Chapter 5 Lab

Question 1

For AP external rotation positioning it requires _ so that the interepi-condylar line is parallel to the image receptor (IR)

Answer 1

supination of the hand and external rotation of the elbow

Question 2

For AP external rotation positioning it requires supination of the hand and external rotation of the elbow so that the __ is parallel to the image receptor (IR)

Answer 2

interepi-condylar line

Question 3

For the internal rotation position of the humerus, the hand and arm are rotated internally until the are __ perpendicular to the IR, placing the humerus in a true lateral position.

Answer 3

epicondyles of the distal humerus

Question 4

The hand must be __ to place the epicondyles perpendicular to the IR

Answer 4

pronated and the elbow adjusted

Question 5

Neutral rotation for the humerus the __ is at an approximate 45° angle to the IR

Answer 5

The epicondyles of the distal humerus appear

Question 6

A 45° oblique position of the humerus results when the

Answer 6

palm of the hand is facing inward toward the thigh.

Question 7

When might you not use a grid for the humerus

Answer 7

Older adults or small children or Acromioclavicular (AC) joints that have arm less than 4 inches thick.

Question 8

kVp for shoulder thickness >4 inches and kVp for <4 inches (10 cm)

Answer 8

70 to 85, with grid

70 to 75 kVp without grid)

Question 9

__ source-image receptor distance
(SID) except for AC joints, which may use a __ SID for less beam divergence.

Answer 9

40- to 44-inch (100- to 110-cm)

72-inch (180-cm)