ARRT MOCK EXAM 2
COMPLETE ANSWERS 100% CORRECT (LATEST 2024 / 2025 )
• (image production) Grid radius is described as:
- The height of the lead strips divided by the distance between the lead strips
- The distance between the lead strips divided by the height of the lead strips
- The number of lead strips divided by the height of the lead strips
- The SID at which the grid may be used: d. The SID at which the grid may be used
• (image production) Grid ratio is described by which of the following?
- H & D curve
- H/D
- mAs=mAs
d. 15% rule: b. H/D
• (image production) Grid ratio is expressed as:
- Length of the lead strips to the interspace between them
- Height of the aluminum strips to the interspace between them
- Height of the interspacers to the lead strips
- Height of the lead strips to the interspace between them: d. Height of the lead strips to the
interspace between them
• (image production) How does beam restriction affect contrast?
- Decreases
- Longer scale of contrast
- Shorter scale of contrast
d. No effect: c. Shorter scale of contrast
• (image production) Image acquisition , image display, and image storage are the primary components of what system?
- DICOM
- CR/DR
- PACS
d. HIS: c. PACS
• (image production) Image artifacts are usually classified as:
- Scatter
- Plus or minus density
- Compton and photoelectric
d. Patient motion and equipment motion: b. Plus or minus density
- / 3
• (image production) Inaccurate use of grids may result in repeat exposures due to what condition?
- Overexposure
- Grid analysis error
- Underexposure
d. Grid cutoff: d. Grid cutoff
• (image production) Instead of Vidicon or Plumbicon tubes, what device may be used in the television system?
- Charge-coupled device (CCD)
- C-arm
- Automatic brightness control
d. Output phosphor: a. Charge-coupled device (CCD)
• (image production) Manual manipulation of the digital image after acquisition is referred
to as:
- Digital coding
- Postprocessing
- Leveling
d. Archiving: b. Postprocessing
• (image production) Structures seen outside of the collimated area on a radiograph, are the
result of:
- Electron interaction within the x-ray tube ar a point other than the focal spot
- Scatter radiation emanating from the patient or tabletop
- Using an SID that is not recommended
- The x-ray tube positioned off-center to the grid: a. Electron interaction within the x-ray tube
ar a point other than the focal spot
• (image production) the accuracy of collimation at a 60 inch SID must be:
- +/- 6 inches
- +/- 3 inches
- +/- 2 inches
d. +/- 1.2 inches: d. +/- 1.2 inches
• (image production) The accuracy of collimation at a 72 inch SID must be within:
- +/- 1.44 inches
- +/- 7.2 inches
- +/- 3.6 inches
d. +/- 0.02 inches: a. +/- 1.44 inches
- / 3
• (image production) The electronic device that may be used for many quality control tests on
the x-ray equipment is the:
- Automatic exposure control
- Digital densitometer Correct
- Pentrometer
d. Densitometer: b. Digital densitometer
• (image production) The feature of the image intensifier that ensures the radiation dose
striking the input phosphur is constant is the:
- Photocathode
- Electron focusing lens
- Automatic brightness control
d. Vidicon tube: c. Automatic brightness control
• (image production) The filament circuit makes use of what type of trans- former?
- Step-up
- Autotransformer
- Step-down
d. Falling load: c. Step-down
• (image production) The measure of a grid's ability to enhance contrast is called:
- Grid ratio
- Grid selectivity
- Speed
d. Contrast improvement factor: d. Contrast improvement factor
• (image production) The primary type of grid used in diagnostic imaging is:
- Crosshatch
- Parallel
- Rhombic
d. Focused: d. Focused
• (image production) The smallest particle of a compound that retains the characteristics of
the compound is a(n):
- Element
- Atom
- Molecule
d. Neutron: c. Molecule
• (image production) Twice as many electrons strike the target in the x-ray tube when:
- kVp is doubled
- / 3