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Radt 1300
study guide test 1
| Question | Answer |
|---|---|
| atomic number | the number of nuclear protons in an atom unique to each element; also know as z number. |
| atomic weight | the mass of an atom of an element; specifically the average mass of an atom of an element as it occurs in nature that is expressed in atomic mass. |
| matter | anything that has mass and takes up space. |
| radiology | the study of x-ray |
| radiograph | image of an x-ray |
| kilovoltage | the electrical difference between the anode and cathode of the radiographic tube. In radiography the x-ray tube peak voltage during an exposure is measured in kilovolts. |
| diode | 2 electrons one positive and one negative. |
| volt | unit of electrical force, needed to push a current (flow of electrons) unit of potential difference. |
| frequency | the number of waves that passes a particular point in a given time frame. Second hertz #of cycles |
| wavelength | the distance between two successive (identical) points on a wave. Distance traveled |
| intensity | exposure rate per unit area. |
| Who discovered x-rays and when? | Wilhelm Conrad Roentgen, November 8, 1895 |
| energy (electrons) | very high in waves and related to frequency. |
| velocity | frequency x wavelength |
| ems | electromagnetic spectrum |
| IR | image receptor |
| sid | source to image receptor distance |
| kVp | kilovoltage |
| cr | computed radiography |
| what is the difference between a radiologist and a radiographer? | A radiologist is a doctor who is specially trained to interpret diagnostic images. A radiographer takes the x-rays and also conducts diagnostic tests. |
| what are the two main distances used in a x-ray department? | 40'' and 72'' |
| why should the term technician never be used? | Because it means some one who is trained in one task |
| where on the electromagnetic spectrum do x-rays fall? | the high side |
| explain the relationship between frequency and wavelength. | inversely proportional |
| explain the relationship between photons and frequency. | directly proportional |
| name the types of energy. | kinetic and electromagnetic |
| when x-rays are produced, how much heat and how much x-ray is produced? | 99% heat and 1% x-ray |
| explain the dual particle theory of x-ray. | travels through space as a wave |
| who determined the mathematical equation used to describe the relationship between photon energy and frequency? | max planke |
| what does kev mean? | kilo electron volts |
| electrons travel from to in x-ray production. | negative to positive |
| when x-rays are absorbed prior to reaching the image receptor, what happens as far as the image is concerned? | creating white on the image |
Created by:
Dawn6585
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