Improving the Image: Collimation and Heel Effect



COURSE TOPICS: collimationheel effectimage quality


Collimation and Anode Heel Effect

  • Collimation
    • Design of the collimator
    • How the collimator works
    • Tricky issues with the collimator
    • How collimation improves radiographic definition (detail)
    • Details of just how much collimation affects safety
    • Hints for collimating and cropping
    • A terrific thing you can say to a patient about collimation
    • How to change a collimator light bulb
    • How to check your collimator light field
  • Anode Heel Effect
    • Why is it called the “heel’?
    • Two advantages of having the anode slanted
    • One drawback of having the anode slanted: “the anode heel effect”
    • How the heel effect is affected by SID
    • How the heel effect is affected by image field size
    • How to tell which end is which on your tube
    • How to take advantage of the heel effect in recumbent radiography
    • How to take advantage of the heel effect in upright radiography

About the On-Demand Video Format

  • This course consists of a 1-hour video, followed by a short quiz. A dated certificate of completion is available after you pass the quiz.
  • You can watch the video any time you wish, and you can take as long as you want to finish it. Your only deadline is your license renewal date.
  • Once you’ve purchased a course, it does not expire. Courses will remain available from your Account Dashboard, and you can rewatch them at any time.

About the quizzes

  • You have three chances to achieve the minimum passing score on the quiz. If you don’t pass on the first try, review your notes and rewatch the video, then try the quiz again.
  • If you are unsuccessful after three attempts, you will be blocked from completing the course.
  • We automatically get notified when this happens. We will reset the quiz for you to have another attempt after you rewatch the video.

How To Start

  • Log into your account and go to your Account Dashboard.
  • Download the notes from the Order History section.
  • Go back to the main Dashboard and click “your online courses.” All the courses you’ve purchased are listed here.
  • Click a course name and then click the first unit to begin.