Findings Lumbar X-ray Flashcards
How is sacral base translation to L5 determined?
Sacral base line to L5
If the sacral base line is behind L5, what is it called?
Retrolisthesis
If the sacral base line is in front of L5, what is it called?
Spondylolisthesis
How is lumbar lordosis determined?
Intersection of the superior and the inferior stress lines
What is the normal range of lumbar lordosis?
33-35 degrees
How is weight bearing determined?
Distance between the GWL and the anterior superior corner of T12
What is the normal distance between the GWL and the anterior superior corner of T12?
0 inches
How is lumbar disc height determined?
Vertebral body height of L3
What is the normal lumbar disc height?
33% of L3 vertebral body height
How is lumbar vertebral body participation determined?
Vertebral body base lines
Where should lumbar vertebral body base lines converge at?
The back of L3 and parallel to the bottom of the film
What is determined by the A-P lumbar x-ray?
Lumbo-sacral angle, Lower dorsal angle and Dorsal lower dorsal angle
How is the lumbo-sacral angle determined?
Unit 5 (L4-L5) compared to the sacrum
What is the normal lumbo-sacral angle?
90 degrees
How is the lumbo-dorsal angle determined?
Unit 5 (L4-L5) compared to Unit 4 (T7-L3)
What is the normal lumbo-dorsal angle?
180 degrees
How is the dorsal-lower dorsal angle determined?
The top half of unit 4 (T7-T12) to the lower half of unit 4 (L1-L3)
What is the normal dorsal-lower dorsal angle?
180 degrees
