Radiographic Positioning CH 9, 15-16
To reduce distortion of the intervertebral joint spaces of the lumbar spine for an AP projection, an SID of _____ inches is suggested. - Answer- 48
What projection and position are demonstrated in the image below? - Answer- Lateral, left lateral in hyperfl...
Radiographic Positioning CH 9, 15-16
To reduce distortion of the intervertebral joint spaces of the lumbar spine for an AP
projection, an SID of _____ inches is suggested. - Answer- 48
What projection and position are demonstrated in the image below? - Answer-
Lateral, left lateral in hyperflexion
Where should the center of the IR be positioned for the "open mouth" AP projection
of the atlas and axis? - Answer- Second cervical vertebra
The intervertebral foramina of the cervical spine open - Answer- 45 degrees
anteriorly and 15 degrees inferiorly.
Where is the central ray directed for a PA axial oblique projection of the cervical
intervertebral foramina? - Answer- Fourth cervical vertebra
If the lumbar spine cannot be adjusted so it is horizontal for the lateral projection, the
central ray should be angled - Answer- 5 degrees men, 8 degrees women, cephalad.
What is the central-ray centering point for an AP oblique lumbar spine? - Answer- 2
inches medial to the elevated ASIS and 1 to 1.5 inches above the iliac crest
Where does the central ray exit for the AP axial oblique projection to demonstrate
the cervical spine pillars and laminae? - Answer- C7
The short, thick processes that project posteriorly on each side of a vertebral body
are called the - Answer- pedicles.
The intervertebral foramina of the thoracic spine form an angle of how many degrees
with the midsagittal plane? - Answer- 90
The superior and inferior articular processes of the cervical spine form thick columns
called the - Answer- articular pillars.
If a lead rubber sheet is not placed on the table when performing a lateral projection
of the thoracic spine, the image may be - Answer- underexposed.
To demonstrate the zygapophyseal joints of the lumbar spine, MSP of the patient is
rotated _____ degrees. - Answer- 45
What is the central-ray angle for the AP axial projection (Ferguson method) of the
lumbosacral junction? - Answer- 30 to 35 degrees cephalad
Which projection of the lumbar spine displays the vertebrae in the form of a "Scottie
dog"? - Answer- 2 and 3
At birth, how many vertebrae make up the vertebral column? - Answer- 33
, For the AP axial L-Spine radiograph, which of the following demonstrates no rotation
on the image? (Select all that apply.) - Answer- Sacroiliac joints equidistant from the
vertebral column
Spinous processes equidistant to the pedicles
Symmetric vertebrae
Which projections of the cervical spine will demonstrate the lower five
zygapophyseal joints of the cervical spine? - Answer- 1, 2, and 3
An abnormal increase in the convexity of the thoracic spine is termed - Answer-
kyphosis.
A radiograph of an AP open-mouth C-spine projection reveals the base of the skull is
projected over the dens. What positioning error led to this radiographic outcome? -
Answer- The neck was hyperextended.
What anatomy is labeled with the letter C in the image below? - Answer-
Intervertebral disk space of C6-C7
One fourth of the length of the vertebral column is made up of the - Answer-
intervertebral disks.
The central-ray angle for an AP oblique sacroiliac joint is - Answer- 0 degrees.
For which projection is the patient instructed to softly phonate "ah" during the
exposure? - Answer- AP "open mouth" atlas and axis
The vertebral foramen of the first cervical vertebra contains the - Answer- 1 and 3
Which two breathing techniques can be used for a lateral projection of the thoracic
vertebrae? (Select all that apply.) - Answer- Suspended respiration
Quiet breathing
How much is the body rotated from the lateral position to demonstrate the
zygapophyseal joints of the thoracic region? - Answer- 15 to 20 degrees
What anatomy is labeled with the letter D in the image below? - Answer- C7
The central-ray angle for an AP axial projection of the sacrum is - Answer- 15
degrees cephalad.
Where is the central ray directed for a lateral thoracic spine? - Answer- Level of T7
The second cervical vertebra is called the - Answer- axis.
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