##### Review Exercise E

Which routine projections are required for a study of the forearm

AP and Lateral

True/False:

For a forearm study, the technologist needs to include only the joint closest to the site of the injury

false

To properly position the patient for an AP projection of the elbow, the epicondyles must be _____________ to the IR

parallel

If the patient cannot fully extend the elbow for the AP projection, what alternative projection(s) should be performed

Two AP projections (partially flexed), one with humerus parallel to the IR and one with the forearm parallel to the IR

Which routine projection of the elbow best demonstrates the radial head, neck, and tuberosity with slight (if any) superimposition of the ulna

AP oblique with 45 degree lateral rotation

True/False:

Lead (gonadal) shielding is not required for upper limb radiographs if the patient can sit upright for these exams

False

because of scatter or divergent rays or both reaching the gonads

Which projection of the elbow best demonstrates the coronoid process in profile

AP oblique with 45 degree medial rotation

The best position to evaluate the posterior fat pads of the elbow joint is

Lateral, flexed 90 degrees

Which special projection(s) of the elbow should be performed instead of the routine AP if the patient's elbow is tightly flexed and cannot extend at all

Two projections- CR perpendicular to humerus and CR perpendicular to forearm (acute flexion projection)

How much is the upper limb rotated for a lateral (rotation) oblique projection of the elbow

45 degrees laterally

How much and in which direction should the central ray be angled for the trauma axial lateral projection (Coyle method) involving the radial head

45 degrees toward shoulder

How much and in which direction should the central ray be angled for the trauma axial lateral projection (Coyle method) involving the coronoid process

45 degrees away from shoulder

What is the amount of elbow flexion required for the trauma lateral projection (Coyle method) to demonstrate the coronoid process

80 degrees of flexion

What is the only difference among the four radial head lateral projections of the elbow

the rotational position of the hand and wrist