Key Terms
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| show | A negatively charged electrode that produces electrons in the x-ray tube.
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| show | A positively charged electrode in the x-ray tube consisting of a tungsten target that produces x-rays when hit with electrons from the cathode.
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| ALARA | show 🗑
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| Kilovoltage Peak (kVp) | show 🗑
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| Heel Effect | show 🗑
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| Radiographic Density | show 🗑
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| show | The current produced by the x-ray tube during an exposure.
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| Contrast | show 🗑
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| Radiolucent | show 🗑
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| show | Will appear white with more dense tissue as it absorbs more radiation.
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| Penumbra Effect | show 🗑
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| Source-Image Distance (SID) | show 🗑
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| Film-Focal Distance (FFD) | show 🗑
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| show | The distance from the object being imaged to the recording surface. (Digital Imaging)
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| Object-Image Distance (OID) | show 🗑
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| Bucky | show 🗑
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| show | Consists of adjustable lead shutters installed in the tube head of the x-ray machine.
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| Focused Grids | show 🗑
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| show | The invisible image in the emulsion of an x-ray film produced after the film has been exposed to light.
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| Anechoic | show 🗑
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| show | Arranges the crystals in concentric rings.
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| show | Is more sensitive to direct x-rays than it is to light.
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| show | Occurs when the sound beam traverses a cystic structure.
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| Echoic | show 🗑
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| show | The films inherent ability to produce shades of gray.
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| show | Used for those patients who visualization of dynamic structures is of importance.
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| Hyperechoic | show 🗑
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| Hypoechoic | show 🗑
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| Intensifying Screens | show 🗑
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| show | Used to describe tissue that appears to have the same echotexture on the screen as surrounding tissues.
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| Maximum Permissible Dose (MPD) | show 🗑
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| Mirror Image | show 🗑
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| show | Rem units are used to express the dose equivalent that results from exposure to ionizing radiation.
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| show | Is the current terminology used to define a rem (1 Sv = 100rem)
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| Slice Thickness | show 🗑
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| show | Means that most of the sound is transmitted to the deeper tissues, with only a few echoes reflected back to the transducer.
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| show | Diagnostic Ultrasound is a noninvasive method of imaging soft tissues.
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| Bisecting Angle Technique | show 🗑
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| show | A radiographic technique in which the film is placed in the mouth parallel to the teeth and the cone is aimed perpendicular to the film and tooth.
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