PA oblique shoulder (y-view)

Question 1

• What is the purpose of this image when evaluating a shoulder injury?

Answer 1

Used to see anterior or posterior dislocation of humeral head

Question 2

• How much should the patient be rotated for a properly positioned Y-view?

Answer 2

45-60 degrees

Question 3

• Which way should the patient be rotated for this image if they suffer from a left shoulder injury?

Answer 3

LAO

Question 4

• Upon analysis of your image, you notice that the thicker border of the scapula is demonstrated laterally and the thinner border of the scapula is superimposed over the ribs. What is your positioning error?

Answer 4

Under rotated

Question 5

• In a properly positioned Y-view, which process is demonstrated closest to the ribs? Which process if demonstrated away from the ribs?

Answer 5

coracoid process closest to ribs
Acromion process furthest away from ribs

Question 6

• If no injury is present, where should the humeral head be demonstrated?

Answer 6

Between coracoid and acromion process

Question 7

• If the patient suffers from an anterior dislocation of the humeral head, where will the humeral head be demonstrated?

Answer 7

Under coracoid process

Question 8

• If the patient suffers from a posterior dislocation of the humeral head, where will the humeral head be demonstrated?

Answer 8

Acromion process