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1513 Ch 8 positioing

RTE 1513 Chp 8 positioning review

Which two bony landmarks need to be palpated for hip localization ASIS, Symphysis pubis
To achieve a true AP position of the proximal femur, the lower limb must be rotated ________. 15-20* internally
Method one to locate the femoral head Find the mid point between the ASIS and symphysis pubis. Neck 2.5 inches and the head is 1.5 inches distal at right angles
Method two to locate the femoral head Locate ASIS, Go 1-2 inches medial and 3-4 inches distal to the ASIS
Which structures on an AP pelvis or hip radiograph indicate whether the proximal head and neck are in position for a true AP projection Lesser trochanters slightly or not visible
Which physical sign may indicate that a patient has a hip fracture external rotation of effected leg
Which projection should be taken first reviewed by a radiologist before attempting to write the hip into a lateral position (if trauma is suspected) AP Pelvis
what is the advantage of using 90kV rather than 80kV range for hip and pelvis studies on younger patients It reduces the patient dose by 30%
What is the disadvantage of using 90kV for hip and pelvis studies,especially on older patients with some bone mass loss Decreases contrast, bones my appear to gray
Common clinical indication for performing pelvic and hip exam on a pediatric patient Developmental dsyplasia of hip (DDH)
Which imaging modality is most sensitive in diagnosing early signs of metastatic carcinoma of the pelvis Nuclear medicine
A degenerative joint disease Osteoarthritis
Most common fracture in older patients because of high incidence of osteoporosis or avascular necrosis Proximal hip fracture
A malignant tumor of the cartilage hip Chondrosarcoma
A disease producing extensive calcification of the longitudinal ligament of the spinal column Ankylosing spondylitis
A fracture resulting form a severe blow to one side of the pelvis Pelvic ring fracture
Malignancy spread to bone via the circulatory and lymphatic systems or direct invasion Metastatic carcinoma
Now referred to as developmental dysplasia of the hip Congenital dislocation
Which of the following modalities will best demonstrate a possible pelvic ring fracture CT
Both joints must be included on an _____ and ____ projection of the femur even if a fracture of the proximal femur is evident AP, lateral
Where is the central ray placed for an AP pelvis projection Midway between ASIS and symphysis pubis
Which ionization chambers should be activated when using automatic exposure control for an AP pelvis projection Upper right and left chambers
Which specific positioning error is present when the left iliac wing is elongated on an AP pelvis radiograph Rotation in that direction (left)
Which positioning error is present when the left obturator foramen is more open than the right side on an AP pelvis projection Rotation in the direction to the right
Used for patients with traumatic or non-traumatic injuries: Danelius-miller Traumatic
Used for patients with traumatic or non-traumatic injuries: Unilateral frog-leg Non-traumatic
Used for patients with traumatic or non-traumatic injuries: Modified Cleaves (bilateral frog-leg) Non-traumatic
Used for patients with traumatic or non-traumatic injuries: Clements-Nakayama Traumatic
Used for patients with traumatic or non-traumatic injuries:Anterior pelvic bones Traumatic
which projection is recommended to demonstrate the superoposterior wall of the acetabulum PA axial oblique
How many degrees are the femurs abducted (from the vertical plane) for the bilateral frog-leg projection 40-45*
where is the central ray placed for a unilateral frog-leg projection midfemoral neck
which cassette size should be used for an adult bilateral frog-leg projection 14x17 crosswise
Where is the central ray placed for an AP bilateral frog-leg projection 1 inch superior of the symphysis pubis
Which central ray angle is required for the outlet projection (Taylor method) for a female patient 30-40* cephalad
Which type of pathologic feature is best demonstrated with the Judet method Acetabular fractures
How much obliquity of the body is required for the Judet method 45*
what type of CR angle is used for a PA axial oblique (Teufel) projection 12* cephalad
How is the pelvis (body) positioned for a PA axial oblique (Teufel) projection PA 35*-40* toward affected side
The axiolateral (inferosuperior) projection is designed for ______ situations Trauma
How is the unaffected leg positioned for the axiolateral hip projection Flexed and thigh near vertical
The modified axiolateral requires the CR to be angled _____ posteriorly from horizontal 15-20*
Which special projection of the hip demonstrates the anterior and posterior rims of the acetabulum and the ilioischial and iliopubic columns Posterior oblique pelvis (Judet method)
Axiolateral (inferosuperior) Danelius-miller
Modified axiolateral Clements-nakayama
Bilateral or unilateral frog-leg Modified cleaves
PA axial oblique for acetabulum Teufel
AP axial for pelvic "outlet" bones Taylor
Posterior oblique for acetabulum Judet
What is the optimal amount of hip abduction applied for the unilateral "frog-leg" protection to demonstrate the femoral neck without distortion 20-30* from vertical
Created by: Joker71