Evaluation Criteria: Scaphoid, forearm, elbow

Question 1

What should you see on a radiograph of the scaphoid?

Answer 1

-Distal radius and ulna to proximal half of metacarpals
-Scaphoid and adjacent joint spaces open
-Axial method should show scaphoid freer from superimposition
-No rotation
-See boney trabeculae and soft tissue

Question 1

What should you see on a radiograph of the tangential carpal canal position?

Answer 1

-Carpals are in an arch
-Pisiform separate and in profile
-Hook of hamate seen
-Common athletic injuries can be diagnosed with this projection

Question 2

What should you see on a radiograph of an AP forearm?

Answer 2

-Entire forearm and both end joints
-Slight superimposition of proximal radius/ulna
-No elongation/foreshortening of humeral epicondyles
-Partially open wrist and elbow joints
-Open radioulnar space

Question 3

What should you see on a radiograph of the lateral forearm?

Answer 3

-Entire forearm and both end joints
-Superimposition of distal radius/ulna
-Superimposition of radial head and coronoid process
-Superimposed humeral epicondyles
-Radial tuberosity facing anteriorly

Question 4

What should you see on a radiograph of lateral forearm?

Answer 4

-Entire forearm and both end joints
-Superimposition of distal radius/ulna
-Superimposition of radial head and coronoid process
-Superimposed humeral epicondyles
-Radial tuberosity facing anteriorly

Question 5

What should you see on a radiograph of an AP elbow?

Answer 5

-Radial head, neck, and tuberosity slightly superimposed with proximal ulna
-Open humeroradial joint
-No rotation

Question 6

What should you see on a radiograph of a lateral elbow?

Answer 6

-Superimposed humeral epicondyles
-Radial tuberosity facing anteriorly
-Tip of coronoid process should cover ≈ 2/3 of radial head
-Olecranon process in profile

Question 7

What should you see on a radiograph of an AP oblique elbow medially rotated?

Answer 7

-Coronoid process in profile
-Trochlea
-Elongated medial epicondyle
-Ulna superimposed by the radial head and neck
-Olecranon within the olecranon fossa

Question 8

What should you see on a radiograph of a AP oblique elbow laterally rotated?

Answer 8

-Radial head, neck, and tuberosity free of the ulna
-Elongated lateral epicondyle
-Capitulum

Question 9

What should you see on a radiograph of a partially flexed elbow?

Answer 9

-Area of interest (part that is parallel) should be free of distortion
-Area not of interest will be foreshortened

Question 10

What should you see on a radiograph of an acute flexed elbow?

Answer 10

1. Distal Humerus:
   -No rotation
   -Humerus and forearm superimposed
   -Olecranon process and distal Humerus without distortion
2. Proximal Forearm:
   -No rotation
   -Proximal radius and ulna with minimal distortion
   -Joint space is more open that on distal Humerus image