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Chapter 7
Hip and Pelvis
Pelvis
• Connects lower extremities to the axial
skeleton
• Consists of
– ____________
– 1 sacrum
– ____________
• _____________
– 2 hip bones only
Hip Bones
• _________
• Ischium
• ________
• ____________ – The area of fusion for the 3
bones.
Ilium
• _______
– Large winged area
• Body
– Inferior to the Ala. Includes superior
acetabulum
• ____________
• _______, AIIS, PSIS, PIIS.
Ischium
• Inferioposterior to acetabulum.
• ___________
– Posterior acetabulum to ischial tuberosity
• __________
– Anterior portion off of ischial tuberosity
Ischium
• Ischial ____________
– Rounded, rough area at the border of lower
body and Ramus
• Ischial ____________
– Posterior bony protrusion off acetabulum
• Greater/Lesser _____________
– Depression superior and inferior to ischial
spine
Pubis
• Anterioinferior to acetabulum.
• ________
– Anteriorinferior acetabululum to superior ramus
• Superior __________
– Anterior medial extensions meeting to form
symphysis pubis.
• Inferior ___________
– Inferioposterior extension off symphysis pubis to
Ischial Ramus
• _______________
– Hole formed by ischium and pubis
True and False Pelvis
• ___________
– Area surrounded
by bone
– _______to pelvic
brim
– Birth Canal
– Inlet and Outlet
• ____________
– Area formed by
Alae
– ______ to pelvic
brim
Male vs. Female Pelvis
• Male
– Narrower
– Deeper
– ___________
– ______pubic arch
– Narrow inlet
– ______Obturator
Foramen
• Female
– Wider
– ___________
– ______pubic arch
– Larger inlet
– _______ Obturator
Foramen
Joints of the Pelvis
• Sacroiliac Joint ________
– Amphiarthrodial synovial, sacrum to pelvis
• ____________ Pubis
– Amphiarthrodial cartilaginous. Rt and Lt pubic
bones
• Union of Acetabulum
– Synarthrodial cartilaginous. 3 fused hip bones
• _____________
– Diarthrodial synovial spheroid.
Imaging the Pelvis
Routine
•
•
•
•
AP
14 x 17 XW
40” SID
75 kV
AP Pelvis
• Pt __________
• Internally rotate legs ___________
• Center Midline between _______ and
__________Pubis
• Top of Cassette ____________Crest
• Collimate to skin
• If Trauma do not rotate legs *****
Proximal Femur
• __________
– Round process
• ___________
– Depression in the center of the head
• Neck
– Area between shaft and head
• Acetabulum
– Cavity for head of femur
Proximal Femur
• Greater _______________
– Superiolateral prominence
• Lesser _______________
– Medioposterior prominence inferior to greater
trochanter.
• Intertrochanteric Crest
– Depression between trochanters
Femur Angle
• Not ________
• Angle of positioning importance
– Head and neck = ___________angle.
• Rotate legs Internally (Pigeon Toe) to get
______________
Fracture Sign
• Look at the _________
– For symmetry
• If one is _________ and one is
_______rotated, possible fracture.
Hip Imaging
Routine
• AP Pelvis
• AP Unilateral Hip
• Lateral
– Frog Leg
– X-table lateral
• 40” SID
• 75 kV
AP Hip
•
•
•
•
Patient Supine
Rotate Leg ____________
CR directed __________to femoral neck
___medial and ___ distal to _______
Frog leg Lateral
•
•
•
•
Pt Supine
Flex knee and externally ____________
A sponge may help
Center to Femoral Neck
– Draw ___________between ASIS and
Symphysis Pubis and _________
perpendicular to line
X-table Hip
• Pt Supine
• Do not move __________
• Unaffected Leg ______________. Can put
leg on collimator
• Use _____________grid parallel to
femoral neck
• Adjust collimator to be __________ to
cassette.
Sacroiliac Joint Imaging
• Place patient into ____________ Posterior
Oblique
• The joint of interest is _________
– ______ for left SI joint
• Direct CR ____ medial to upside ASIS