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Tri 3: DXI Exam 1 - My Lecture Notes (6/15)
Spinal Roentgenometrics Quiz & Lecture Notes,
Terms in this set (55)
spread of the atlas
AKA for Atlantoaxial alignment "Overhang" Sign
This picture is an example of what type of fracture @ C1?
AKA Predental interspace, Atlas-odontoid space, Atlas-dens interval
The distance measured is between the posterior margin of the anterior tubercle of C1 and the anterior surface of the odontoid process.
The line drawn between the basion and the opistion is called ____________.
foramen magnum line
Another name for McRae's line?
lateral skull or lateral cervical neutral
What is the best view to see a McRae's line/Foramen magnum line?
to determine whether the odontoid process crosses the line
What is the purpose of McRae's line?
Basilar impression / Invagination
If the dens crosses McRae's line it would be called _______________ ______________.
The cervical prevertebral (retropharyngeal) soft tissue at the level of C2 should measure no greater than _________ mm.
Spinal stenosis in the cervical spine is suggested when the sagittal dimension measures less than ______ mm.
The presacral space should NOT exceed more than ____ cm in adults.
The sagittal spinal canal dimension measurement of the lumbar spine, using Eisenstein's method, has minimum measurement of ______ mm.
Which of the following is commonly used in the grading and evaluation of spondylolisthesis?
When utilizing Chamberlain's line, a measurement greater than or equal to _____mm is definitely abnormal.
A line constructed from the posterior margin of the hard palate to the posterior aspect of the foramen magnum.
Another name for Chamberlain's line?
lateral skull and lateral cervical neutral
What are the best views of film to see Chamberlain's line?
A line drawn from the posterosuperior margin of the hard palate to the most inferior surface of the occipital bone.
AKA for McGregor's line
An odontoid process should not lie above the McGregor's Line _______ mm in males and ______ mm in females.
On the lateral lumbar projection, a line is drawn along the sacral base. A second line is drawn perpendicular to the first line at the anterior margin of the sacral base. This line is called ___________.
Narrowing of the sagittal canal dimension is suggestive of __________.
neoplasm or syringomyelia
Widening of the sagittal canal dimension may be suggestive of ___________ or ___________.
CT or MRI
Spinal stenosis is best assessed using axial images on _____ or _____.
AKA: Canal-to-body ratio
This method uses the ratio of the diameter of the cervical canal to
the width of the cervical body.
A normal Trog-Pavlov's ratio is neraring _____. A ratio less than _______ is an indicator of spinal stenosis.
Angle of the cervical curve is normal between _________ degrees.
Cervical Gravity Line
From the Dens down through C7. If it is anterior to C7 it shows anterior weight-bearing
Thoracic Cage Dimension
AKA: Straight back syndrome evaluation
Landmarks: The distance between the posterior sternum and the anterior surface of the T8 body is measured.
Male = 11-18cm
Females = 9-15cm
What is the normal range for male and females of the thoracic cage dimensions.
If the measurement is ___cm in males; ___cm in females suggestive of straight
back syndrome in a Thoracic Cage Dimension.
AKA Lumbar curve or lumbar spinal angle
A line is drawn through and parallel to the superior endplate of L1. A second line is drawn through the superior endplate of S1. Perpendiculars are then created and the angle at their intersection is measured.
What is the average lumbar lordosis that is considered normal?
An oblique line is drawn through and parallel of the sacral base. A second horizontal line is drawn parallel to the bottom of the edge of the film/image. Measure the resultant angle.
AKA Sacral base angle, Fergusion's angle
An increase in the lumbosacral disc angle >15 degrees has been linked to low
back pain caused by ____________.
b/w 10-15 degrees
What is the normal degree of a Lumbosacral Disc Angle?
Which line is considered the most accepted method for measuring a scoliotic spinal deviation?
Max: 15; 18
The sagittal dimension of the thoracic cage, measured on a lateral chest radiograph between the posterior surface of the sternum and the anterior margin of T8 should be at least ______ cm in females and ______ in males.
The cervical prevertebral (retrotracheal) soft tissue at the level of C6 should normally measure less than ___________ mm.
Which radiographic line is utilized to assess proper alignment and possible ligamentous instability?
AKA: Posterior vertebral line or posterior vertebral alignment line
lateral cervical, lateral throacic or lateral lumbar
What are the different radiographic view we can see George's line?
Anterior third of Sacral Base
The lumbar gravity line would normally pass through the ______________________.
Which radiographic line is utilized to asses anterior or posterior displacement from levels C1-C7?
Lateral cervical spine (neutral, flexion, extension)
What radiographic views are best to see the spinolaminar line?
The cervical Jackson's stress lines in flexion should intersect the __________ intervertebral disc space.
16 X 12
Minimum: 5 x 4
The maximum measurement for the sella turcica is ________.
The maximum measurement for the atlantodental interspace in adults is _____ mm and _____ mm in children.
Kohler's line is used to measure which condition?
A verticle line drawn from the apex of the odontoid process should normally pass thorugh the anterior superior margin of which cervical segment?
The curvilinear line drawn at the posterior aspect of the vertebral bodies is called ______________ line.
A Martin's basilar angle measuring more than ______ degrees would suggest the presence of platybasia.
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