L-spine Anatomy
L-spine Images
Sacrum/Coccyx Anatomy
Positioning/Projections
Positioning/Projections Con't
100
The intervertebral foramen are situated __ degrees relative to the midsagittal plane.
90o
100
Name the anatomy labeled B.
Lamina
100
Small tubercles that represent the inferior articular processes projecting inferiorly from each side of the fifth sacral segment.
Sacral horns
100
Oblique SI Joints: to demonstrate the inferior or distal part of the joint more clearly, the CR may be angled __ to __ degrees caudad/cephalad.
15 to 20, cephalad
100
Spondyloisthesis involving L4-L5 or L5-S1 and other L5-S1 pathologies are best seen on this position.
Lateral L5-S1 or spot
200
The zygapophyseal joints form an angle open from ___ degrees to ___degrees to the midsagettal plane.
30o to 50o
200
Name the anatomy labeled F.
Pedicle
200
Large masses of bone lateral to the first sacral segment
Alae or wings
200
CR angle for AP axial coccyx
10o caudad
200
On a lateral Lspine, a patient with a wider pelvis and a narrow thorax may require __ to __ degree caudad/cephalad angle even with support.
5 to 8; caudad
300
The portion of each lamina between the superior and inferior articular proccesses.
pars interarticularis
300
Name the anatomy labeled C.
Spinous Process
300
The most posterior aspect of the sacrum that is formed by fused spinous processes of the sacral vertebra.
Median sacral crest
300
Clincial indication for lateral hyperextension and hyperflexion of Lspine.
Assessment of mobility at a spinal fusion site.
300
How much rotation of the patient is required for an oblique Lspine (mainly for L3 and L4)?
450
400
The upper or proximal lumbar vertebrae are nearer the ___ degree angle and the lower or distal lumbar vertebrae are nearer ____degrees.
50o; 30o
400
Name the anatomy labeled E.
Intervertebral foramina
400
The anterior ridge of the body of the first sacral segment helps form the posterior wall of the inlet of the true pelvis is termed________________________.
Promontory of the sacrum
400
CR for AP axial sacrum: Angle CR ___ degrees caudad/cephalad. Direct CR __inches superior to _____ _____.
15o ;cephalad; 2 inches; pubic symphysis.
400
If the area of interest is L5-S1 on an oblique Lspine, how much does the patient need to be roatated?
300
500
The pars interarticularis is best demonstrated on which lumbar image/position?
oblique lumbar
500
Name the anatomy labled E.
Superior articular process
500
The broader superior portion of the coccyx.
Base
500
A PA rather than an AP is highly recommended when doin a scoliosis series; studies have shown that this projection results in approximately __% reduction in dosage to the breasts.
90%
500
On an AP projection of the Lspine what can be done to straigten the spine and open the intervertebral disk spaces?
Partial flexion of the knees