front 1 The degree of attenuation depends on tissue characteristics. | back 1 true |
front 2 The dynamic display of a patient’s anatomy using x-radiation is
termed: | back 2 fluoroscopy |
front 3 The beam of photons, before it interacts with the patient, is called:
| back 3 primary radiation |
front 4 In a film-based imaging department, automatic processors are an
indispensable part of departmental operations. From the choices below,
which is NOT TRUE regarding automatic film processing? | back 4 They are maintenance-free and require annual cleaning. |
front 5 X-ray film imaging has been replaced by: | back 5 all of the above. |
front 6 The x-ray tube component that stops the stream of electrons and
produces the x-ray beam is called the: | back 6 anode. |
front 7 Of all of the energy traveling through the x-ray tube during a
radiographic exposure, the largest percentage of this electrical
energy is converted to: | back 7 thermal energy (heat). |
front 8 Indirect capture digital radiography is unlike direct capture
technology in that indirect technology uses: | back 8 a scintillator material to produce light in a two-step process. |
front 9 Both the size and the shape of an object can be distorted on a
radiographic image. | back 9 true |
front 10 The fluoroscopic image is a static image. | back 10 false |
front 11 The overall blackening of the film is called: | back 11 density |
front 12 There are four primary image quality factors. They are: | back 12 contrast, IR exposure or density, distortion, and recorded detail. |
front 13 Materials that allow x-ray photons to travel through easily are:
| back 13 radiolucent |
front 14 The device that intercepts the exit radiation from a patient and
creates the radiographic image is the: | back 14 image receptor. |
front 15 Inadequate mAs exposures in CR imaging technology will yield an image
that is: | back 15 grainy and demonstrates quantum mottle. |
front 16 The loss of radiographic image resolution is often referred to as
“unsharpness.” All of the following contribute to total image
unsharpness EXCEPT the: | back 16 size and shape of the exposure field (collimation). |
front 17 Milliampere-seconds directly control the quality of the x-ray photons
produced. | back 17 false |
front 18 Radiation that is nondiagnostic is called: | back 18 scatter radiation |
front 19 The invisible, unprocessed data on an image detector immediately
after x-ray exposure form the _____ image. | back 19 latent |
front 20 The inverse square law states that the intensity of a beam of
radiation is inversely proportional to the square of the distance from
the source. | back 20 true |
front 21 According to the inverse square law, if distance is doubled,
intensity decreases to _______ the original value. | back 21 1/4 |
front 22 The large focal spot is used when fine detail is required. | back 22 false |
front 23 A direct capture digital radiography detector uses _____ as the
receptor material. | back 23 amorphous selenium |
front 24 Contrast is the chief controlling factor of exposure and density.
| back 24 false |
front 25 High contrast has a short scale with wide latitude. | back 25 false |
front 26 All of the following are true of computed radiography (CR) EXCEPT:
| back 26 the image is recorded on an amorphous silicon digital detector plate. |
front 27 Which of the following is a TRUE statement regarding kilovolts peak
(kVp)? Kilovolts peak (kVp): | back 27 affects both x-ray beam quantity and quality. |
front 28 As mAs increases, density decreases. | back 28 false |
front 29 The process by which the nature of the primary beam is altered as it
travels through the patient is called: | back 29 attenuation |
front 30 Materials that are not easily traversed by x-ray photons are: | back 30 radiopaque |
front 31 The x-radiation that is “left over” and exits the patient to strike
the image receptor and create the image is known as _____ radiation.
| back 31 remnant |
front 32 kVp is the chief controlling factor of contrast. | back 32 true |
front 33 The three major classifications of diagnostic radiographic imaging
include each of the following except: | back 33 radiation therapy |
front 34 Bowel gas in the abdomen would be an example of a _____ material,
with regard to the x-ray beam. | back 34 radiolucent |
front 35 Scatter can be controlled by using an automatic processor. | back 35 false |
front 36 To change kVp while maintaining the same exposure: | back 36 increase kVp 15% and 1/2 mAs |
front 37 The beam that exits the patient is called: | back 37 remnant radiation |
front 38 The production of x-radiation that occurs in an x-ray tube requires
the movement of negatively charged particles traveling from one side
of the tube to the other. This movement of charges must occur in:
| back 38 a vacuum. |
front 39 Detail is affected by patient motion. | back 39 true |
front 40 Doubling the kVp doubles the exposure. | back 40 false |
front 41 The individual packets of energy contained in the primary beam are
called: | back 41 photons |
front 42 Digital imaging requires a filmless system. | back 42 true |
front 43 The SID is the distance between: | back 43 the tube and the image receptor |
front 44 As you process a radiographic image of the abdomen of a small child,
you notice a small ringlike object on the image. It appears this
object is in the patient’s stomach, which is consistent with the
examination history. The ring shows on the x-ray image because of its
metallic density. This is the result of: | back 44 attenuation of the x-ray beam by the metallic density of the ring. |
front 45 The primary beam can be modified through the use of filtration and
beam limitation. | back 45 true |
front 46 Which combination would produce an mAs of 10? | back 46 200 mA, mc, 1/20 sec |
front 47 When radiographic images of patients are created, many exposure
variables come into play to produce optimum image quality. Any change
in the radiographic image impression should be the result of: | back 47 the patient’s medical condition as reflected in the image characteristics. |
front 48 Kilovoltage peak directly controls the quality of the x-ray photons
produced. | back 48 true |
front 49 An effective method to overcome superimposition of patient anatomy on
a radiograph is to: | back 49 2 and 4 only |
front 50 All of the following are related EXCEPT: | back 50 a lead barrier to stop the production of heat formation. |
front 51 The distinct representation of an object’s true borders is called:
| back 51 detail |
front 52 The invisible image recorded on a film that has not been processed is
what type of image? | back 52 latent |
front 53 The misrepresentation of an object’s true size or shape is called:
| back 53 distortion |
front 54 The radiographer has control of which one of the following technical
factors? | back 54 all of the above |
front 55 Automatic processing of radiographic images requires approximately:
| back 55 1.5 minutes |
front 56 The total quantity of x-ray photons produced during an exposure is
determined by the: | back 56 mAs. |
front 57 The darkness of a film image is referred to as radiographic density.
Given the three sets of mAs calculations that follow, all three should
yield the same degree of radiographic density. | back 57 mAs reciprocity. |
front 58 As you position patients for various radiographic procedures, you
will occasionally angle the x-ray tube assembly. This intentional use
of tube angles is referred to as: | back 58 shape distortion. |
front 59 As you perform a portable chest radiograph, the optimal SID of 40
inches is unattainable because of orthopedic supports over the
patient. It is necessary for you to shorten the SID to 34 inches. A
professional radiographer should do which of the following? | back 59 Indicate the shorter SID on the examination notes to the radiologist. |
front 60 The visible difference between densities is called: | back 60 contrast |