Radiographic Positioning Quiz: Projection Radiography Questions

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Questions and Answers

How should the patient be positioned for the PA projection of digits 2-5?

Supine with fingers extended and separated

Seated with the hand pronated and fingers extended (correct)

Standing with the hand pronated and fingers flexed

Seated with the hand supinated and fingers flexed

What is the evaluation criteria for the PA projection of digits 2nd - 5th?

Concave phalange shafts and adjacent digits superimposed

Slight concavity on one side of the phalange shafts with a semi-straight edge on the other side

Rotated medially digits with full concavity on one side of the phalange shafts

Equal soft tissue and concavity, no superimposition of adjacent fingers (correct)

What is the positioning assistance used for the lateral projection of digits 2-5?

Cotton swab

Square sandbag

Triangle sponge

Circular sponge (correct)

How should the hand be positioned for the AP projection of digit 1?

Internally rotated and supinated with posterior surface of thumb in contact with the IR Signup and view all the answers

What is the evaluation criteria for the AP projection of digit 1?

Equal soft tissue and concavity, no rotation indicated by equal concavity on each side Signup and view all the answers

How should the hand be positioned for the PA oblique projection of digit 1?

Pronate hand, abduct thumb slightly away from other fingers Signup and view all the answers

What is the positioning of digits 3-5 for the PA oblique projection?

Lateromedial rotation for digit 3-5 Signup and view all the answers

What is the evaluation criteria for the PA oblique projection of digit 1?

Slight concavity on one side of the phalange shafts with a semi-straight edge on the other side Signup and view all the answers

What is important to check to ensure true AP position during thumb digit imaging?

Looking at nailbed of thumb digit Signup and view all the answers

How should patients be positioned for imaging?

Sitting facing LT(L) Signup and view all the answers

What does CR stand for?

Central Ray Signup and view all the answers

Which projection is used for evaluating fractures, dislocations, and pathology at the base of the 1st metacarpal and trapezium?

PA Stress Thumb Projection Signup and view all the answers

What is the primary purpose of the evaluation criteria for the Lateral 1st Digit projection?

To visualize the base of the 1st metacarpal and trapezium Signup and view all the answers

What is the alternative projection for the 1st digit that increases OID and is NOT ideal for this digit?

AP Axial Projection Modified Robert’s Method Signup and view all the answers

In the PA Stress Thumb Projection, what clinical indication does it primarily address?

Sprain or tearing of the ulnar collateral ligament of the thumb Signup and view all the answers

Which projection ensures that the base of 1st metacarpal and trapezium are well visualized without superimposition?

AP Axial Projection Modified Robert’s Method Signup and view all the answers

What type of projection may be used to adapt to an increase in OID for the 1st digit?

Digits PA 1st Digit Signup and view all the answers

Which projection should ensure that the entire thumb, 1st metacarpal, and trapezium are visualized in a true lateral position?

CR Perpendicular Enters at the 1st MCP joint Signup and view all the answers

What is the clinical indication for using an AP Axial Projection Modified Robert’s Method?

Fractures, dislocations, and pathology at the base of the 1st metacarpal and trapezium Signup and view all the answers

(skiers thumb) trauma protocol - 2 views refers to which projection?

(Adaptation Increases OID) NOT ideal position for the 1st digit Signup and view all the answers

What view increases OID for hand digital radiography?

Digits PA 1st Digit Signup and view all the answers

What type of injury does a PA Stress Thumb Projection primarily address?

Sprain or tearing of the ulnar collateral ligament of the thumb Signup and view all the answers

Study Notes

Hand and Finger Positioning

For a PA projection of digits 2-5, the patient's hand should be positioned with fingers extended and together, and the forearm pronated.

Evaluation Criteria

For a PA projection of digits 2-5, the evaluation criteria include visualization of the entire digit, proper angle, and absence of rotation.
For an AP projection of digit 1, the evaluation criteria include visualization of the entire digit, proper angle, and absence of rotation.
For a PA oblique projection of digit 1, the evaluation criteria include visualization of the entire digit, proper angle, and absence of rotation.

Positioning Assistance

Positioning assistance is used for the lateral projection of digits 2-5 to help maintain proper positioning.

AP Projection of Digit 1

For an AP projection of digit 1, the hand should be positioned with the thumb in a neutral position, forearm pronated, and wrist straight.

PA Oblique Projection of Digit 1

For a PA oblique projection of digit 1, the hand should be positioned with the thumb in a neutral position, forearm pronated, and wrist straight.
Digits 3-5 should be positioned with fingers extended and together, and the forearm pronated.

True AP Position

To ensure a true AP position during thumb digit imaging, check that the volar surface of the thumb is parallel to the image receptor.

Patient Positioning

Patients should be positioned to minimize OID (Object-to-Image Receptor Distance) during hand and finger imaging.

Projection Definitions

CR stands for Central Ray.
A PA oblique projection is used for evaluating fractures, dislocations, and pathology at the base of the 1st metacarpal and trapezium.

Lateral 1st Digit Projection

The primary purpose of the evaluation criteria for the Lateral 1st Digit projection is to visualize the entire thumb, 1st metacarpal, and trapezium in a true lateral position.

Alternative Projections

An AP Axial Projection Modified Robert’s Method is an alternative projection for the 1st digit that increases OID and is not ideal for this digit.
A lateral projection may be used to adapt to an increase in OID for the 1st digit.

Clinical Indications

A PA Stress Thumb Projection primarily addresses a clinical indication of ligamentous injury or instability.
An AP Axial Projection Modified Robert’s Method is used for a (skiers thumb) trauma protocol - 2 views.
A PA Stress Thumb Projection primarily addresses a clinical indication of ligamentous injury or instability.

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Description

Test your knowledge of finger positioning and projection radiography with this quiz. Practice essential projections for digits 2-5, including PA, PA oblique, and lateral views. Learn about general positioning guidelines and correct CR and collimation techniques.

Projection Radiography Positioning Quiz