Quiz - upper limbs & shoulder joint

What is the image receptor size suitable for humerus AP internal rotation?

• 14 x 14 inches

• 14 x 17 inches

• 10 x 8 inches

• 10 x 12 inches

Basic projection for forearm is _____.

• AP humerus

• AP shoulder

• AP elbow joint

• AP radius/ulna

_____ is suitable for AP wrist.

• Patient need change to hospital gown

• Source image distance (SID) is 180cm

• 8 x 10 inches image receptor size

• Exposure factor 69 kVp and 7 mAs

▪ Direction: CR is perpendicular to IR

▪ Point: ~2.5 cm inferior to left coracoid process

 

What is the possible projection for the above criteria?

• AP clavicle

• AP shoulder

• Axial shoulder

• Supero-inferior of shoulder

-Seat the patient at the end of table

-Flex the elbow about 90°, rest forearm & wrist on table

-Place palmar aspect of hand on IR to include wrist joint

-Extend fingers, separate slightly and space evenly

The statement above is best for ............. projection.

• PA middle finger

• PA thumb

• PA hand

• AP wrist

Based on the image, label A, B and C

Answer explanation

A - PHALANGES

B - METACARPAL

C - CARPAL

Based on the image, describe the patient and part positioning of the projection.

Answer explanation

-Seat the patient at the end of table

-Rest palm, wrist and lower forearm in straight line & aligned on IR

-Place small pad under MCP joint of hand

-Place anatomical marker and apply protection

Based on the image, state the central ray (CR) point and direction of the x-ray tube

Answer explanation

•Central ray:

•CR is perpendicular to IR

•~2.5 cm inferior to left coracoid process

•Note: Coracoid process is 2.5 cm inferior to top skin margin of shoulder