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RAD Questions 7-11
| Question | Answer |
|---|---|
| The process by which a beam of x-ray photons is reduced as it passes through matter is known as: | Attenuation |
| Computed radiography (CR) uses which of the following as its image receptor? | photostimulable phosphor plate |
| The factor that controls the amount of x-radiation produced by the x-ray tube is: | kilovoltage peak |
| What mAs value would result using the 500 mA setting at 0.25 second? | 125 mAs |
| Which of the following image receptor systems does NOT use light during exposure? | direct conversion DR |
| A radiograph is made using 40 mAs at a 40-inch SID. If the image must be repeated at a 72-inch SID, what mAs value is necessary to maintain the same exposure? | 130 mAs |
| The 15% rule helps to explain the effect of _____ on exposure. | kilovoltage peak |
| Which of the following is NOT a radiographic contrast medium? | water |
| The most common cause of radiographic unsharpness is: | motion |
| What term in digital imaging is used to describe a numeric representation of the quantity of exposure received by a digital image receptor? | exposure indicator |
| The component of the radiographic system that produces radiation is the: | x-ray tube |
| The selection of radiographic exposure factors such as mAs and kVp is performed at the operator: | control console |
| The quantity of electrons for x-ray exposure is determined by the mAs. This is calculated by: | multiplying the milliamperage by the exposure time |
| The primary components of the x-ray tube important to x-ray production are the: | anode and cathode |
| The component that controls the size and shape of the x-ray exposure field is the: | collimator assembly |
| True digital image receptors are referred to as: | flat panel detectors |
| All of the following are typical features of radiographic tables EXCEPT: | the tabletop materials offer high attenuation to lower patient dose |
| The component that supports and permits the x-ray tube to be moved in different directions is the: | tube stand or overhead tube crane assembly |
| In a fluoroscopic system, the surface or face of the fluoroscopic detector is considered the: | thin film transistor |
| All of the following are true of fluoroscopy EXCEPT: | the lead protective apron attached to the fluoroscopic carriage is of little value in reducing operator dose |
| Which of the following is not necessary for x-rays to be produced? | a source of protons |
| For pair production to occur, the energy of the incoming x-ray photon must be at least: | 1.02 MeV |
| The interaction of x-rays with matter that constitutes the greatest hazard to patients in diagnostic radiography is: | photoelectric interaction |
| The unit used to measure the amount of energy absorbed in any medium is the: | Gray |
| The maximum accumulated whole-body dose for a 35-year-old occupational worker is: | 350 mSv |
| According to the law of Bergonie and Tribondeau, the characteristics that determine the sensitivity of a cell to radiation are: | mitotic activity and structure and function of the cell |
| The intensity of radiation from a radiographic tube was 35 mR at a distance of 2.5 m from the tube. What would the intensity be at a distance of 4 m from the tube, all other factors remaining the same? | 14 mR |
| Which of the following is not a component of an optically stimulated luminescence (OSL) dosimeter? | exposure meter |
| What is the annual dose limit for occupational exposure? | 50 mSv |
| Lead absorbs x-rays through the process of | the Compton effect |
Created by:
chevonnecoetzer