Projection Radiography Positioning Quiz
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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?

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

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

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

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

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

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

    <p>Lateromedial rotation for digit 3-5</p> Signup and view all the answers

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

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

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

    <p>Looking at nailbed of thumb digit</p> Signup and view all the answers

    How should patients be positioned for imaging?

    <p>Sitting facing LT(L)</p> Signup and view all the answers

    What does CR stand for?

    <p>Central Ray</p> 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?

    <p>PA Stress Thumb Projection</p> Signup and view all the answers

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

    <p>To visualize the base of the 1st metacarpal and trapezium</p> 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?

    <p>AP Axial Projection Modified Robert’s Method</p> Signup and view all the answers

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

    <p>Sprain or tearing of the ulnar collateral ligament of the thumb</p> Signup and view all the answers

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

    <p>AP Axial Projection Modified Robert’s Method</p> Signup and view all the answers

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

    <p>Digits PA 1st Digit</p> 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?

    <p>CR Perpendicular Enters at the 1st MCP joint</p> Signup and view all the answers

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

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

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

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

    What view increases OID for hand digital radiography?

    <p>Digits PA 1st Digit</p> Signup and view all the answers

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

    <p>Sprain or tearing of the ulnar collateral ligament of the thumb</p> 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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    Related Documents

    Finger Positioning Digits 1-5 (PDF)

    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.

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