Upper Limb Radiographic Imaging Quiz

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Questions and Answers

What is the recommended collimation for a forearm x-ray?

Collimate only the lateral border closest to the elbow

Collimate only the lateral border closest to the wrist

Collimate the entire arm from shoulder to wrist

Collimate both lateral borders to the actual forearm area (correct)

What is the minimum source-to-image distance (SID) for a forearm x-ray?

40 inches (102 cm) (correct)

20 inches (51 cm)

30 inches (76 cm)

60 inches (152 cm)

How should the patient be positioned for a lateral forearm x-ray?

Seat patient with shoulder raised above the table

Seat patient with wrist flexed 90°

Seat patient at end of table, with elbow flexed 90° (correct)

Seat patient with elbow fully extended

What is the ideal direction of the central ray (CR) for a lateral forearm x-ray?

CR perpendicular to IR, directed to mid-forearm Signup and view all the answers

What is the recommended minimum source-to-image receptor distance (SID) for this imaging procedure?

40 inches (102 cm) Signup and view all the answers

For analog imaging, what is the recommended kilovoltage (kV) range?

60 to 65 kV Signup and view all the answers

How should the patient be positioned for the wrist imaging?

Seated at the end of the table, with wrist and hand on the image receptor (IR), palm down Signup and view all the answers

What is the recommended central ray (CR) angle for the PA axial wrist (scaphoid) with ulnar deviation?

15° Signup and view all the answers

Which anatomy should be clearly demonstrated in the wrist imaging?

Distal radius and ulna, carpals, and proximal metacarpals Signup and view all the answers

What is the purpose of collimation in this imaging procedure?

To reduce patient exposure to radiation Signup and view all the answers

What might obscure fractures of the scaphoid require in this imaging procedure?

Multiple projections taken with different CR angles Signup and view all the answers

What should be evident in the wrist imaging to show ulnar deviation?

The angle of the long axis of the metacarpals to that of the radius and ulna Signup and view all the answers

What are the clinical indications for forearm imaging?

Fractures, dislocations, osteomyelitis, arthritis Signup and view all the answers

What is the recommended collimation for forearm imaging?

Focused on the actual forearm area with minimal collimation at both ends Signup and view all the answers

What projection is used for calcification or pathology of the dorsal aspect of carpal bones?

Carpal bridge tangential projection Signup and view all the answers

What is the purpose of PA and PA axial scaphoid with ulnar deviation?

Possible scaphoid fractures Signup and view all the answers

What may be required for nondisplaced fractures of the scaphoid?

Additional projections or a CT scan of the wrist Signup and view all the answers

What should be used to protect radiosensitive tissues outside the region of interest during upper limb imaging?

Shielding Signup and view all the answers

What is the recommended patient positioning for forearm imaging?

Fully extending the arm, dropping the shoulder, aligning the forearm with the IR Signup and view all the answers

What is the purpose of the carpal bridge tangential projection?

To visualize calcification or pathology of the dorsal aspect of carpal bones Signup and view all the answers

What is the recommended collimation to avoid cutting off anatomy at either joint during forearm imaging?

Focused on the actual forearm area with minimal collimation at both ends Signup and view all the answers

What is the purpose of PA and PA axial scaphoid with ulnar deviation?

Possible scaphoid fractures Signup and view all the answers

What may be required for nondisplaced fractures of the scaphoid?

Additional projections or a CT scan of the wrist Signup and view all the answers

What should be used to protect radiosensitive tissues outside the region of interest during upper limb imaging?

Shielding Signup and view all the answers

Study Notes

Radiographic Imaging of Upper Limb

Forearm routine involves AP and lateral projections to demonstrate radius, ulna, carpal bones, elbow, and humerus, with specific positioning and exposure instructions
Clinical indications for forearm imaging include fractures, dislocations, and pathologic processes like osteomyelitis or arthritis
Technical factors for forearm imaging include minimum SID, IR size, and kV range for analog and digital systems
Patient positioning for forearm imaging includes fully extending the arm, dropping the shoulder, and aligning the forearm with the IR
Collimation for forearm imaging should be focused on the actual forearm area with minimal collimation at both ends to avoid cutting off anatomy at either joint
Carpal bridge tangential projection is used for calcification or pathology of the dorsal aspect of carpal bones, with specific technical factors and patient positioning
Evaluation criteria for carpal bridge tangential projection include the visualization of specific carpal bones and the position and exposure requirements
PA and PA axial scaphoid with ulnar deviation is used for possible scaphoid fractures, with a warning not to attempt the position before ruling out possible fractures
Nondisplaced fractures of the scaphoid may require additional projections or a CT scan of the wrist
The text provides specific technical factors and patient positioning for wrist imaging, including scaphoid views, radial deviation, and carpal canal imaging
Shielding should be used to protect radiosensitive tissues outside the region of interest during upper limb imaging
The text emphasizes the importance of considering beam divergence and ensuring the inclusion of a minimum distance distal to wrist and elbow joints on the image receptor.

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Description

Test your knowledge of radiographic imaging of the upper limb with this quiz. Explore positioning, technical factors, and evaluation criteria for forearm, wrist, and carpal bridge tangential projections. Learn about clinical indications and the importance of shielding and beam divergence in upper limb imaging.