chapter 7

for an AP pelvis projection (modified Cleaves method), the

-ASIS are positioned at equal distances from the imaging table -knees and hips are flexed until the femurs are aligned at a 60-70* angle with the imaging table

an AP hip projection (modified Cleaves method) obtained with the knee and hip flexed more than 60-70* with the imaging table demonstrates

-an obscured lesser trochanter -the greater trochanter medially

an AP hip projection with accurate positioning demonstrates the

-greater trochanter in profile -femoral neck w/out foreshortening

as one increases the degree of the femoral abduction for an AP hip projection (modified Cleaves method), the

-greater trochanter moves closer to the femoral head -femoral neck demonstrates increased foreshortening

for an AP hip projection (modified Cleaves method), the

-lesser trochanter is demonstrated in profile -the greater trochanter appears at a level halfway between the lesser trochanter and femoral head -ischial spine is demonstrated with pelvic brim superimposition

an AP axial sacral iliac joint projection with accurate positioning demonstrates the

-median sacral crest and symphysis pubis in alignment -sacroiliac joints without foreshortening -symphysis pubis superimposed over the inferior sacral segments -second sacral segment at the center of the image

internally rotating the affected leg for an axiolateral (inferosuperior) projection of the hip

-positions the greater trochanter behind the femoral neck and shaft -positions the lesser trochanter in profile -reduces the posterior decline of the femoral neck

for an AP oblique sacroiliac joint projection (LPO position), the

-sacroiliac joint of interest is positioned farther from the IR -right marker should be used -central ray is centered 1" medial o the elevated ASIS

an AP hip projection obtained with the patients leg in external rotation demonstrates

-the lesser trochanter in profile -a foreshortened femoral neck

which of the following is true with regard to the female pelvis

-the overall shape is wider than on a male pelvis -the obtruator foramen is smaller than on a male pelvis

an optimal AP pelvis projection demonstrates

-the sacrum and coccyx aligned with the symphysis pubis -the ischial spines aligned with the pelvic brim -a symmetrically appearing obturator foramen

a left AP hip projection of a patient who was rotated toward the right side demonstrates

-the sacrum and coccyx rotated toward the left hip -a narrowed left iliac wing

an AP pelvis projection obtained with the patient rotated toward the left hip demonstrates

-the symphysis pubis rotated toward the left hip -a narrower right iliac wing -a narrow obturator foramen -the sacrum and coccyx rotated toward the right hip

how is the patient positioned for an AP projection (modified Cleaves method) of the pelvis to demonstrate the femoral neck without foreshortening

abduct the femurs to 20-30* from vertical

an AP projection of the sacroiliac joints taken with insufficient central ray angulation will

demonstrate the inferior sacrum without symphysis pubis superimposition

an optimal AP pelvis projection (modified Cleaves method) should demonstrate all of the following EXCEPT the

proximal aspects of the greater and lesser trochanters at approximately the same transverse level

a less than optimal AP oblique sacroiliac joint projection demonstrating the ilium superimposing the inferior sacral ala and lateral sacrum will

require decreased pelvic obliquity to obtain optimal positioning

an AP hip projection (modified Cleaves method) obtained with the leg abducted almost to the imaging table demonstrates the greater trochanter

superimposed by the femoral neck

which of the following is NOT TRUE about an AP hip projection (modified Cleaves method)

the femoral neck is superimposed over the lesser trochanter when the knee and hip are flexed to a 60-70* angle with the imaging table

an axiolateral (inferosuperior) hip projection obtained with the patients affected leg in external rotation demonstrates

the greater trochanter in profile posteriorly

which of the following statements is NOT TRUE about an AP pelvis projection obtained with the patient rotated toward the right hip

the left obturator foramen will be narrower than the right obturator foramen

an AP oblique sacroiliac joint projection (RPO position) with poor positioning demonstrates a closed sacroiliac joint, the superior and inferior sacral alae without superimposition, and the lateral sacral ala superimposed over the iliac tuberosity. how was the positioning setup mispositioned for such a projection to be obtained

the pelvis was insufficiently rotated

a less than optimal axiolateral (inferosuperior) hip projection demonstrating the greater trochanter at a transverse level proximal to the lesser trochanter

was obtained using a central ray to femur angle that was too large