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Lower Extremity Procedures Flashcards

7 cards from real ARRT practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

Read the first 7 Lower Extremity Procedures flashcards as text

  1. For an AP projection of the toes, the central ray is directed perpendicular to the IR at which point?

    Answer: The third metatarsophalangeal joint

    The CR is directed perpendicular to the IR at the third MTP joint, centering the image on the toe joints of interest.

  2. During a stress inversion projection of the ankle, which ligament injury is being evaluated?

    Answer: Lateral collateral ligament complex (ATF, CF, PTF)

    Inversion stress testing evaluates the lateral collateral ligament complex, primarily the anterior talofibular and calcaneofibular ligaments.

  3. For the plantodorsal (axial) projection of the calcaneus, the central ray is angled approximately how many degrees cephalad to the long axis of the foot?

    Answer: 40 degrees

    The CR is angled 40 degrees cephalad to the long axis of the foot to project the calcaneus in the axial plantodorsal view.

  4. For a true AP projection of the hip, the lower limb is rotated internally approximately how many degrees to place the femoral neck parallel to the IR?

    Answer: 15 degrees

    Internal rotation of 15 degrees corrects for the normal anteversion of the femoral neck, placing it parallel to the IR and reducing foreshortening.

  5. Which projection is used to best evaluate the patellofemoral joint space for chondromalacia patellae?

    Answer: Tangential (sunrise/skyline) projection of the patella

    The tangential (sunrise or Merchant) projection profiles the patellofemoral joint, evaluating patellar tracking and cartilage integrity.

  6. For the AP oblique projection of the ankle in medial rotation (mortise view), the foot and leg are rotated medially how many degrees?

    Answer: 15-20 degrees

    A 15–20 degree medial rotation produces the mortise view, placing all three sides of the ankle mortise (tibiotalar joint) in profile.

  7. The Settegast projection is used to evaluate which structure of the knee?

    Answer: Patella in the tangential plane

    The Settegast method is a tangential projection of the patella performed with acute knee flexion to profile the patellofemoral articulation.