to superior articular surface of humeral head
Normal: 7-11mm

Question 5

Acromioclavicular Joint Space

Answer 5

View: AC
How: distance between clavicle and acromion
Normal: 3mm; should be <2-3mm difference R to L

Question 6

Coracoclavicular Distance

Answer 6

View: AP shoulder
How: measure distance from coracoid process to the inferior surface of clavicle
Normal: 11-13mm; or no more than 5mm difference from R to L

Question 7

What is the minimal diagnostic series for the elbow?

Answer 7

AP Elbow, Lateral Elbow

Question 8

Carrying Angle

Answer 8

View: AP Elbow
How: line thru midshaft humerus and line thru midshaft ulna. measure angle.
Normal: 154-178 degrees; average 169 degrees

Question 9

Anterior Humeral Line

Answer 9

View: Lateral Elbow
How: line tangential to anterior humerus
Normal: intersect anterior 1/3 capitellum

Question 10

What is the minimal diagnostic series for the wrist?

Answer 10

PA Wrist, Medial Palmar Oblique Wrist, Lateral Wrist

Question 11

Three Carpal Arcs

Answer 11

View: PA Wrist
Proximal Carpal Line: line drawn along proximal surface of scaphoid, lunate, triquetrum
Mid-Carpal Line: line drawn along distal surface of scaphoid, lunate, triquetrum
Distal Carpal Line: line drawn along proximal surface of capitate and hamate

Normal: smooth arcs

Question 12

Ulnar Variance

Answer 12

View: PA Wrist
How: distal radius projects 0-3mm beyond the ulna
Normal: >3mm = negative ulnar variance

Question 13

PA Radiounlar Angle

Answer 13

View: PA Wrist
How: line tangential to tip of radial styloid and base of ulnar styloid. second line thru axis of radius. measure proximal, ulnar side angle
Normal: 72-95 degrees

Question 15

Lateral Radius Angle

Answer 15

View: Lateral Wrist
How: line thru and parallel to shaft of radius; second line tangential to distal articular surface of radius. measure proximal palm side angle
Normal: 79-94 degrees

Question 16

Lateral Wrist Line

Answer 16

View: Lateral Wrist
How: Draw a line thru the long axis of the radius, lunate, capitate, and 3rd metacarpal.

Question 17

What is the minimal diagnostic series for the hand?

Answer 17

PA Hand, Medial Palmer Oblique Hand, Lateral Hand