Portland Community College | Portland, Oregon

Course Number:
RAD 215
Course Title:
Principles of Exposure II
Credit Hours:
Lecture Hours:
Lecture/Lab Hours:
Lab Hours:
Special Fee:

Course Description

Introduces theory and application of inverse square law, distortion, radiographic quality, technique conversion factors, formulation of technique charts, and quality assurance. Lab includes use of energized equipment and test tools. Department permission required. Prerequisites: RAD 132.

Addendum to Course Description

The student will develop knowledge and skills in the following areas: geometric aspects, photographic aspects, radiographic image quality,
conversion factors, exposure guides, special modalities and quality assurance.
Principles of Exposure II (RAD 215) is required to graduate from the Radiologic Technology Program. It 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

  1. Formulate and adapt exposure techniques to obtain quality radiographs when patient or equipment factors change.
  2. Practice quality assurance.

Outcome Assessment Strategies

  1. Develop a research paper based on projects listed in "Integrated Mathematics of Radiographic Exposure".
  2. Demonstrate an understanding of quality analysis by providing critique and correction of a reject analysis film.

Course Content (Themes, Concepts, Issues and Skills)

Themes, issues and concepts
Geometric Aspects
Photographic Aspects
Scatter and Fog
Radiographic Image Quality
Radiographic Detail
Quantum Mottle
Modulation Transfer Function
Conversion Factors
Intensifying Screens
Field Sizes
Kilovoltage, Distance, and Disease
Exposure Technique Chart
Equipment Charts
Special Modalities
Direct Radiographic Enlargement
Quality Improvement
Evaluation of Quality Assurance
Equipment Monitoring
Processing and Ancillary Equipment
Repeat Analysis

  1. Use principles of various geometrical factors to obtain clinical images with high resolution.
  2. Utilize techniques for reducing unsharpness due to motion, screen/film and absorption.
  3. Analyze radiographs to use appropriate adjustments to compensate for variation in density and contrast to produce diagnostic images.
  4. Design a technique chart from a limited number of phantom test images.
  5. Use various tests to monitor equipment performance.
  6. Use principles of quality assurance to collect and analyze test data.