Which type of data is needed to perform a retrospective reconstruction?

Skin erythema, hair loss, cataracts, and sterility are examples of what type of radiation bioeffect?

Which of the following matrix size would result in best spatial resolution?

The CT number of water is:

A 25-year-old female is scheduled for a CT scan of the sinuses. She is not absolutely certain that she is not pregnant, and it has been three weeks since her last menstrual period. Of the following, which is the best course of action?

Which of the following pixel sizes provides the best spatial resolution?

Restricting the passage of low energy x-rays is the function of which of the following?

Which of the following best describes the artifact seen in the image?  out of field artifact.jpg

Which of the following CT dose descriptors accounts for the irradiated length of a scan, not just a single slice?

In CT, written informed consent must always be obtained prior to the examination when: