Hip and Pelvis

Question 1

Hip and Pelvis Series

Answer 1

• Pelvis - AP Pelvis
• Sacroiliac Joints - AP Oblique
• Hip Normal Series - AP and Lateral Oblique

Question 2

AP Pelvis

Answer 2

• Cassette - 35x43, horizontal, in bucky
• Positioning - Weight bearing, pt against bucky facing x-ray tube with hips internally rotated 15 to 20 degrees. Non-weight bearing, pt is supine and hips internally rotated
• Stabilization - Neutral stance or lying comfortably
• Shielding - Gonad shielding without obscuring anatomy
• Instructions - Stand comfortably
• SID - 100cm
• Central Ray - Centre Cassette, midway between level of ASIS and pubis symphysis
• Tube Tilt - 0
• Collimation - M-L, include greater trochanter S-I, top of the cassette 2cm above iliac crest and collimate smaller than cassette with as much femur as possible, include ischial tuberosities and lesser trochanters kV -
• Children 70 and adults 80
• Marker Placement - Superolateral to the anatomy

Question 3

AP Oblique Sacroiliac Joint

Answer 3

• Cassette - 24x30, horizontal, in bucky
• Positioning - Pt upright with their back to the bucky and rotate the SI of interest 25 degrees away from bucky
• Stabilization – standing comfortably, arm can hold bucky
• Shielding - Gonad shielding without obscuring anatomy
• Instructions - Stand comfortably
• SID - 100cm
• Central Ray - 2.5cm medial to ASIS on anterior rotated side
• Tube Tilt - 0
• Collimation - collimate to area of interest
• kV - Children 70 and Adults 80
• Marker Placement - Lateral to anatomy

Question 4

AP Hip

Answer 4

• Cassette - 24x30, vertical, in bucky
• Positioning - Weight bearing, pt against bucky facing x-ray tube with leg internally rotated to 15 to 20 degrees
• Stabilization – standing comfortably, arm can hold bucky
• Shielding - Gonad shielding without obscuring anatomy
• Instructions - Stand comfortably and rotate leg
• SID - 100cm
• Central Ray - Perpendicular to image plate at femoral neck, 2.5cm inferior to the midpoint between the pubic symphysis and ASIS
• Tube Tilt - 0
• Collimation - M-L, inlcude all soft tissues o the hip S-I, superior to the acetabulum and proximal 1/3 of femur
• kV - Children 70 and Adults 80
• Marker Placement - Lateral to anatomy

Question 5

Lateral Oblique Hip (Unilateral Frog Leg)

Answer 5

• Cassette - 24x30, vertical, in bucky
• Positioning - Pt is upright at the bucky and hip is to be abducted to 45 in frog leg position, close to bucky. Non-weight bearing is possible.
• Stabilization – standing comfortably, arm can hold bucky
• Shielding - Gonad shielding without obscuring anatomy Instructions - Stand comfortably and frog leg
• SID - 100
• Central Ray - Perpendicular to cassette at midpoint level of femoral neck
• Tube Tilt - 0 Collimation - M-L, inlcude all soft tissues o the hip S-I, superior to the acetabulum and proximal 1/3 of femur
• kV - Children 70 and Adults 80
• Marker Placement - Lateral to anatomy