Shoulder
What is the most common type of shoulder dislocation?
Anterior dislocation
What is the CR location for the Scapular Y?
2" below shoulder, to midvertebral border of scapula
AP projections of the clavicle are obtained by directing the CR at the _______ of the clavicle?
Midshaft
The CR is centered to what level for SC joint exam?
T2-T3
True/False: A patient should hold 5-8 lbs in their hands for the weighted AC joint exam.
False, weights should be around the wrist and not held
Which AP shoulder rotation demonstrates the lesser tubercles in medial profile?
Internal rotation
When doing a Scapular Y, how much rotation would you use to view the body of the scapula? How much for viewing the acromion and coracoid processes?
45 degrees for body, 60 degrees for coracoid and acromion processes
What is the SID for clavicles?
40"
Onto what side is the patient rotated for a unilateral SC joint exam?
The affected side
What is the SID for acromioclavicular joint x-rays?
72"
What is the CR location for the AP oblique of the shoulder?
Grashey: 2" medial and 2" inferior to the superolateral border of shoulder
What positioning procedure would you use if a Scapular Y is unobtainable due to trauma?
AP trauma oblique, like you would do for the shoulder
What end of the clavicle articulates with the manubrium of the sternum?
Medial/Sternal end
On oblique projections of SC joints, where does the CR enter? (upside or downside)
Upside/Unaffected side
What are the breathing instructions for the acromioclavicular joint exams?
Suspend breathing
The CR is rotated how many degrees and in which direction for the Lawrence Method?
25-30 degrees medially
Why is the recumbent lateral scapula position not ideal?
Results in a magnified image due to OID
What two joints must be included on the clavicle x-ray?
Acromioclavicular and sternoclavicular
What is the degree of obliquity for SC joints?
10-15 degrees
What bones form the acromioclavicular joint?
Lateral end of clavicle and acromion of scapula
List two bony landmarks for the shoulder
Coracoid process & AC joint
What is the minimum exposure time for the AP scapula projection? What is the desirable exposure time?
3 seconds minimum, 4-5 desirable
The lateral end of the clavicle articulates with the _______ of the scapula?
Acromion
What type of joint is an SC joint? (Two words)
Synovial, Diarthrodial
What type of joint is an AC joint? (Two words)
Synovial, Diarthrodial