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CCOG for RAD 115 Spring 2023

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Course Number:
RAD 115
Course Title:
Principles of Exposure I
Credit Hours:
Lecture Hours:
Lecture/Lab Hours:
Lab Hours:

Course Description

Covers production and control of scattered radiation, stereo radiography, grid technique, filtration, half value layer, magnification, contrast and density principles. Includes a lab experience for applying the theories using energized equipment and test tools. Prerequisites: RAD 106.

Addendum to Course Description

This course is an introduction to the basic principles radiographic exposure and technique and is the first in a series of three courses on
this subject. Each course builds upon information from the previous courses in the series. The student will receive instruction on the physical laws that underlie the production of x-rays in a medical environment. Secondary topics that affect x-ray production will also be discussed.
This course is required as part of the Radiologic Technology degree program. Prior to enrolling in this course the student must be accepted in the Radiologic Technology Program, and have competed Radiation Physics I. This course is also a prerequisite for taking the American Registry of Radiologic Technologists examination for certification in Radiography. Transferability of credit depends entirely upon the institution to which the student wishes to transfer.

Intended Outcomes for the course

Upon completion of the course students should be able to:

  • Operate ancillary equipment in the production of radiographic images.

  • Apply knowledge of image quality technique factors to produce quality diagnostic radiographic images.

Outcome Assessment Strategies

  1. Produce radiographs demonstrating exposure technique manipulations.
  2. Document in writing the influence of technique factors on image quality.

Course Content (Themes, Concepts, Issues and Skills)

Themes, issues and Concepts
Interaction of x-radiation with matter
Technical factors
Atomic structures and basic interactions
Controlling secondary and scattered radiation
History of a grid
Construction of a grid
Types of grids
Grid characteristics
Errors in use of grid
Technique conversion for grids
Grid selection
Producing stereoradiographs
Viewing stereoradiographs
Process of filtration
Additional filters
Half-value layer
Magnification (size distortion)
Equipment Charts
Function and Application

  1. Learn the basic interactions of x-ray with matter, the technique factors affecting density and contrast, and methods of controlling scatter.
  2. Explain the selection and utilization of grids.
  3. Produce and view stereoradiographs.
  4. Understand the use of filtration and be able to determine the half value layer on a machine.
  5. Discuss how geometric relationships affect image quality.