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83 Cards in this Set
- Front
- Back
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What disease could be classified as a punctuate and globular "Fruit-laden branchless trees" when viewed with Sialography?
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Sjorgrens
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What radiographic method is best to evaluate obstructive and inflammatory lesions of major salivary glands?
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Sialography
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What are two types of solutions that can be used in Sialography?
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Fat-soluble contrast agents (Ethidol)
Water-soluble contrast agents (Sinografin) |
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What are the radiolucent filling voids seen in sialography?
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Sialoliths
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What is the term for the "string of sausage" look in a Sialography?
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Sialodochitis
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What radiographic method has made it possible to assess the presence/absence of lymph node metastases with considerable certainty?
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Computed Tomography (CT)
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What type of radiographic method would be used to view:
Extensive lesions in the mandible or maxilla with sinus involvement Suspected malignancy Osseous lesions affecting the TMJ Assessment of maxillofacial trauma Pre-surgical implant planning? |
Computed Tomography (CT)
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If radiation dose is a concern when planning an implant, what alternative method of radiography could be used in place of a CT?
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Complex motion tomography
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What is usually in the detector of CT Radiography?
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Xenon Gas-Filled Ionization Chamber
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About how many times more sensitive is CT than plain film systems?
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100x
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What is considered to have a neutral density (0) in CT imaging?
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Water
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How can a tumor be dected in marrow with CT imaging?
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By the change in CT number. (Normal marrow contains fat which has a number range of -20 to -40. A tumor would increase the density into the + range.)
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What is taken at the start of a CT imaging study?
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Scout Image
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What facilitates spatial localization of the final slices of a CT image?
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Scout Image
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What disease would look like ground glass texture with specks of calcification in the bone on a CT?
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Cemento-Ossifying Fibroma
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What method of advanced imaging shows soft tissue better than CT?
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Magnetic Resonance Imaging (MRI)
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Is MRI useful in examining bony lesions?
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No
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What does MRI signal strength depend on?
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Hydrogen Content of Tissue
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Which weighted image of an MRI would show fat as bright and cystic fluid as dark?
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T1-weighted
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What is an absolute contraindication in the use of MRI?
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Any implanted ferromagnetic devices (pacemakers, aneurysm clips, prosthetic joints or heart valves, hearing aids, IUDs, etc)
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What contrast solution is commonly used with MRI?
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Gadolinium
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What type of advanced imaging uses a radiopharmaceutical and a gamma camera?
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Nuclear Medicine
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What is the radiopharmaceutical of choice for the study of bone and salivary gland?
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Technetium
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What would a "hot spot" indicate when viewing radiation release from an injection of technetium?
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Areas of increased metabolic activity or osteogenesis
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What type of imaging is characterized by high sensitivity but low specificity?
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Nuclear medicine
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What salivary gland neoplasm is an exception to the rule that they do not concentrate radiopharmaceuticals?
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Warthin's tumor
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What type of advanced imaging is best suited to providing information about body cavities?
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Ultrasound
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What could you use Ultrasound for?
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Assessment of sinus disease
Assessment of extracranial carotid vasculature Assessment of salivary gland or thyroid masses |
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Which type of CT uses less radiation?
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Cone Beam
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Which type of CT has more resolution?
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Multi-Detector CT
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What are craniofacial imaging applications for ConeBeam CT?
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Infection, trauma, developmental deformities
Presurgical implant analysis Pre-surgical anatomic landmark assessment TMJ evaluation Sinus disease Airway space analysis Orthodontic considerations |
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How would you describe the numerical distribution of one lesion?
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Solitary or Focal
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What type of numerical distribution refers to multiple lesions with only one jaw involved?
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Diffuse
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What type of numerical distribution refers to multiple lesions in at least three quadrants of the jaws, both the mandible and maxilla?
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Generalized
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What type of numerical distribution refers to lesions that occur in the same location in the right and left side of a jaw?
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Symmetrical
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What is the most important radiographic pattern of a lesion?
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Borders
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What descriptors are used to describe the borders of radiographic lesions?
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Well-defined
Sclerotic, Well-Corticated Punched-Out Radiolucent Rim around Radiopaque Lesion Ill-Defined, Poorly Marginated Ragged, Moth-Eaten |
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What type of radiographic border has a white radiopaque line around the outside of the lesion?
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Sclerotic, Well-Corticated
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What type of radiographic border do you commonly see in multiple myeloma and Langerhan's cell histiocytosis?
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Punched-Out
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What type of border would a lesion with a soft tissue capsule exhibit?
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Peripheral Radiolucent Rim around a Radiopaque Lesion
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What does the presence of ragged, moth-eaten borders indicate?
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Presence of severe inflammatory disease or malignant neoplasia
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What are three common geometric shapes used to describe radiographic lesions?
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Round/Ovoid
Scalloped Irregular |
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What type of geometry is associated commonly with simple bone cysts and odontogenic keratocysts?
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Scalloped
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Where would an odontogenic lesion typically originate?
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Superior to the IAN canal
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What type of lesions arise in the cancellous bone of the jaw?
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Central lesions
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What type of lesions arise at the alveolar crest?
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Peripheral Lesions
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What type of lesions arise in the periosteal compartment of bone?
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Periosteal lesions
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What type of lesions arise around the crown of an impacted tooth?
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Circumcoronal
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What type of lesions develop around the apex of a tooth?
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Periapical
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What type of lesions arise between tooth roots?
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Interradicular Lesions
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What type of radiographic description applies to radiolucencies only?
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Architecture
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How would a radiolucency with only one compartment or locule be classified?
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Unilocular
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How would multiple compartmented radiolucencies be classified?
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Multilocular
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Between multilocular and unilocular radiolucencies, which has the higher recurrence rate?
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Multilocular
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What type of multilocular radiolucency appear as overlapping compartments?
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Soap Bubble
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What type of multilocular radiolucency appear as small uniformly sized compartments?
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Honeycomb
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What type of radiolucent pattern usually indicates the presence of ameloblastoma and intraosseous hemangioma?
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Honeycomb
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What type of multiocular radiolucency show septae radiating from a central body?
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Spider Web
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What type of multiocular radiolucency shows septae aligned at right angles to eachother?
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Tennis Racket
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What disease exclusively exhibits a Tennis Racket type of multiocular radiolucency?
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Odontogenic Myxoma
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What type of description is used to describe radiopacities exclusively?
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Texture
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What are descriptions used when describing radiopaque textures?
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Homogenous
Multilobulated Ground Glass Orange Peel Cotton Wool |
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What type of texture would be seen in Paget's disease?
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Cotton Wool
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What are ways that a lesion can affect teeth?
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Root Divergence
Floating in Air Tooth Root Resorption by Blunt Pressure Circumferential Root Resorption |
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What type of neoplasm would cause an onion skinning type of periosteal reaction?
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Ewing's Sarcoma
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What type of conditions produce a periosteal reaction known as hair on end?
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Sickle Cell Anemia and Thalassemia
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What are two mechanisms of calcification?
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Dystrophic
Metastatic |
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Which mechanism of calcification is hypercalcemic and occurs in normal tissue?
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Metastatic
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What mechanism of calcification is normocalcemic and occurs in dead, dying, diseased, damaged or degenerating tissue?
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Dystrophic
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Which duct/gland has a higher chance of having a sialolith?
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Submandibular duct and gland
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Where are rhinoliths found?
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In the nose
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Where are antroliths found?
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In Maxillary Sinus
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Where are phleboliths found?
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In veins and capillaries
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Which type of hemangioma can be heard?
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Cavernous hemangioma (capillary hemangioma only provides a minimal high to low shunt)
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Where is a calcified atherosclerotic plaque often seen radiographically?
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C3-C4 above or below hyoid bone
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Which carotid artery is affected in Carotid Artery Syndrome if there is pain on turning head, otalgia, vertigo, tunnitus, otitis media?
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External Carotid Artery
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What are the symptoms produced when the Internal Carotid Artery is affected by Carotid Artery Syndrome?
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Syncope when head is turned
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What is the name for an extraskeletal benign bone-producing neoplasm?
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Intraoral Osseous Choristoma
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What is the calcification that comes from a tapeworm infection?
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Cysticercosis Cellulosae
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What type of calcification is a troubling complication of dermatomyositism, scleroderma, and Raynaud's disease?
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Calcinosis cutis
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What metastases is most common in causing calcifications?
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Prostate
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What are two meniscal replacements of the TMJ that can cause calcifications?
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Silastic and Proplast
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What disease would have no connection between a lesion of the TMJ and the condylar head?
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Osteochondromatosis
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