CT Artifacts

Here is a PDF document on CT Artifacts.

Answer the following questions based on material from the article.


CT artifacts originate from a range of sources.

Fill in the blanks for each of the different types of artifacts listed below (1-4):

1. ______________artifacts result from the physical processes involved in the acquisition of CT data.


2. Patient-based artifacts are caused by such factors as ___________________ or ________________.


3. Scanner-based artifacts result from ______________________.


4. Helical and multisection technique artifacts are produced by the ___________________.


5. What do the authors of the article consider to be the “most important factors in avoiding CT artifacts”.


6. What is the definition of the term artifact given by the author as it relates to CT?

7. List four methods/techniques used by CT equipment manufacturers to reduce beam hardening artifacts.

8. What is the best way to avoid partial volume artifacts?

9. What is milliamperage modulation, and why is it used?

10. What is cardiac gating (how does it work, and what does it do)?