Forearm

Question 1

What are the essential projections for a forearm image?

Answer 1

AP and Lateral

Question 2

What is the patient position for an AP forearm?

Answer 2

seat the patient close to the radiographic table and low enough to place the entire extremity in the same plane.

Question 3

What should the part position be like for an AP forearm?

Answer 3

elbow extended with hand supinated

humeral epicondyles equidistant from IR

long axis of forearm aligned parallel

Question 4

where should the central ray enter for an AP forearm?

Answer 4

perpendicular to IR and entering the patient at midpoint of forearm

Question 5

What should the collimation be for an AP and lateral forearm?

Answer 5

2 inches distal to the wrist joint and proximal to the elbow joint

1 inch on the sides

Question 6

What structures are shown in an AP forearm image?

Answer 6

entire forearm including wrist and distal humerus.

Question 7

eval - how should the proximal row of carpal bones appear in an AP forearm image?

Answer 7

slightly distorted

Question 8

eval - What happens to the radial head, neck, and tuberosity in an ap forearm image?

Answer 8

they are superimposed over the proximal ulna

Question 9

eval - how should the humeral epicondyles appear in an ap forearm?

Answer 9

they should appear without elongation or foreshortening

Question 10

eval - how should the elbow joint appear in an AP forearm image if the shoulder is placed in the same plane as the forearm?

Answer 10

the elbow joint should be partially open

Question 11

eval - what happens to the space between the radius and the ulnar space in an AP forearm image?

Answer 11

the radioulnar space is open

Question 12

What should the patients position be for a lateral forearm?

Answer 12

the patient should be seated close to the table with entire upper extremity in the same plane and the forearm resting on the ulnar surface

Question 13

part position - how should the elbow be positioned in a lateral forearm position?

Answer 13

flexed at a 90 degree angle with thumb side up

Question 14

part position - How should the ulnar and radial styloid processes be

Answer 14

they should be superimposed

Question 15

where should the central ray be for a lateral forearm?

Answer 15

directed perpendicular to the IR

enters patient at midpoint of forearm

Question 16

What structures are shown in a lateral forearm image?

Answer 16

entire forearm, including wrist and distal humerus in a true lateral position

Question 17

eval - What structures should be superimposed in a lateral forearm image?

Answer 17

the radius and ulna at their distal end

the radial head over the coronoid process

humeral epicondyles

Question 18

eval - what happens to the radial tuberosity in a lateral forearm position?

Answer 18

it faces anteriorly