Lumbosacral Junction and Sacroiliac Joints Flashcards
1
Q
- CR: Directed through the lumbosacral joint at an average angle of 30 to 35 degrees cephalad. CR enters about 1.5 inches (3.8 cm) superior to the pubic symphysis.
- 30 degrees in male patients
- 35 degrees in female patient
- With the patient in the prone, CR is directed through the lumbosacral joint to the midpoint of the IR at an average angle of 35 degrees caudad. CR enters the spinous process of L4.
- shows the lumbosacral joint and a symmetric image of both sacroiliac joints free of superimposition.
A
AP / PA AXIAL PROJECTION
2
Q
- LPO position to demonstrate the right joint and the RPO position to show the left joint. The side being examined is farther from the IR.
- Elevate the side under examination approx. 25 to 30 degrees.
- CR: Perpendicular to the center of the IR, entering 1 inch medial to the elevated ASIS
- shows the sacroiliac joint farthest from the IR.
A
AP OBLIQUE PROJECTION
RPO and LPO Positions
3
Q
- RAO position is used to demonstrate the right joint
- LAO position to show the left joint. The side being examined is closer to the IR.
- Adjust the patient by rotating the side of interest towards the radiographic table until a body rotation of 25 to 30 degrees is achieved.
- CR: Perpendicular to the IR and centered 1 inch medial to the ASIS closest to the IR.
A
PA OBLIQUE PROJECTION
RAO and LAO positions
4
Q
method is used to demonstrate the pubic symphysis and the abnormal motion of the sacroiliac joints.
A
PA PROJECTION / CHAMBERLAIN METHOD
(Weight Bearing Method)
5
Q
(AP) position demonstrate the right joint
A
LPO
6
Q
(AP) position demonstrate the left joint
A
RPO
7
Q
(PA) position demonstrate the right joint
A
RAO
8
Q
(PA) position demonstrate the left joint
A
LAO
9
Q
CR angulation of females in AP Axial
A
- 35 degrees in female patient
10
Q
CR angulation of males in AP Axial
A
- 30 degrees in male patients
