Exam 4: Effective Use of Computed Radiography

The problem with the high frequency grids is that as the frequency increases, the lead content ____.

If the receptor is overexposed by a factor of ____, one would assume that the patient received an equally high exposure.

____________________ exposures are dramatically affected by the additional scatter, which may not even be removable by a grid.

If the exposure field is not recognized, the off-focus radiation and scatter outside the exposure field become part of the ____________________.

The optimal alignment for all digital detectors is to have the part and beam centered to the receptor, with four collimation margins perpendicular to the cassette edges.

What is the standard expression for the receptor's contribution to recorded detail?

The lack of ____________________ generates more scatter that reduces the contrast.

Overexposure implies dark images and underexposure implies light images.

What would substantial (>2x) overexposure of a body part generate in proportion to the overexposure?

Which of the following has more of an effect on image contrast than the kVp?

If a vendor provides a fixed-speed class operation, the system operates as a screen/film system of the selected ____________________.

What limits the irradiated volume and reduces undercutting?

When performing a mobile chest scan, how is the cassette normally oriented?

The optimal alignment is field-centered to the ____________________ with four collimation margins parallel to the cassette edges.

What is likely to occur if there is substantial extraneous exposure on the plate?

Which exposure causes the system to rescale the image as if the plate is actually underexposed?

Currently, each major vendor uses a unique ____________________ indicator whose values indicate the exposure delivered to the plate.

In order to visualize the____________________ structures of interest, some initial preprocessing must occur during imaging data extraction.

Acquiring one image on the smallest plate available avoids which recognition error?

By reducing the acquired data width, more of the ____________________ may be visualized for a single image display setting.