AP Odontoid Fuchs Method
What is the proper patient positioning for the AP Odontoid Fuchs Method?
What does the AP Odontoid Fuchs method demonstrate?
What is the proper patient positioning for the AP Axial Projection of the cervical spine?
Pt. Supine or Erect with neck extended slightly
What is demonstrated?
An AP projection of the lower 5 cervical vertebrae
What is the patient positioning?
Patient Supine or erect, head and body rotated 45 degrees
When is the AP Odontoid Fuchs Method used?
Used when dens upper half us not clearly shown on open mouth
What collimation should be used for the AP Odontoid Fuchs method?
Close collimation
What is the reasoning for the neck being slightly elevated?
Prevents the chin from superimposing the mid-cervical region
What should be visualized?
Area from C3-T2
What is the CR direction and intersection point?
CR 15-20 Degrees cephalad to C4 (thyroid cartilage)
What is the CR Intersection and direction for the AP Odontoid Fuchs Method?
CR perpendicular to midpoint of IR, enters neck on MSP just distal to tip of chin
Center to MSP (midline of IR)
What should be demonstrated in the AP Odontoid Fuchs Method of the Cervical Spine?
Entire dens within the foramen magnum
What is the CR direction and intersection point for the AP Axial Projection of the cervical spine?
CR 15-20 degrees cephalad to C4 (thyroid cartilage)
What should be open?
Disk spaces
For comparison
When should you not attempt the AP Odontoid Fuchs Method?
When a fracture or degenerative disease is suspected
How do you know there is no rotation of the head or neck on the AP Odontoid Fuchs Method?
Symmetry of mandible, cranium, and vertebrae
What SID can be used for the AP Axial Projection of the cervical spine?
40" or 72" SID
What is this projection used for?
Used to demonstrate presence or absence of cervical ribs and to demonstrate transverse processes
What is the reasoning for elevating the chin?
So the mandible doesnt overlap the spine
What should be vertical in the AP Odontoid Fuchs Method?
Tip of chin and mastoid tip
What is the other name for the Odontoid Process?
The dens
Light should be extended up to where?
Top of ear
To top of ear
How much is the patient rotated?
45 degrees