| Term | Definition |
|---|
| Ionizing radiation | The portion of the EM spectrum that is capable of removing orbital electrons from matter with which it interacts; requires higher energy (short wavelength, high frequency); i.e. x-ray and gamma |
| Origin | Only difference between x-ray and gamma is their ______ |
| X-ray | Emitted from the electron cloud of an artificially stimulated atom; usually produced in electrical machines |
| Gamma | Comes from the nucleus of a radioactive atom |
| Radiolucent | Structures that attenuate x-rays only to a small degree, e.g. air, soft tissue |
| Radiopaque | Structures that absorb x-ray to a greater degree, e.g. bone |
| Intensity | A property of EM radiation that decreases with distance from the source; mathematically expressed as the Inverse Square Law |
| Inverse square law | Radiation intensity is inversely proportional to the distance squared from the source |
| X-ray | A form of EM energy waves which have the power to penetrate material and form an image of that material on a photographic emulsion |
| invisible, highly | X-rays are _________ and ______ penetrating. |
| physiological, effects | X-rays have _____________ (chemical and biological) ________ on living tissue. |
| ionizing action | X-rays have an ________ ______ on air; this helps us to measure x-radiation |
| photographic effect | X-rays have a ____________ _______ on film emulsion; basis for all radiograhy |
| fluorescent effect | X-rays have a ___________ _______ on certain crystals; causes grat advancements in x-ray thru I.S. screens and fluoro screens (how x-rays were discovered) d |
| secondary, scatter | X-rays produce _________ and _______ radiation, which is undersirable. |
| neutral | X-rays are electrically _______. |
| heterogeneous | X-rays have _____________ wavelengths; different wavelengths |
| heat | X-rays liberate a small amount of ____ on passing through matter. |
| straight line | X-rays travel in a ________ ____. |
| speed of light | X-rays travel at the _____ __ _____. |
| focused | X-rays can not be _______. |
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