RadPos

5/18/99

Cervical

Open Mouth

• Top line at the bottom of the top teeth (should be at the same level of occiuput)
• Central ray is at the uvula

A-P cervical

• Light at bottom of mandible—slightly incline head
• Central ray at C4 or C5

• 15° cephalic—makes ray go through lower disc planes
• collimate 9 inches tall and just wide enough for soft tissues
• want to include lung apices
• can see uncinate processes
• every thing is the same except mAS b/w the two shots
• object film distance—laterals and obliques are at 72 inches to cut down on magnification
• when move object away from the film magnifies the image

• air gap—

Obliques

• want to see cervical foramina
• left posterior looks at the right foramina and angle the tube up
• left anterior looks at the left foramina and angle the tube down
• posterior—marker in front of the spine under the chin at the extreme edge of film
• top of the light is hitting on the ear lobe
• bottom of the light is below the clavicle
• have body at a 45° angle
• rotate the head slightly (half way to parallel to the film)
• can use this view to look at the peducle on the opposite side
• can see everything on this view

Lateral

• spot film
• arm against bucky is straight up
• central ray at C5 – C7
• what you could not see before
• try 80Kvp at 40 inches
• george's line—at the back of the vertebral body

flexion

• retract the head
• drop head down