Radiographic Exposure: Exposure Technique (kVp)

Difference between adjacent densities

Difference between adjacent densities that comprise the contrast are great.

Fewer shades of gray are present.

Three other terms for High Contrast:

Differences between adjacent densities are minimal.

Different names for Low Contrast

An abdomen x-ray is an example of ____ ____.

High contrast uses ____ kVp.

Low contrast uses ____ kVp.

The number of useful visible densities or shades of gray on a radiograph.

Total amount of contrast is determined by which two things?

The range of differences in the intensity of the x-ray beam after it's been attenuated by the patient.

The absorption characteristics of the anatomic tissue imaged & the quality of the x-ray beam.

Subject Contrast is determined by:

_____ is the primary controller in subject contrast.

Increasing kVp increases fog levels (_____).

_____ _____ is a simple tool to help focus on the contrast in a selected area.

This helps to eliminate adjacent information making evaluation easier.

Contrast mask should not replace _____.

_____ is a post exposure tool.

A visible change in contrast will not be visible until kVp is change by ____ - ____%, depending on range.