special views knees

• tangential settagast prone

  IR: 8x10 (uni) or 14x17 (bi) screen CW

  PT position: prone, IR under knee, flex knee to minimum of 90 degrees

  CR: angled 15-20 degrees cephalad entering the patellofemoral joint space

  SID: 40"

  Tech: kVp 60 mAs 6
• tangential settagast seated

  IR: 8x10 (uni) or 14x17 (bi) screen CW

  PT position: seated, 90 degree flex in knees, hold IR against the anterior surface of distal femur centered to the joint space between the patella and femoral condyles

  CR: angled 15-20 degrees cephalad entering the patellofemoral joint space

  SID: 40-48"

  Tech: kVp 60 mAs 6
• tangential hughston

  IR: 8x10 screen LW (uni) or 14x17 CW (bi)

  PT position: prone, IR under knee, flex knee 50-60 degrees from full extension

  CR: angled 45 degrees cephalad entering the patellofemoral joint space

  SID: 40-48"

  Tech: kVp 66 mAs 6
• tangential merchant

  IR: 14x17 screen CW

  PT position: supine at the end of the table, knee flex 40 degrees with axial viewer

  CR: angled 30 degrees caudad from horizontal entering midway between the patellae at the level of the patellofemoral joint

  SID: 72"

  Tech: kVp 66 mAs 11
• tangential hobbs

  IR: 14x17 screen CW

  PT position: seated in chair with feet under chair and IR on a step stool.

  CR: perpendicular to the IR entering the mid patellofemoral joint

  SID: 48-50"

  Tech: kVp 60 mAs 8
• pa axial rosenburg

  IR: 14x17 grid CW

  PT position: standing at upright bucky with anterior knee in contact, pt squat as if sitting in a chair to create 45 degree flexion

  CR: horizontal and perpendicular to the center of the IR entering at a level 1/2" inferior to the apex of the patella

  SID: 40"

  Tech: kVp 60 mAs 8
• pa axial holmblad

  IR: 8x10 screen LW

  PT position: kneeling on table with IR under the knee, lean forward 20-30 degree so knee is in 60-70 degree flexion

  CR: perpendicular to the IR entering the mid popliteal crease

  SID:40"

  Tech: kVp 58 mAs 8
• ap axial beclere

  IR: 8x10 screen CW

  PT position: supine, flex knee 40-45 degrees, support under the knee with the ir under the knee.

  CR: perpendicular to the long axis of the lower leg, entering 1/2" inferior to the apex of the patella

  SID: 40"

  Tech: kVp 60 mAs 10
• pa axial camp-coventry

  IR: 8x10 screen LW

  PT position: prone, flex knee 40-50 degrees and rest foot on support, IR under the knee

  CR: perpendicular to the long axis of the lower leg, entering the knee joint

  SID: 40"

  Tech: kVp 50 mAs 8