Digital Radiography

 

Outline and Learning Guide


 

 

 

Learning Objectives

  • Identify and briefly describe the functions of a total digital radiography system.

  • Describe the general advantages of digital radiography compared to film/screen radiography.

  • Describe the general function of the receptor within a total digital radiography system.

  • Describe the general function of the image management component within a total digital radiography system.

  • Describe the general function of the image processing component within a total digital radiography system.

  • Describe the general function of the memory and storage component within a total digital radiography system.

  • Describe the general function of the display and display control component within a total digital radiography system.

  • Describe the general function of the  communications network within a total digital radiography system.

  • Describe the general function of the patient information system with respect to a digital radiography system.

  • Describe and explain the general function of a direct digital radiography receptor.

  • Describe and explain the imaging process using a stimualible phosphor digital radiography receptor.

  • Compare the advantages and disadvantages of direct and stimualible phosphor receptor systems.

  • Illustrate and describe the concept of dynamic range for a radiography receptor.

  • Sketch and explain the factors that limit the dynamic range (latitude) of radiographic film.

  • Sketch and compare the dynamic range (latitude) of film and digital radiography receptors.

  • Describe some advantages and possible disadvantages of the wide dynamic range of digital radiography receptors.

  • Identify and briefly describe the factors in a digital radiography system that have an effect on contrast sensitivity and image contrast.

  • Identify and briefly describe the factors in a digital radiography system that have an effect on blurring and visibility of detail.

  • Identify and describe the principle factor that affects image noise in digital radiography.

  • Describe the process that a radiographer should follow to insure a proper balance between patient exposure and image noise in digital radiography.

 

 

Text Reference

Physical Principles of Medical Imaging, 2nd Ed
Chapter 22

Medical Physics Publishing,  http://www.medicalphysics.org

 

 

Mind Map