extra practice questions: chapter 9 - scoliosis, sacrum and coccyx, & SI joints

what projection is typically used to assess scoliosis

A. AP

B. Lateral

C. PA erect

D. Oblique

C. PA erect

why is a PA projection preferred over AP for scoliosis imaging

A. better image quality

B. reduces radiation exposure to the thyroid and breast

C. improved patient comfort

D. easier to position the patient

B. reduces radiation exposure to the thyroid and breast

what is the typical SID for scoliosis imaging

A. 40 inches

B. 44 inches

C. 60 inches

D. 72 inches

D. 72 inches

what is the proper central ray angle for an AP axial projection of the sacrum

A. 10 cephalad

B. 15 cephalad

C. 30 cephalad

D. 20 caudad

B. 15 cephalad

what is the central ray angle for an AP axial coccyx projection

A. 5 cephalad

B. 10 caudad

C. 15 cephalad

D. 20 caudad

B. 10 caudad

where should the central ray be directed for a lateral sacrum and coccyx projection

A. 2 inches anterior to the posteror sacrum

B. at the ASIS

C. 3-4 inches posterior to the ASIS

D. 2 inches posterior to the iliac crest

C. 3-4 inches posterior to the ASIS

what is the recommended collimation for an AP axial sacrum projection

A. to include the entire lumbar spine and pelvis

B. to include only the sacrum

C. to include the sacrum and coccyx

D. to include the sacrum and SI joints

C. to include the sacrum and coccyx

what is the proper degree of patient rotation for an oblique Si joint projection
A. 15
B. 25-30

C. 45

D. 60

B. 25-30

in an RPO position for SI joints, which side is demonstrated

A. Left

B. Right

C. Both

D. neither

A. Left

what is the central ray angle for an AP axial SI joint projection

A. 15 cephalad

B. 20 caudad

C. 30-35 cephalad

D. 40 cephalad

C. 30-35 cephalad

which projection best demonstrates the Si joint space

A. lateral sacrum

B. oblique SI joints

C. AP axial sarum

D. Ap lumbar spine

B. oblique SI joints