Across
- 2. Radiation The ejected electron resulting from the Compton interaction. Also known as the Compton electron. Scattered reaction produced within the subject being radiographed.
- 5. The flexible plate inside the computed radiography cassette that receives the remnant radiation and converts it by means of a photostimulable phosphor into an image that can be read by a laser.
- 6. The smallest component of the matrix—a picture element
- 7. Unsharpness resulting from patient motion.
- 10. The fully shaded inner region of a shadow cast by an opaque object
- 11. The process of heat supplied to the cathode resulting in electrons energized off the cathode filament
- 12. The ratio of the height of the lead strips to the distance between them
- 14. A device used to numerically determine the amount of blackness on the radiograph
- 15. The x-ray tube current during an exposure
- 16. Accidental or unintentional image on a radiographic image.
- 18. A material, such as concrete or lead, which absorbs radiation or prevents the transmission of radiation. Radiation protection may be in the form of a leaded apron, lead in the walls of the x-ray room, and/or a leaded screen
- 19. The potential difference applied to the x-ray tube that determines the speed at which the electrons in the tube current move.
- 20. A device that is used to measure x-ray exposure.
Down
- 1. A positively charged electrode within the x-ray tube. Composed of molybdenum, copper, tungsten and graphite
- 3. The process of restricting the size and shape of the x-ray beam to reduce patient exposure and improve image quality.
- 4. a device that energizes the electrical circuit that produces x-rays based upon the technical factors chosen by the operator. It is also a device that converts mechanical energy into electrical energy.
- 8. Electromagnetic radiation that has neither mass nor electric charge but interacts with matter as though it is a particle; x-rays and gamma rays
- 9. Towards the apex or tip of the root of a tooth
- 13. The reduction in intensity of the x-ray beam as it passes through matter due to absorption and scattering.
- 17. surface will not absorb radiation. Air, carbon , and nitrous oxide may be used as negative contrast in radiographic studies as they will appear black on an image (from Latin radiare [to emit rays] + lucere [to shine]).