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Structural Analysis Flashcards

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

Read the first 7 Structural Analysis flashcards as text

  1. How many degrees of freedom does CBP assign to each major body mass (head, thoracic cage, pelvis)?

    Answer: 6

    Each mass can rotate about and translate along the x, y and z axes, for 6 degrees of freedom.

  2. In CBP coronal analysis, a lateral shift of the head relative to the thoracic cage is described as:

    Answer: Tx translation

    Left-right translation occurs along the x-axis, so it is Tx.

  3. On an ideal AP full-spine radiograph, how should the vertebrae align?

    Answer: Vertically stacked, with no lateral translation or curvature

    The ideal coronal spine is straight and vertical, with the vertebrae centered over the sacrum.

  4. Which method does CBP commonly use to measure coronal curvatures on AP films?

    Answer: The modified Risser-Ferguson method

    CBP uses a modified Risser-Ferguson method to measure segmental coronal angles on AP views.

  5. A patient's thoracic cage is translated to the left on the pelvis. In mirror-image analysis, which corrective position applies?

    Answer: Right thoracic cage translation

    Mirror-image correction places the patient in the opposite posture, so a left translation is corrected with a right translation.

  6. On an AP lumbopelvic radiograph, comparing which landmarks best estimates a radiographic leg length difference?

    Answer: Heights of the femoral heads

    Measuring the height difference between the femoral head tops relative to horizontal gives the radiographic leg length difference.

  7. Which rotation in the CBP system corresponds to lateral flexion (tilt) of the head in the coronal plane?

    Answer: Rz

    Lateral bending in the coronal plane is rotation about the z-axis, or Rz.