Scapulae

Question 1

Basic projections for scapula

Answer 1

1. AP
2. Lateral

Question 2

Patient positioning of AP of scapula

Answer 2

• patient standing facing the x-ray tube with the midscapula centered on the IR
• Top edge of IR should be 5cm from the shoulders and 5cm from lateral margin of rib cage.
• Rotate the trunk 30 degrees towards the affected side to bring the blade of the scapula parallel to the IR
• Elbow of affected limb is flexed and dorsum part rest on the hip
• arm is rotated internally to move scapula laterally away from the ribcage

Question 3

Centering point

Answer 3

2.5 cm inferior and medial to the head of the humerus

Question 4

Evaluation criteria for AP projection of the scapula

Answer 4

• collimation to area of interest
• Medial portion of the scapula is seen through the thoracic structures
• Affected arm is abducted 90 degrees evidence by the lateral boarder free of superimposition
• Optimal density and contrast with no motion. Demonstrate clearly sharp bobeyv

Question 5

Lateral projection of the scapula

Answer 5

• patient facing the Image receptor
• Humerus slightly abducted to separate the humeral shaft from the blade of the scapula and flex the elbow
• Raise the unaffected side of the trunk until the broad plane of the scapula is 90 degrees to IR
• Place anatomical marker, collimate and apply radiation protection.

Question 6

Centering point of lateral projection of the scapula

Answer 6

• center to mid point of the medial border and to the middle of the IR.

Question 7

Evaluation criteria for lateral scapula

Answer 7

• true latera is evidenced by the superimposition of vertebral and lateral borders
• Collimation of area of interest
• Bony borders and acromion process should be seen