su14_-_radiology_exam_1_20141210195314 Flashcards
What is the definition of oral and maxillofacial radiology?
the specialty of dentistry and discipline of radiology concerned with the production and interpretation of images and data produced by all modalities of radiant energy that are used for the diagnosis and management of diseases, disorders, and conditions of the oral and maxillofacial region
What is the definition of radiology?
the art and science of using ionizing radiation in diagnosis and treatment of diseases
What are the 2 subcategories of radiology?
- diagnostic radiology- therapeutic radiology (radiation therapy)
What is the definition of radiography?
the use of radiation to produce an image on a receptor
What is the definition of a radiograph?
the image produced on a receptor by exposing it to x-rays; susequent processing/developing produces a positive image in case of digital radiography and negative-like image on film
What was Wilhelm Conrad Roentgen known for?
discovered x-rays in 1895; first nobel prize in physics in 1901
What was the first radiograph taken of?
Anna Berta Roentgen’s hand
What was Dr. Otto Walkhott known for?
took the first dental radiograph
What was William D. Coolidge known for?
making the “hot cathode ray” tube
What were Sir Godfrey N. Housfield and Dr. Allan Cormack known for?
computed tomography (CT) scans
What was Nikola Tesla and Dr. Raymond Damadian known for?
improving the field strength of MRI and being the “father of the modern MRI,” respectively
What is the difference between a fluoroscope and an “x-ray”?
fluoroscope does dynamic imaging while an x-ray is a static image
Who is known as the “father of radiation protection”?
William Herbert Rollins, D.M.D., M.D.
True or false: About half of the x-ray units in the US are dental.
true
How many dental radiographs are acquired per year worldwide?
300 million
Dental radiographic examinations are second to what type of radiograph in terms of number and cost?
chest radiographs
What are the 2 types of biological effects of radiation?
- deterministic- stochastic
Which effect of radiation has a dose theshold?
deterministic
In which effect of radiation is the severity of response proportional to the dose?
deterministic
In which effect of radiation is the probability of occurence of effects dose dependent (all or none)?
stochastic
Oral changes after radiotherapy is an example of what biological effect of radiation?
deterministic
Radiation-induced cancer is an example of what biological effect of radiation?
stochastic
Radiation-induced mutations is an example of what biological effect of radiation?
stochastic
Radiation sickness after whole body irradiation is an example of what biological effect of radiation?
deterministic