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RAD125 L Spine

Lumbar, Sacrum and Coccyx Anatomy Handout

QuestionAnswer
Which 2 projections will demonstrate the right sacroiliac joint? AP Oblique, LPO position PA Oblique, RAO position
Which of the following is the essential projection used to demonstrate the zygapophyseal joints of the lumbar spine? AP Oblique
Where is the central ray positioned for a lateral coccyx? 3.5 inches posterior to ASIS and 2 inches inferior
Where is the central ray positioned for a lateral sacrum? At the level of the ASIS and 3.5 inches posterior
The respiration phase for the AP oblique projection of the lumbar spine is: Expiration
The intervertebral foramina of the superior four lumbar vertebrae are situated how many degrees from the midsagittal plane? 90
All of the following might be used to provide an optimal image on a lateral projection of the lumbar spine, except: sponge to support spine in horizontal position 72" SID close collimation lead rubber sheet 72" SID
Which plane is placed perpendicular to the tabletop and centered to the midline of the grid for a lateral lumbar spine? midcoronal plane
the central ray angle for a lateral coccyx and sacrum is: 0 degrees
If the lumbar spine cannot be adjusted so it is horizontal for the lateral projection, the central ray should be angled: 5 degrees men, 8 degrees women, caudad
When only the lumbar vertebrae (not lumbosacral) are imaged in the AP projection, the central ray is directed how many inches above the iliac crests? 1.5
Occasionally, a patient may have to be placed in the prone position for sacrum radiography, and a PA projection performed. What is the central ray angle for this projection? 15 degrees caudad
What is the central ray angle for the AP axial projection (Ferguson method_ of the lumbosacral junction? 30 to 35 degrees cephalad
What is the central ray centering point for an AP oblique lumbar spine? 2 inches medial to the elevated ASIS and 1 to 1.5 inches above the iliac crest
The condition of the lumbar spine in which there is anterior displacement of one vertebra over another is termed: spondylolisthesis
How many degrees is the body rotated for the AP projection of the sacroiliac joint? 25 to 30
Which zygapophyseal joints are demonstrated on the AP oblique projection of the lumbar spine? Joints closest to the IR
on each side of the Sacral base is a large wing-like mass called the: ala
The central ray angle for an AP axial projection of the coccyx is: 10 degrees caudad
Where is the central ray directed for an AP lumbosacral spine? Iliac crests
How many vertebrae are there in the sacrum? 5
The central ray angle for an AP axial projection of the sacrum is: 15 degrees cephalad
Where does the central ray enter the patient for an AP axial projection of the sacrum? 2 inches superior to the pubic symphysis
which projection of the lumbar spine displays the vertebrae in the form of a "Scottie dog"? 1. Lateral 2. AP Oblique 3. PA Oblique 2 and 3
To demonstrate the zygapophyseal joints of the lumbar spine, MSP of the patient is rotated how many degrees? 45
An alternate method of positioning the central ray for the L5-S1 lateral projection is: parallel with the interiliac line.
Created by: REGJUR4408
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