Lobel Quiz chapter 11

What is the primary beam?

• Radiation after interacting with the patient

• Radiation before any interaction with the patient

• Radiation that forms the image

• None of the above

The remnant beam is defined as:

• The radiation that does not enter the patient

• The radiation that exits the patient

• The primary beam

• The radiation absorbed by tissues

What percentage of the primary beam typically becomes the remnant beam?

• 10%

• 50%

• Less than 1%

• 25%

The primary beam diverges from which point?

• Object

• Image Receptor

• Focal Spot

• Remnant Beam

The central ray (CR) is:

• Divergent and isotropic

• Perpendicular to the Image Receptor

• The same as the primary beam

• A type of remnant beam

SID stands for:

• Source-to-Image Distance

• Source-to-Interaction Distance

• Surface-to-Image Distance

• Source-to-Object Distance

What effect do the distances (SID, SOD, OID) have?

• Color of the image

• Image distortion and spatial resolution

• Thickness of the object

• None of the above

The CR is critical in positioning the patient because:

• It is the point of maximum beam divergence

• It is the point of least beam divergence

• It determines the image receptor type

• It affects patient comfort

Which of the following is NOT a type of Image Receptor?

• Film Cassettes

• Computed Radiography Cassettes

• Direct Digital Radiography

• Photographic Paper

Technical variables in radiography include:

• Body habitus

• Kilovoltage (kVp)

• Viewing conditions

• Image processing