Pelvic Radiography Techniques and Errors
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Questions and Answers

What modification should be made for a repeat exposure if an AP axial (Taylor method) radiograph shows foreshortened anterior pelvic bones?

  • Increase central ray angle
  • Center central ray at level of ASIS
  • Place patient prone on table
  • Reverse central ray angle (correct)
  • What is the specific positioning error when an AP pelvic radiograph demonstrates a narrowed left obturator foramen?

  • Excessive tilt to the right side
  • More rotation towards the left side (correct)
  • Patient not properly centered
  • Incorrect SID used
  • Which of the following bones is not part of the pelvis?

  • Left hip
  • Femur (correct)
  • Right hip
  • Sacrum
  • What additional projection(s) can be taken to further assess pelvic fractures after an AP pelvis projection?

    <p>Posterior oblique and Judet method</p> Signup and view all the answers

    Which of these is one of the divisions of the hip bone?

    <p>Ilium</p> Signup and view all the answers

    What modifications are needed during the repeat exposure if a PA axial oblique (Teufel method) radiograph shows acetabulum distortion?

    <p>12° cephalic rotation</p> Signup and view all the answers

    What name is given to one half of the pelvic girdle?

    <p>Innominate bone</p> Signup and view all the answers

    If the central ray for an AP axial (Taylor method) radiograph is angled 30° caudad, what should be the positioning factor if the anterior pelvic bones are foreshortened?

    <p>Reduce angle of central ray</p> Signup and view all the answers

    Which of the following landmarks is a palpable bony landmark?

    <p>Greater trochanter</p> Signup and view all the answers

    What is the name of the imaginary plane that separates the true pelvis from the false pelvis?

    <p>Pelvic brim</p> Signup and view all the answers

    What type of angle is the pubic arch angle on an average male pelvis?

    <p>Acute angle</p> Signup and view all the answers

    Which structure is labeled as the femoral neck in the radiographs?

    <p>Femoral Neck</p> Signup and view all the answers

    What is shown in Fig. 7.8?

    <p>Left Femur</p> Signup and view all the answers

    Which projection is indicated in Fig. 7.9?

    <p>Bilateral Hip</p> Signup and view all the answers

    Which of the following structures represents the greater trochanter?

    <p>Greater Trochanter</p> Signup and view all the answers

    Which characteristic indicates a male pelvis?

    <p>Heart-shaped (oval) inlet</p> Signup and view all the answers

    Which structure is considered the most posterior in relation to the pelvis?

    <p>Ischial spines</p> Signup and view all the answers

    What is the term for the small depression near the center of the femoral head?

    <p>Fovea capitis</p> Signup and view all the answers

    Which of the following joints has amphiarthrodial mobility?

    <p>SI joints</p> Signup and view all the answers

    Which device is used to equalize density in an axiolateral hip projection?

    <p>Boomerang compensating filter</p> Signup and view all the answers

    What modality is used to assess joint stability during lower limb movement in infants?

    <p>Sonography</p> Signup and view all the answers

    A geriatric patient with an externally rotated lower limb may have which condition?

    <p>A fractured proximal femur</p> Signup and view all the answers

    What pathologic indication may lead to early fusion of the SI joints?

    <p>Ankylosing spondylitis</p> Signup and view all the answers

    What is the appropriate CR angle for the Judet method?

    <p>None. CR is perpendicular</p> Signup and view all the answers

    Which projection should be used to evaluate the pelvic inlet for possible fracture?

    <p>AP axial projection</p> Signup and view all the answers

    What action should be taken if a unilateral frog-leg projection demonstrates foreshortening of the femoral necks?

    <p>Abduct femur 20-30° from vertical</p> Signup and view all the answers

    In a radiograph of an AP hip, if the lesser trochanter is not visible, is it necessary to repeat the exposure?

    <p>No, it is acceptable based on anatomy</p> Signup and view all the answers

    What is the primary use of the modified axiolateral projection?

    <p>To provide a view of the nontraumatic lateral hip</p> Signup and view all the answers

    Which projection(s) are most commonly performed for a young patient with SCFE?

    <p>AP Pelvis, bilateral modified</p> Signup and view all the answers

    What likely artifact might obscure the femur in an axiolateral projection of a hip?

    <p>False leg higher</p> Signup and view all the answers

    Which method is designed specifically for imaging in patients with suspected hip joint pathologies?

    <p>Danelius-Miller method</p> Signup and view all the answers

    Which radiographic appearance consists of numerous small lytic lesions?

    <p>Hallmark sign of spurring and narrowing of joint space</p> Signup and view all the answers

    What indicates that the proximal femurs are positioned correctly for a true AP projection?

    <p>Appearance of the greater trochanter in profile</p> Signup and view all the answers

    What is another term for the outlet of the true pelvis?

    <p>Inferior aperture</p> Signup and view all the answers

    What is a typical physical sign for a possible hip fracture?

    <p>External rotation</p> Signup and view all the answers

    Which projection is often performed to evaluate pediatric patients for congenital hip dislocation?

    <p>Bilateral modified Cleaves method</p> Signup and view all the answers

    What type of central ray angle is required for the AP axial outlet projection for a male patient?

    <p>10° to 15° cephalad</p> Signup and view all the answers

    How much is the pelvis rotated for a PA axial oblique projection (Teufel method) for acetabulum?

    <p>35° to 40° toward affected side</p> Signup and view all the answers

    What type of CR angle is required for the PA axial oblique (Teufel method) for acetabulum?

    <p>20° caudad</p> Signup and view all the answers

    Study Notes

    Radiographic Characteristics of Male/Female Pelvis

    • Heart-shaped (oval) inlet: Male pelvis
    • Acute pubic arch (less than 90°): Male pelvis
    • Iliac wings that are more flared and rounded in: Male pelvis
    • Obtuse pubic arch (greater than 90°): Female pelvis

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    Description

    Test your knowledge of pelvic radiography techniques and common positioning errors. This quiz covers key concepts such as the AP axial (Taylor method), PA axial oblique (Teufel method), and anatomy related to the pelvic girdle. Assess your understanding of the projections and modifications needed for accurate imaging.

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