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RADT 318 Unit 1

Skull, facial, nasal bones

QuestionAnswer
Fracture of skull that may appear as jagged or irregular lucent lines? Linear Fracture
Fragment of the bone that is separated and depressed into cranial cavity? Depressed Fx
Another name for depressed fracture? Ping-Pong Fx
Fracture through dense inner structures of temporal bone? Basal Skull Fx
Primary malignant neoplasm that spreads to distant sites via blood and lymphatic systems? Metastases
Destructive lesion with irregular margins? Osteolytic
Proliferative bony lesions of increased density? Osteoblastic
Moth eaten appearance from mix of destructive and blastic lesions? Combination Osteolytic and Osteoblastic lesions
Tumors of pituitary glands? Pituitary Adenomas
Enlargement of sella turcica and erosion of dursum sellae? Pituitary Adenoma
Disease of unknown origin beginning as bony destruction followed by repair? Paget’s Disease
Cotton wool appearance with irregular areas of increased density? Paget’s Disease
Bacterial infection of mastoid process? Mastoiditis
Benign tumor most common in middle ear or mastoid region? Cholesteatoma
Benign tumor that destroys bone and can lead to hearing loss? Cholesteatoma
Growth that arises from mucous membranes and projects into a cavity? Polyp
What can cause chronic sinusitis? Polyp
Hereditary disease with excessive spongy bone formation of middle and inner ear? Otoslcerosis
Most common cause of hearing loss without eardrum damage? Otoslcerosis
GAL stands for what Glabelloalveolar Line
MML stands for what? Mentomeatal Line
LML stands for what? Lips-meatal Line
AML stands for what? Acantiomeatal Line
IOML stands for what? Infraorbitomeatal Line
OML stands for what? Orbitomeatal Line
GML stands for what? Glabellomeatal Line
EAM stands for what? External acoustic meatus
What is the CR angle for an AP Axial (Townes Method)? CR 30 degrees caudad to OML
What does the CR enter for Townes Method? 2.5” above the glabella
Where does the CR exit for the Townes Method? Foramen Magnum
Where does the CR enter for a Lateral skull? 2” superior to EAM
Centering point for lateral skull is half way between what two landmarks? Inion and Glabella
What is the CR angle for a PA Axial Cranium (Caldwell)? 15 degrees caudad
What line is perpendicular to the IR for Caldwell? OML
Where does the CR exit for Caldwell? Nasion
Where are the petrous ridges in a PA Caldwell in relation to the orbits? Lower 1/3 of the orbits
Where does the CR exit for a PA Cranium “0” degree? Glabella
Where are the petrous ridges in a PA “0” Cranium? Filling the orbits and superimposing superior orbital region
Where does the CR enter for a SMV projection? 1.5” inferior to mandibular symphysis
What line is parallel to the IR for a SMV projection? IOML
Where does the CR exit for a PA Axial “Haas Method”? 1.5” superior to nasion
What is the angle for the Haas Method? 25 degrees cephalad
What line is perpendicular to the IR for Haas Method? OML
What does the CR enter for a Superoinferior Tangential Nasal Bones? Nasion
What angle is used for the Superoinferior Tangential Nasal Bone view? Angle as needed to make CR parallel to GAL
What line is the IR perpendicular to for the Superoinferior Tangential Nasal Bone? GAL
Where does the CR enter for Lateral Facial Bones? Zygoma
The zygoma is midway between what two landmarks? Outer canthus and EAM
Where does the CR exit for a Parietoacanthial “Waters Method”? Acanthion
What line is perpendicular to the IR for the Waters Method? MML
What line is parallel to the IR in a SMV Zygomatic Arches view? IOML
Where does the CR enter for SMV Zygomatic Arches? 1.5” inferior to mandibular symphysis and middle of two angles
What line is parallel to IR in an oblique inferosupererior zygomatic arches? IOML
What is the alternative angle for a Caldwell cranial projection? 25-30 degrees caudad
Why would you use the alternative angle for Caldwell? To better visualize the entire orbits
What is the alternative projection for patients who cannot flex their necks enough for AP axial Townes Method? Haas Method
What is the technique for an AP Axial Towne Method? 20 mAs 80 kVp
What is the technique for Lateral Cranium? 8 mAs 80 kVp
What is the technique for a PA Axial Caldwell Method? 18 mAs 80 kVp
What is the technique for a PA “0” degree Cranium? 18 mAs 80 kVp
What is the technique for a SMV Cranium? 30 mAs 80 kVp
What is the technique for a PA Axial Haas Method? 20 mAs 80 kVp
What is the technique for a Lateral Nasal Bone? 3 mAs 55 kVp
What is the technique for a Axial Nasal Bone? 6 mAs 60 kVp
What is the technique for a Lateral Facial Bone? 8 mAs 70 kVp
What is the technique for a Parietoacanthial Waters Method- Facial Bones? 18 mAs 80 kVp
Created by: magrissom