Exam I Review Flashcards
What is the name of the device that receives radiation after exiting the patient?
Image Receptor
What is the term for radiation that exits the tube before interacting with anatomy?
Primary Beam
What is another term for the visible image?
Manifest Image
What is another term for the invisible image?
Latent Image
Which interaction is primarily responsible for differential absorption?
Photoelectric
What best describes the process of ionization?
Removal of an Electron
T/F: Scatter radiation provides useful information to the radiographic image.
False
What best describes transmission?
X-rays traveling through patient with no interaction
Which type of tissue has the least attenuation?
Air
Which type of tissue has the most attenuation?
Bone
What refers to the range of exposure intensities an IR can accurately detect?
Dynamic Range
What is the term for the amount of light emitted from a display monitor?
Brightness
What is the numerical value indicating the level of radiation exposure to the image receptor?
Exposure Indicator
What term refers to the absorption characteristics of the anatomic tissues radiographed?
Subject Contrast
The number of pixels per unit area is:
Pixel Density
The distance between the center of one pixel to the next adjacent pixel is the:
Pixel Pitch
What is the unit of measurement for spatial frequency?
Line pairs per millimeter (lp/mm)
What is another name for size distortion?
Magnification
Unwanted, brightness fluctuations on an image is:
Quantum Noise
What causes quantum noise?
Too few x-ray photons reaching IR
Which of the following is a method of describing the strength of the radiation exposure compared with the amount of noise ?
Signal-to-Noise Ratio (SNR)
