For an AP oblique lumbar projection (RPO or LPO position), the
1. patient's thorax is rotated until the midcoronal plane is at a 45-degree angle with IR.
2. side of interest is positioned closer to the IR.
3. central ray is centered 2 inches (5 cm) medial to the elevated ASIS at a level 1.5 inches (4 cm) superior to the iliac crest.
4. long axis of the vertebral column is aligned with the short axis of the collimated field.
a. 1 and 3 only
b. 2 and 4 only
c. 1, 2, and 3 only
d. 1, 2, 3, and 4
Question 2
For a lateral lumbar projection,
1. the vertebral column is aligned parallel with the imaging table.
2. align the shoulders, posterior ribs, and posterior pelvic wings perpendicular to the imaging ta-ble.
3. of a scoliotic patient, the patient is positioned on the imaging table so that the central ray is directed into the spinal curve.
4. the patient's knees are flexed and a pillow or radiolucent sponge is placed between them.
a. 1 and 2 only
b. 3 and 4 only
c. 1, 2, and 4 only
d. 1, 2, 3, and 4
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(A) Lumbar puncture, also known as spinal tap; (B) section of the vertebral column showing the spina
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