Lower Limb Comp Monday

  1. Minimum SID—
    40 inches (102 cm); may increase to 44 to 48 inches
  2. IR size—
    (14 × 17 inches), lengthwise (or diagonal, which requires 44 inches SID)
  3. Kvp Range
    Digital systems—70 to 80 kV range
  4. Patient Position
    Place patient in the supine position; provide a pillow for patient’s head; leg should be fully extended.
  5. Part Position
    • • Adjust pelvis, knee, and leg into true AP with no rotation.
    • • Place sandbag against foot if needed for stabilization, and dor-siflex foot to 90° to leg if possible.
    • • Ensure that both ankle and knee joints are 1 to 2 inches (3 to5 cm) from ends of IR (so that divergent rays do not projecteither joint off IR).
    • • If limb is too long, place the leg diagonally (corner to corner)on one 35 × 43 cm (14 × 17 inches) IR to ensure that both joints are included. (Also, if needed, a second smaller IR may be taken of the joint nearest the injury site.)
  6. CR Centered to
    perpendicular to IR, directed to midpoint of leg
  7. Recommended Collimation
    Collimate on both sides to skin malleolusmargins, with full collimation at ends of IR borders to include maximum knee and ankle joints.
  8. Anatomy Demonstrated:
    • Entire tibia and fibula must include ankle and knee joints on this projection
Author
MYKE
ID
249652
Card Set
Lower Limb Comp Monday
Description
AP PROJECTION: LEG
Updated