What is the posterior oblique projection of the cervical spine?
Positioning of the Cervical and Thoracic Spine
| Question | Answer |
|---|---|
| What central ray angulation must be used with a posterior oblique projection of the cervical spine? | 15 degree cephalad angle. |
How do I get the iliac oblique view?
The iliac oblique view is obtained on a supined patient with the unaffected side of the pelvis rotated anteriorly at 45°. The x-ray beam is directed vertically toward the affected hip. It is useful to assess the posterior column and anterior wall.
What is the Norgaard projection?
The ball-catcher view, Nørgaard projection, or posterior oblique view of both hands is an additional projection of the routine hand series.
What is the meaning of oblique projection?
An oblique projection is a parallel projection in which the lines of sight are not perpendicular to the projection plane. Commonly used oblique projections orient the projection plane to be perpendicular to a coordinate axis, while moving the lines of sight to intersect two additional sides of the object.
When positioning for an AP cervical spine projection the patient should be?
B: For the AP view of the cervical spine, the patient is either erect or recumbent. The beam is directed toward the C-4 vertebra (at the Adam’s apple) at an angle of 15°-20° cephalad.
How do you take obturator oblique view?
Obturator oblique view is obtained on a supine patient with the injured side of the pelvis rotated anteriorly at 45°. The x-ray beam is directed vertically toward the affected hip. It is useful to assess the obturator ring, anterior column (iliopectineal line), and posterior wall of the acetabulum.
What is the acetabular teardrop?
The teardrop is located inferomedially in the acetabulum, just superior to the obturator foramen. The lateral lip is the exterior, and the medial lip is the interior of the acetabular wall. The ilioischial line projects over the medial acetabulum only fortuitously on the straight anteroposterior (AP) roentgenogram.
What is the Robert method?
The Robert method demonstrates the carpometacarpal joint of the thumb using the anteroposterior (AP) projection—a view commonly requested by hand surgeons. The method uses a tabletop technique that requires patients to place their hand in a complex position.
Where is the CR centered for an AP pelvis projection?
For an AP axial outlet projection, the CR is angulated cephalad 20°-35° for males and 30°-45° for females and is centered to a point 2 inches (5 cm) distal to the superior border of the pubic symphysis.
How much is the central ray angled for the AP oblique projection Judet method of the acetabulum?
Positioning chpt7
| Question | Answer |
|---|---|
| In relation to the midsagittal plane, the SI joints angle how much? | 25-30 |
| Body is placed in what angle for an AP oblique projection judet method of the acetabulum? | 45 |
| Central ray angle for AP oblique judet method of the acetabulum? | 2” inferior to the ASIS |