Xray - Outcome 1 Flashcards
Roentgen ray
An X-Ray named after Wilhem Roentgen.
Roentgenograph
An image produced on photosensitive film.
Dental radiography
The method of recording images of dental structures by the use of x-radiation.
Dental radiographer
The person who takes the radiograph by positioning, exposing, and processing dental photographic film.
Radiology
The science or study of radiation as used in medicine.
Wavelength
The distance between two peaks of a wave in the same phase.
Frequency
The number of repetitions in a given period of time.
X-Radiation (a.k.a. X-Rays)
A beam of energy that has the power to penetrate substances and record shadow images on receptors (photographic film or digital sensors).
Dental radiograph
A photographic image produced on film by the passage of x-rays through teeth and related structures.
Do X-rays have short or long wavelengths?
The shorter the wavelength and the higher the frequency, the more energy. Because X-rays have a short wavelength with a high frequency they have the energy required to penetrate many materials
Appearance of x-rays
X-rays are invisible energy that cannot be sensed (tasted, heard, felt, or smelled)
Charge
X-rays have no particles therefore they cannot have a charge
Speed of x-rays
X-rays travel at the speed of light (3.0 x 10^8 m/s)
Wavelength
X-rays travel in waves and have short wavelengths with a high frequency
Path of travel
X-rays travel in straight lines and can be deflected, or scattered
Focusing capability
X-rays cannot be focused to a point and always diverge from a point
Penetrating Power of Xrays
X-rays can penetrate liquids, solids, and gases. The composition of the substance determines whether X-rays penetrate or pass through, or are absorbed
Absorption
X-rays are absorbed by matter; the absorption depends on the atomic structure of matter and the wavelength of the X-ray
Ionization capability
X-rays interact with materials they penetrate and cause ionization
Fluorescence capability
X-rays can cause certain substances to fluoresce or emit radiation in longer wavelengths (e.g., visible light and ultraviolet light)
Xrays Effect on receptor
X-rays can produce an image on a receptor
Xray Effect on living tissues
X-rays cause biological changes in living cells