Quiz 3: L-spine
Terms in this set (29)
How is the thorax centered for a lateral thoracic spine?
Center the oosteriotbhalf of the thorax to the center of the grid
To what level of the body should the CR be directed for a lateral projection if the thoracic vertebral column?
Inferior angle if the scapula (T7)
Which projection best demonstrates the intravertebral foramina of the thoracic vertebral column?
Which Z-joint are best demonstrated with an LPO position of the thoracic spine?
when performing an AP t-spine it is best to pull the patient's head to the left (anode) side?
Anode side is the strongest, less focal spot blur
The lateral position of the thoracic spine best demonstrates the intravertebral foramina?
With reference to the patient where should the top of the IR be position for the AP projection of the thoracic vertebral column?
1 1/2-2 above the top of the shoulders
What is the average obliquity for the thoracic spine exam?
20 degrees from true lateral
For the AP projection of the t-spine, and the patient in a supine position, why should the hips and knees be flexed?
To reduce dorsal kyphosis
What vertebrae are visualized on a swimmers view
C7, T1, T2
Which projection best demonstrated the Scottie dog for the L-spine
AP L-spine opens intervertebral joints spaces better than PA projection
PA would open the intervertebral joints space better
Which plane of the body should be centered to the midline of the table?
CR degrees for a lateral L-spine with parallel vertebral column to the table?
Which vertebral structures are best demonstrated if a supine patient is rotated 45 degrees with the right side elevated and a perpendicular central Ray is directed at the lumbar vertebrae?
Z-joints of the left side
What positioning error most likely occurred if the z-joint is not well demonstrated and the Pericles is quite anterior if the vertebral?
The patient was not rotated enough
The knees and hips should be extended for an AP projection of the L-spine
Z-joints demonstrated on an AP oblique projection of L-spine?
Joints closest to the IR
Z-joints seen on a LAO position of the L-spine?
What lumbar anatomy should be demonstrated with the lateral lumbar projections?
At what level is the 14x17 IR centered for an AP lateral lumbrosacral spine?
Iliac crest bc it is the big size (clue: lumbralsacral)
The lumbar only would be 1-2" above crest
When the CR heads to be angled for the L5-S1 shot, how many degrees and in what direction for females & makes?
8 degrees females caudad
5 degrees males caudad
Doing what will prevent the ACE detector from prematurely terminating the exposure during lateral lumbar?
Placing a sheet of lead rubber on table, behind patient
Placing a lead blocker mat behind the patient for lateral lumbar spine position improves image quality
Same for t-spins
What is the average obliquity for the lumbar spine exam?
Tip: T-spine is 70 degrees or 20 degrees from true lateral
Demonstrating the "Scottie dog" means the lumbar intravertebral foramina are open and well demonstrated
You see the z-joints
Where should the perpendicular CR enter the patient for a L5-S1 shot?
2 posterior, 2 inferior of iliac spine (double check)
Breathing instructions for L spine?
Suspend on expiration
What level of the spine are these landmarks on?
lower costal margins
Prominence of greater trochanter
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