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RADT 318 Unit 1
Skull, facial, nasal bones
| Question | Answer |
|---|---|
| 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
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