Positioning
Midsagittal plane of the patient's head is parallel to the plane of the IR
The IOML is paralell with the long axis of the table or IR
What is the lateral projection of the skull?
Skull suture located between the parietal bones
What is sagittal?
Tumor arising from the pituitary gland usually in the anterior lobe
What is pituitary adenoma?
The head is placed parallel to the plane of the IR for a lateral position of the skull
What is the midsagittal plane?
Entire cranium with no rotation with superimposed orbital roofs, and greater wings of the sphenoid.
Superimposed TMJS
Superimposed sella turcisa in profile
What is the lateral projection of the skull?
The CR is directed to exit the nasion at a caudal angle of 15 degrees
What is PA axial projection (Caldwell)?
The number of bones that make up the skull
What is 14?
one frontal, one occipital, one ethmoid, one sphenoid, left and right temporal, left and right parietal
Tumor compose of bony tissue
What is osteoma?
The central ray angle for the PA Axial Caldwell projection of the skull
What is 15 degrees?
Symmetric petrous ridges
MSP of cranium aligned with long axis of the collimated field
Orbits filled by the petrous ridges
What is PA projection of the skull
The patient is supine on the table with the midsagittal plane of the body center to the gride. The OML is perpendicular to the IR and the CR is directed to the nasion at an angle of 15 degrees cephalad.
What is the AP axial projection of the skull?
Cranial bones are rigidly joined together by articulations
What are sutures?
Malignant neoplasm of plasma cell involving the bone marrow and causing destruction of the bone
What is multiple myeloma?
The central ray and center of the IR position for a lateral projection of the skull
What is 2" above the EAM?
Dorsum sellae and posterior clinoid processes visible within foramen magnum
bony detail of occipital bone and surrounding soft tissues
Symmetric petrous ridges
What is the AP Axial projection (Towne Method)
The patient is supine on the table with the CR directed through the foramen magnum at an angle of 30 degrees to the OML
What is the AP axial Towne Method?
Skull suture that is found between the frontal and parietal bones
What is coronal suture?
Irregular or jagged fracture of the skull
What is linear?
Examination of the skull will demonstrated the petrous ridges in the orbits, the ethmoid and front sinuses, and crista galli
What is the Caldwell Method?
IOML is parallel to the IR
Mental protuberance is superimposed over anterior frontal bone
Bony details of the cranial base and surrounding tissue
What is the submentovertical Projection (Schuller Method)
CR is directed at an angle of 25 degrees to the OML to enter 1 1/2" below the external occipital protuberance and exits 1 1/2" superior to the nasion
What is the HAAS Method?
Two arched ridges that correspond in position to the eyebrows
What are the superciliary arches?
Bilateral horizontal fracture of the maxillae
What is Le Fort?
Infraorbitomeatal line is placed perpendicular to the IR during an axial (Townes) projection of the skull
What is 37 degrees?
Petrous ridges lie in the lower third of the orbits
Entire cranium perimeter showing thee distinct areas of squamous bone
What is the AP axial projection (Reverse Caldwell)