Criteria for humerus and shoulder projections Flashcards
kVp range for humerus and shoulder with grid:
70-85
kVp range for humerus and shoulder without grid:
70-75
use of grid is needed for thickness of:
greater than 10 cm
mA and exposure time for humerus and shoulder:
high mA
short exposure time
focal spot size for humerus and shoulder:
small
SID
40 to 44-inch
AC joints you can use 72
filter for humerus and shoulder:
boomerang for AP projections of shoulder and scapula
shoulder projections are best performed:
erect (when possible)
The use of contact shield over the breast, lung, and thyroid regions is recommended for most shoulder projections.
true
collimation:
close collimation to ensure optimal quality
routine projections for humerus:
AP
rotational lateral
routine projections for shoulder:
AP external rotation
AP internal rotation
routine projections for clavicle:
AP
AP axial
routine projections for scapula:
AP
lateral (erect/recumbent)
what rotation is needed for the greater tubercle to be profiled laterally?
external
what rotation is needed for the humeral epicondyles to be angled 45° to IR?
neutral
what rotation is needed for the epicondyles to be perpendicular to the IR?
internal
what rotation is needed for supination of the hand?
external
what rotation is needed for the palm of the hand to be against the thigh?
neutral
what rotation is needed for the proximal humerus to be in a lateral position?
internal
what rotation is needed for the proximal humerus to be in position for an AP projection?
external rotation
This special projection of the shoulder places the glenoid cavity in profile for an “open” scapulohumeral joint?
Grashey method
What type of CR angle is required for the apical AP axial shoulder (Garth method) projection?
15° cephalad
10-15° caudad
30° caudad
40° caudad
45° caudad
For the erect version of the tangential projection for the intertubercular sulcus, the patient leans forward _______ from vertical.
10-15°
What CR angulation is required for the tangential projection-supraspinatus outlet (Neer method)?
none; CR is perpendicular
25° anteriorly and medially
10-15° caudad
45° caudad
10-15° caudad
Which anatomy is best demonstrated by the Alexander method?
AC joints
A PA axial projection of the clavicle requires a 15-30° caudad CR angle.
true
What CR angle should be used for the inferosuperior axial projection for the scapulohumeral joint space?
25-30° medially
If a patient can’t fully abduct the affected arm 90° for the inferosuperior axial projection (Clements modification), the tech can angle the CR _____° toward the axilla
5-15
