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Week 7 Knee & Patella Radiographic QC 93

Week 7 Knee & Patella Radiographic QC 93 - Knee...

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1 Knee & Patella Radiography Ltd Knee Series: A-P and Lateral Complete Knee: A-P, Lateral, Tunnel, may include Sunrise or Settegest & Oblique Views B/L Knees: A-P Weight-bearing & Both Laterals
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2 Knee & Patella Radiography May be taken erect or recumbent. Lateral Views more difficult erect due to taper of the femur. Tunnel view very difficult erect. Weight-bearing good to access joint spaces. A B/L P-A Tunnel type view is best for joint assessment but difficult to set up.
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3 Knee & Patella Radiography Some tube angulations is used for all knee views except for the erect lateral view. A 5 degrees cephalad angle is used for the A-P, P-A, Oblique and recumbent lateral views. Because of the density of the bone of the distal femur, views are taken Bucky.
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4 A-P Knee
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5 16.2 Knee A-P Measure: A-P at patella Protection: recumbent : Apron ; erect: Males: Bell; Females: Apron SID: 40” Bucky Tube angle: 5° cephalad Film: 8” x 10” I.D. up
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6 Knee A-P Erect: Patient standing facing tube. Recumbent: Patient supine with knee centered to vertical center of table. Patient internally rotates leg 15° until the knee is in a true A-P position. Femur condyles parallel to film.
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7 Knee A-P Horizontal CR: 1 cm distal to apex of patella Vertical CR: long axis of knee and femur. Film centered to horizontal CR. Collimation Top to Bottom: slightly less than film size
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8 Knee A-P Collimation Side to Side: soft tissue of distal femur and proximal lower leg. Slightly less than film size. Patient Instructions: hold still. Make exposure and let patient relax
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9 Knee A-P Film The joint space should be open. The patella should be midline. The adjacent soft tissues should be well visualized.
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10 Medial Oblique Knee
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11 16.3 Knee Medial Oblique Measure: A-P at patella Protection: Recumbent: apron; Erect: Male: Bell, Female: Apron SID: 40” Bucky Tube Angle: 5° cephalad Film: 8” x 10” Regular I.D. up
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12 Knee Medial Oblique Patient lies supine on table with affected knee centered on table. Patient internally rotates lower leg as far as possible or until the femur condyles form a 40 to 45° angle to film. Avoid letting patient raise pelvis and increase object to film distance.
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13 Knee Medial Oblique Horizontal CR: 1 cm distal to medial condyle. Film centered to horizontal CR. Vertical CR: long axis of femur. Collimation Top to Bottom: slightly less than film size .
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14 Knee Medial Oblique Collimation side to side: soft tissue of knee region or slightly less than film size. Patient instructions: remain still
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15 Knee Medial Oblique Film The fibular head will be clear of the tibia. The Knee joint space should be open. The soft tissue of the knee should be visualized.
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