Question 1

Which of the following projections might be used to examine an acute injury to the shoulder?
1) PA oblique projection (Scapular Y)
2) Transthoracic lateral projection
3) AP projection with external rotation

Accepted Answer

The answer of Which of the following projections might be...

Question 2

What is the proper patient position for the AP oblique projection (Grashey method)of the shoulder?

Accepted Answer

The proper position for the AP oblique projection (Grashey method) of the shoulder involves placing the patient's coronal plane 35 to 45 degrees to the IR with the posterolateral aspect of the shoulder in contact with the table or upright Bucky.

Question 3

Where does the CR enter the patient for the AP oblique projection (Grashey method)of the shoulder?

Accepted Answer

The answer of Where does the CR enter the patient...

Question 4

What is the proper CR angle and direction on the AP axial projection of the clavicle?

Accepted Answer

The proper CR angle and direction on the AP axial projection of the clavicle is 13 to 30 degrees cephalic. This is because the clavicle runs obliquely and superiorly from the sternum to the scapula, and this angle helps to project the clavicle above the ribs and the lung fields.

Question 5

Where is the CR entrance point for the AP projections of the shoulder?

Accepted Answer

The CR entrance point for the AP projection of the shoulder is 1 inch medial and inferior to the coracoid process. This ensures that the glenohumeral joint is properly visualized without superimposition of the coracoid process. Options A and D are incorrect because they specify a location superior to the coracoid process or acromion, respectively, which would result in superimposition of these bony structures on the image. Option C is incorrect because it specifies a location inferior to the anatomical landmark of interest.

Question 6

What is the proper CR angle and direction on the PA axial projection of the clavicle?

Accepted Answer

The PA axial projection of the clavicle requires a caudal angle of 13 to 30 degrees to project the clavicle above the thoracic structures.

Question 7

Which projection and position of the shoulder demonstrate the greater tubercle of the humerus in profile?

Accepted Answer

The AP projection with external rotation positions the greater tubercle of the humerus laterally, allowing it to be profiled or seen in its entirety on the radiograph. This is a standard method for evaluating the greater tubercle's structure without overlap from other parts of the shoulder.

Question 8

What is the relationship of the humeral epicondyles with the IR for the AP projection of the shoulder in external rotation?

Accepted Answer

The humeral epicondyles are parallel to the image receptor (IR) for the AP projection of the shoulder in external rotation, ensuring an accurate representation of the shoulder anatomy.

Question 9

Which clavicle projections and patient position are more comfortable for the patient with an injury to the clavicle?

Accepted Answer

AP and AP axial projections with the patient in a recumbent position are generally more comfortable for patients with clavicle injuries, as they minimize movement and discomfort.

Question 10

What are the proper patient instructions for the AP projection of the shoulder?

Accepted Answer

For the AP projection of the shoulder, patients are typically instructed to stop breathing and remain still to avoid any motion that could blur the image.

Question 11

Which projection and position of the elbow demonstrates the radial head and capitulum without superimposition?

Accepted Answer

An AP oblique projection with 45-degree lateral rotation position will separate the radial head and capitulum, avoiding superimposition.

Question 12

Which projection and position demonstrates the coronoid process of the ulna without superimposition?

Accepted Answer

The AP oblique projection with a 45-degree medial rotation position is used to demonstrate the coronoid process of the ulna without superimposition. This position angles the ulna in such a way that the coronoid process is clearly visible without being overlapped by the radius.

Question 13

What is the proper relationship of the humeral epicondyles with the IR for the lateral projection of the humerus?

Accepted Answer

For the lateral projection of the humerus, the humeral epicondyles should be perpendicular to the image receptor (IR) to accurately depict the humerus in a true lateral position.

Question 14

What are the proper patient instructions for the transthoracic lateral projection of the shoulder?

Accepted Answer

The patient should be instructed to breathe slowly and deeply to avoid motion artifact during the exposure. A) is incorrect as telling the patient to stop breathing is impossible. C) is incorrect as panting would cause motion artifact. D) is incorrect as proper patient positioning and breathing instructions are essential for obtaining a diagnostic image.

Question 15

What elbow anatomy is best demonstrated on the AP oblique projection in 45-degree medial rotation?

Accepted Answer

The AP oblique projection in 45-degree medial rotation best demonstrates the coronoid process of the ulna and the trochlea.

Question 16

What anatomy is best demonstrated in the AP projection of the shoulder in internal rotation?

Accepted Answer

The lesser tubercle of the humerus is best demonstrated in profile on an AP projection of the shoulder in internal rotation.

Question 17

What specific anatomy is demonstrated without superimposition in the AP oblique projection in 45-degree lateral rotation?

Accepted Answer

The answer of What specific anatomy is demonstrated without superimposition...

Question 18

What is the relationship of the humeral epicondyles with the IR for the AP projection of the shoulder in internal rotation?

Accepted Answer

The humeral epicondyles should be perpendicular to the IR for an AP projection of the shoulder in internal rotation. This positioning helps to ensure that the glenoid cavity is visualized in profile and minimizes superimposition of other structures in the joint.

Question 19

Which of the following describes the proper method to position the humerus for an AP projection?

Accepted Answer

For an AP projection of the humerus, the upper limb should be abducted (moved away from the body), the elbow extended (straightened), and the humeral epicondyles should be parallel to the image receptor (IR) to accurately visualize the humerus in an anterior-posterior orientation.

Question 20

Which projection of the shoulder demonstrates the glenohumeral joint with an open joint space and the glenoid process in profile?

Accepted Answer

The AP oblique projection (Grashey method) demonstrates the glenohumeral joint with an open joint space and the glenoid process in profile. This projection is achieved by rotating the patient 35-45 degrees toward the affected side and elevating the arm to 90 degrees, which allows for a true lateral view of the glenoid fossa. The other projections do not provide a clear view of the glenoid process in profile.

Quiz 13: Upper Extremity and Shoulder Girdle

Which of the following projections might be used to examine an acute injury to the shoulder? 1) PA oblique projection (Scapular Y) 2) Transthoracic lateral projection 3) AP projection with external rotation

What is the proper patient position for the AP oblique projection (Grashey method) of the shoulder?

Where does the CR enter the patient for the AP oblique projection (Grashey method) of the shoulder?